2024-03-29T00:01:55Z
https://ijfac.unsri.ac.id/index.php/ijfac/oai
oai:ijfac.unsri.ac.id:article/168
2020-12-02T06:46:22Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/168
2020-12-02T06:46:22Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 5, No 1 (2020): February 2020; 1-6
Effect of Carbonization Time of Mesoporous Carbon in the Dyes Adsorption: Rhodamine B, Methylene Blue and Carmine
Misriyani, Misriyani; Alkhairaat University
Setianingsih, Tutik; Brawijaya University
Darjito, Darjito; Brawijaya University
2020-02-17 13:43:00
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/168
en
Study of dyes adsorption (rhodamine B, methylene blue and carmine) by using mesoporous carbon synthesized at various carbonization time has been done. Purpose of this research was to understand influence of carbonization time to performance of the mesoporous carbon in dyes adsorption. In addition, adsorption performance of the mesoporous carbon and commercial carbon were compared. The adsorption test were conducted at conditions: 0.1 g of adsorbent, 25 mL of dyes solutions 100 ppm and shaking rate 125 rpm for 4 hour. Filtrate was used to determine remain concentration of the dyes with UV-visible spectrophotometry. Result of the research showed that the carbonization time from 1 to 3 hours improved the adsorption, whereas from 3 to 5 hours decreased it. The best character of the mesoporous carbon was obtained at carbonization time of 3 hours with adsorption values of 96.43 ± 0.37 % for rhodamine-B, 38.80 ± 1.44 % for methylene blue and 48.51 ± 1.55 % for carmine. The adsorption values of the mesoporous carbon were 0.97 times for rhodamine B, 0.48 times for carmine, and 0.39 times for methylene blue compared with the commercial activated carbon.
oai:ijfac.unsri.ac.id:article/234
2022-02-03T08:33:41Z
ijfac:ART
ec_fundedresources
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/234
2022-02-03T08:33:41Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 6, No 3 (2021): October 2021; 109-114
Preparation and Characterization of Ti-Co/C catalyst for PEMFC Cathode
Adhiyanti, Nurmalina; Sriwijaya University
Rohendi, Dedi; Sriwijaya University
Syarif, Nirwan; Sriwijaya University
Rachmat, Addy; Sriwijaya University
2021-10-20 21:56:21
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/234
DIPA of Public Sevice Agency of Sriwijaya University 2021
en
A Ti-Co/C catalyst was prepared using impregnation-reduction method and characterized using cyclic voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS) methods. This study aimed to compare the result between matrix carbon Vulcan XC-72R and Dots carbon which was applied to Ti-Co/C catalyst, also to compare the method of coating catalyst on GDL layer were Doctor Blade and spraying methods. The result was confirmed that Ti-Co/C with the ratio of Ti:Co 50:50, using Dots carbon as its matrix and spraying method preparation has ECSA value and conductivity respectively 28.72 cm2/g and 0.1688 x 10-3 S/cm, those were the highest value than another method. The conclusion of this study was non-platinum catalyst Ti-Co/C which used Dots carbon as a matrix and the spraying method showed a good response as a cathode catalyst of PEMFC
oai:ijfac.unsri.ac.id:article/10
2018-02-20T04:24:30Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/10
2018-02-20T04:24:30Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 1, No 2 (2016): June 2016; 35-41
Preparation And Characterization Of Cr/Activated Carbon Catalyst From Palm Empty Fruit Bunch
Fanani, Zainal; Department of Chemistry Sriwijaya University
Rohendi, Dedi
Dewi, Tri Kurnia
Dzulfikar A, Muhammad
2016-09-15 10:47:12
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/10
en
Preparation and characterization of Cr/activated carbon catalyst from palm empty fruit bunch had been done. The research were to determine the effect of carbonization temperature towards adsorption of ammonia, iodine number, metilen blue number, and porosity of activated carbon and Cr/activated carbon catalyst. The determination of porosity include surface area, micropore volume and total pore volume. The results showed the best carbonization temperature activated carbon and Cr/activated carbon catalyst at 700°C. The adsorption ammonia of activated carbon and Cr/activated carbon catalyst as 6.379 mmol/g and 8.1624 mmol/g. The iodine number of activated carbon and Cr/activated carbon catalyst as 1520.16 mg/g and 1535.67 mg/g. The metilen blue number of activated carbon and Cr/activated carbon catalyst as 281.71 mg/g and 319.18 mg/g. The surface area of activated carbon and Cr/activated carbon catalyst as 1527.80 m2/g and 1652.58 m2/g. The micropore volume of activated carbon and Cr/activated carbon catalyst as 0.7460 cm3/g and 0.8670 cm3/g. The total pore volume of activated carbon and Cr/activated carbon catalyst as 0.8243 cm3/g and 0.8970 cm3/g.Keywords : activated carbon, palm empty fruit bunch, porosity, catalyst, chromium
oai:ijfac.unsri.ac.id:article/308
2023-06-27T14:21:49Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/308
2023-06-27T14:21:49Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 8, No 2 (2023): June 2023; 55-62
Analysis of Lead (Pb) and Cadmium (Cd) in Oyster Crassostrea gigas and Saccostrea cucullata using Atomic Absorption and Ultraviolet-Visible Spectrophotometer Methods
Lelifajri, Lelifajri; Universitas Syiah Kuala
Salsabila, Salsabila; Universitas Syiah Kuala
Suhud, Khairi; Universitas Syiah Kuala
2023-06-27 21:18:49
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/308
en
Lead (Pb) and Cadmium (Cd) metals are highly toxic when accumulated in the body and cause serious diseases and even death. This study aimed to determine the metal content of Pb and Cd in the oyster species Crassostrea gigas and Saccostrea cucullate in the Lampulo and Krueng Cut areas at three different places. Analysis of the metals was carried out using AAS and UV-Visible spectrophotometers. Samples were prepared using concentrated HNO3 wet destruction and the addition of dithizone. The results showed Pb measured by AAS in Saccostrea cucullata 2.33-8.00 ppb, and by UV-Vis 2.77-8.66 ppb. Pb within Crassostrea gigas by AAS method 1.77-10.30 ppb, and by UV-Vis method 2.11-10.66 ppb. The Cd metal measured by AAS in Saccostrea cucullate is 3.80-10.50 ppb, and by UV-Vis method is 4.29-10.77 ppb, whereas Cd in Crassostrea gigas measured by AAS is 12.11-13.22 ppb and by UV-Vis method is 12.77-13.66 ppb. Linearity of Pb measurements with AAS and UV-Vis was obtained R2 =0.9979 and R2 =0.9938 and for Cd were R2 =0.9986 and R2 =0.9810. Accuracy (%recorvery) of Pb measurements by AAS and UV-Vis are 80-110% and 98-113% whereas Cd showed 100-106% and 91-107% respectively. The relative value of the standard deviation (%RSD ± SD) is 0.001 indicating excellent measurement results. Based on t-test calculations, measurements of Pb and Cd levels showed no difference between the AAS method and the UV-Vis method
oai:ijfac.unsri.ac.id:article/98
2018-06-05T02:25:28Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/98
2018-06-05T02:25:28Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 3, No 2 (2018): June 2018; 47-53
Assessing the Effectiveness of Top Leaf Meal of Indigofera zollingeriana to Substitute Soybean Meal through Evaluation on Protein Quality and Metabolic Energy in Poultry Feed
Palupi, Rizki; Sriwijaya University
Sumiati, Sumiati; Bogor agricultural University
Astuti, Dewi Apri; Bogor Agricultural University
Abdullah, Luki; Bogor Agricultural University
2018-06-04 21:33:54
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/98
en
This study aimed to evaluate protein quality of top leaf meal of Indigofera zollingerina based on its net protein utilization (NPU) as well as to evaluate its metabolizable energy. Fifty broiler chicks were used in determination of NPU while fifteen broiler strain Cobbs chickens aged 5 weeks were used for metabolizable energy measurement. This study used descriptive method in which data obtained were analyzed and compared to NPU and metabolizable energy of soybean meal. The results showed that top leaf meal of Indigoferazollingerinahad NPU of 38.58 – 46.98, which is 70.14% - 85-42% of that of soybean meal (55). Its metabolizable energy was 2791.12 kcal/kg and was 9.46% higher than that of soybean meal. As the NPU and metabolizable energy were close to those of soybean meal, top leaf meal of Indigoferazollingerinacan be used to substitute protein from soybean meal in poultry feed.
oai:ijfac.unsri.ac.id:article/154
2019-06-10T04:23:26Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/154
2019-06-10T04:23:26Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 4, No 2 (2019): June 2019; 82-90
Synthesis and Structural Analysis of Magnesium Oxide Nanomaterial Using Ethanol as Polymerization Solvent
Sutapa, I Wayan; Department of Chemistry, Faculty Mathematics and Natural Science, Pattimura University, Jalan Ir. Putuhena No. 1 Ambon Maluku.
Wahab, Abdul Wahid; Department of Chemistry, Faculty of Mathematics and Natural Science, Hasanuddin University
Taba, Paulina; Department of Chemistry, Faculty of Mathematics and Natural Science, Hasanuddin University
La Nafie, Nursiah; Department of Chemistry, Faculty of Mathematics and Natural Science, Hasanuddin University
2019-06-10 11:23:18
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/154
en
The purpose of the study was to synthesize MgO nanomaterials using sol-gel method with ethanol as solvent and to perform structural analysis of the products. Mg-oxalate was initially prepared prior magnesium acetate. Magnesium acetate dissolved in ethanol, and the oxalic acid added to adjust pH until gel phase formed. The gel was heated at 100 C for 24 hours to produce magnesium oxalate solids. Solids was sieved using ±150 mesh then annealed at 550 C for 6 hours to produce MgO nanomaterial. The magnesium oxalate was characterized using FT-IR, XRD, and SEM. FT-IR peak at 3408.22 cm-1; 1709.35 cm-1; 1375.39 cm-1; 830.32 cm-1; 420.48 cm-1, and the XRD peak 17.95o; 22.97o; 25.02o; 27,94o; 35.10o; 37,63o; 44.16o were characteristic of Mg-oxalate. Meanwhile, FT-IR band at 1030.24 cm-1; 2358.94 cm-1; 1627.92 cm-1; 1417.66 cm-1; 437.84 cm-1, and XRD peak at 38.92o; 43.3o; 56.02o; 62.64o; 74.88o and 79.04o shows characteristic of MgO nanomaterial. Structure analysis shown the MgO nanomaterials has an average crystal size 8.11 nm, and lattice length 21.21 nm. The values of strain, stress, energy density crystal and dislocation density of the MgO are 5.3 x 10-5 MPa, 32.97 MPa, 154.81 J/nm2, 1.52 x 10-3 nm-2 respectively. Morphologically the MgO nanomaterial produced is cubic.
oai:ijfac.unsri.ac.id:article/217
2022-02-03T07:54:32Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/217
2022-02-03T07:54:32Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 6, No 2 (2021): June 2021; 53-58
The Analysis of Manganese (Mn) in Waste Water Treatment (IPAL) of Coal Mine of PT Bukit Asam Indonesia
Kasmiarti, Getari; Sriwijya University
Sakinah, Rona Ayu; Sriwijaya University
Yudono, Bambang; Sriwijaya University
2021-06-18 21:01:29
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/217
en
Wastewater from the coal mining process containing heavy metal manganese is bad for water body and health of living things around it. The South Sumatra Governor Regulation states that the content of iron (Fe) and manganese (Mn) must contain a maximum total of 7 mg/L and 4 mg/L before being released into the environment. This study aimed to verify the total dissolved Mn analysis method. Thirty-four (34) samples from the wastewater treatment plant pond were digested and measured by the Atomic Absorption Spectrophotometer (AAS) at a wavelength of 279.5 nm. The analyzes performed were the precision, sensitivity, linearity, LOD detection limits and LOQ quantization limits. The measurement results showed the parameter value for a precision of 1.562%; linearity (coefficient of determination) standard curve 0.9939; sensitivity 0.0375; LOD 0.4287 g/mL; and LOQ 1.4291 g/mL. In conclusion, the measurement data for the total dissolved manganese met the quality standards for wastewater stated in the Regulation of the Governor of South Sumatra No.8 of 2012 by applying the predetermined method.
oai:ijfac.unsri.ac.id:article/30
2017-05-19T03:37:32Z
ijfac:ART
oai:ijfac.unsri.ac.id:article/271
2023-05-02T04:02:35Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/271
2023-05-02T04:02:35Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 7, No 3 (2022): October 2022; 113-121
Synthesis and Characterization of CaO-Zeolite Catalyst by Sonochemical Engineering Method
https://ijfac.unsri.ac.id/index.php/ijfac/article/download/271/1273
https://ijfac.unsri.ac.id/index.php/ijfac/article/download/271/1274
https://ijfac.unsri.ac.id/index.php/ijfac/article/download/271/1275
https://ijfac.unsri.ac.id/index.php/ijfac/article/download/271/1276
https://ijfac.unsri.ac.id/index.php/ijfac/article/download/271/1277
https://ijfac.unsri.ac.id/index.php/ijfac/article/download/271/1278
Widyarini, Widyarini; Universitas Sriwijaya
Bustan, Muhammad Djoni; Universitas Sriwijaya
Haryati, Sri; Universitas Sriwijaya
2022-10-28 19:45:05
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/271
Prof. M.Djoni Bustan, Teknik Kimia Universitas Sriwijaya
en
Calcium Oxide (CaO) loaded on zeolite was categorized as a heterogeneous catalyst. The utilization of CaO catalyst could be implemented in catalytic pyrolysis enhance gaseous production. In this paper, CaSO4.2H2O is an active site embedded in natural zeolite, and the activity of the CaO-Zeolite catalyst is synthesized by a sonochemical impregnation-assisted drying process and calcination. The stirrer impregnation method was used as a control. CaO-Zeolite catalyst characterization and properties were identified via Scanning Electron Microscopy- Energy Dispersive X-Ray (SEM-EDX).The activation experiments were performed at an oven temperature of 120oC for 5 h and a calcination temperature of 300oC for 2 h. The synthesized catalysts of sonochemical were performed at 20 minutes, 20 kHz, and 1200 Watt, and the synthesized catalyst of stirrer were performed at 120 minutes, 1500 rpm, and 1000 watts. The experimental results revealed that the characterization of the catalysts prepared by the sonochemical method was better than that of the stirrer. Specifically, obtained CaO-Zeolite catalyst with Ca wt % increased from 0.86 wt% NZ (natural zeolite) to (11.3 wt%, 14.15 wt% and 23.48 wt%) of sonochemical and (11.82wt%, 13.95 wt% and 20.64wt%) of stirrer. The results demonstrated that Ca wt% by sonochemical in 20 minutes dispersed at support surface (zeolite) more effective than stirrer in 120 minutes. These results were impacted by acoustic cavitation and shockwave of ultrasonic on solid-liquid transport and distribution. On the other side, sonochemical assisted the activation technique to minimize particle size and allowed metal oxide (CaSO4.2H2O) to be dispersed uniformly into the pores structure of the zeolite. The utilization of sonochemical in CaO-Zeolite synthesizing enhanced catalyst activity. Keywords: CaO/Zeolite catalyst, Calcination, Drying, Sonochemical Impregnation, Ca weight percentage, Characterization
oai:ijfac.unsri.ac.id:article/79
2018-02-20T03:16:26Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/79
2018-02-20T03:16:26Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 2, No 3 (2017): October 2017; 83-86
Kinetic and Thermodynamic Study Removal of Co(II) Using Biosorbent Spirulina sp. in Aqueous Solution
Mohadi, Risfidian; Department of Chemistry Sriwijaya University
Hermansyah, Hermansyah; Department of Chemistry, Universitas Sriwijaya
Hariani, Poedji Loekitowati; Department of Chemistry, Universitas Sriwijaya
Hanafiah, Zazili; Department of Biology, Universitas Sriwijaya
Zulkifli, Hilda; Department of Biology, Universitas Sriwijaya
2017-11-01 09:42:27
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/79
en
Kinetic and thermodynamic adsorption study of Co(II) ions from aqueous solutions by dried Spirulina sp. biomass was investigated in the batch system. The Spirulina sp. was isolated and cultured from algae swamp ecosystem in South Sumatera. The adsorption properties of Co(II) onto dried Spirulina sp. biomass was studied by the influence of contact time, initial metal ion concentration and reaction temperature. The experimental results were the rate of adsorption followed the second-order kinetic model with the rate of reaction k2 is 0.023 g mg-1 min-1 and the thermodynamic studies showed that the adsorption was well fitted to the Langmuir’s model, and the amount of Co(II) removed from solution increased with increasing Co(II) concentration with the higher adsorption energy was 10.38 kJ/mol at 30 °C.Keywords: Spirulina sp, Co(II), adsorption, algae swamp, South Sumatera
oai:ijfac.unsri.ac.id:article/191
2021-05-24T04:04:41Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/191
2021-05-24T04:04:41Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 5, No 3 (2020): October 2020; 71-77
Electrocoagulation Method to Reduce Pollutants in the Wastewater of Jumputan Fabric Industry
Rusdianasari, Rusdianasari; Politeknik Negeri Sriwijaya
Hajar, Ibnu; Politeknik Negeri Sriwijaya
Ariyanti, Indri; Politeknik Negeri Sriwijaya
2020-10-20 11:33:41
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/191
en
The existence of the textile industry in Indonesia is not only in the category of large and medium scale industries but also in small scale and some even in the home industry. These caused pollution mainly as a result of the dyeing of textiles. Dye not only occurs in industrial areas but also occurs in densely populated settlements. An attempt to treat the waste of the textile industry is needed to solve the environmental pollution. In this research, liquid waste was processed using the electrocoagulation method, and the expected concentration or hazard caused by waste was decreased and to fulfill the required environmental quality standard. Treatment of jumputan wastewater by electrocoagulation method using 4 aluminum electrodes 11x10.5 cm in size with MP-P configuration type (Monopolar-Paralel) for 120 minutes. The parameters measured in this study were chromium heavy metal content, TSS (Total Suspended Solid), TDS (Total Dissolved Solids), as well as changes in pH, color and turbidity values where the applied voltage variations were 10, 13, 15, 17, and 20 volts with variation of electrode distance used 1.5; 2.0; and 2.5 cm. The best condition for each parameter was obtained at a distance of 1.5 cm with a voltage of 20 volts. Effectiveness of electrocoagulation method to decrease turbidity value up to 99.84%; color 99.33%, chromium content of 62.5%; TSS 33.68%; TDS of 66.59% and raised the pH from 5.64 to 8.10, respectively.
oai:ijfac.unsri.ac.id:article/255
2023-05-02T03:15:11Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/255
2023-05-02T03:15:11Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 7, No 2 (2022): June 2022; 51-57
Isotherm and Thermodynamics Study of Congo Red and Procion Red Adsorption over Natural and Zn/Fe Pillared Bentonite
Desnelli, Desnelli; Department of Chemistry, Faculty of Mathematics and Natural Science, Sriwjaya University, Jalan Palembang Prabumulih Km 32 Indralaya, Indonesia, 30662
Research Centre of Advance Material and Nanocomposite, Faculty of Sciences and Mathematics, Universitas Sriwjaya, Jalan Palembang Prabumulih Km 32 Indralaya, Indonesia, 30662
Yohandini, Heni; Department of Chemistry, Faculty of Mathematics and Natural Science, Sriwjaya University, Jalan Palembang Prabumulih Km 32 Indralaya, Indonesia, 30662
Research Centre of Advance Material and Nanocomposite, Faculty of Sciences and Mathematics, Universitas Sriwjaya, Jalan Palembang Prabumulih Km 32 Indralaya, Indonesia, 30662
Nurnawaty, Elisa; Department of Biology, Faculty of Mathematics and Natural Science, Sriwjaya University, Jalan Palembang Prabumulih Km 32 Indralaya, Indonesia, 30662
Research Centre of Advance Material and Nanocomposite, Faculty of Sciences and Mathematics, Universitas Sriwjaya, Jalan Palembang Prabumulih Km 32 Indralaya, Indonesia, 30662
Hariani, Poedji Loekitowati; Department of Chemistry, Faculty of Mathematics and Natural Science, Sriwjaya University, Jalan Palembang Prabumulih Km 32 Indralaya, Indonesia, 30662
Research Centre of Advance Material and Nanocomposite, Faculty of Sciences and Mathematics, Universitas Sriwjaya, Jalan Palembang Prabumulih Km 32 Indralaya, Indonesia, 30662
2022-06-25 22:25:45
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/255
en
The effect of initial Congo Red and Procion Red concentration on isotherm adsorption and thermodynamic adsorption study using natural and Zn/Fe Pillared bentonite have been conducted. The adsorbents were also characterized by Fourier transform infrared (FTIR), X-Ray Diffraction (XRD), and Scanning electron microscope-energy dispersive X-Ray analysis (SEM-EDX). The study showed that the optimum dye removal of Congo Red and Procion Red was obtained at the initial dye concentration of 80 mg/L. The adsorption isotherm study showed that the Congo Red and Procion Red adsorption on natural and Zn/Fe Pillared bentonite followed the Freundlich isotherm model. The adsorption thermodynamics study showed that the adsorption of Congo Red and Procion Red occurred endothermically, wheraas the positive value of entropy indicated a high level of disorder of adsorption for both dyes. Furthermore, the FTIR, XRD, and SEM-EDX analysis showed that the pillarization of Zn/Fe on bentonite successfully well occurred, and it could be concluded that the adsorption of Congo Red using natural and Zn/Fe pillared bentonite showed a better adsorption process than Procion Red.
oai:ijfac.unsri.ac.id:article/47
2018-02-20T03:34:14Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/47
2018-02-20T03:34:14Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 2, No 2 (2017): June 2017; 28-33
Study on Groundwater Quality in Concern to Potent Pollution at Secondary Block P17-5N Delta Telang II (Case Study of Muliasari Village, Tanjung Lago Banyuasin District, South Sumatera Province Indonesia)
Novarika, Lilian; Universities Sriwijaya
Dinas Pertanian dan Ketahanan Pangan Kota Palembang
Susanto, Robiyanto Hendro
Faizal, Muhammad
Hariani, Poedji Loekitowati
2017-10-05 10:25:53
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/47
en
Research had been carried out on tidal marshes condition at tertiary channel Muliasari Village and the effect of land user behavior on water and soils quality. The aimed of research is to evaluate water and soil quality and potent pollution due to fertilizer and pesticide utilization. The research methods are survey and qualitative approach using observation and directed interview with questionnaire aid. Water and soils samples were taken by purposive sampling method. Measurement obtained soils has pH 4.59 and 3.92 for TC4 and TC5 respectively. Cation exchange capacity is 21.65 mg/100 g or TC4 and 20.62 mg/100 g for TC5. C-organic contained in both TC4 and TC5 are very high whereas Total-N is moderate hence ratio C/N has moderate value. P2O5 detected as 81.55 ppm at TC4 and 36.06 ppm at TC5. According to Soils Research Centre Bogor, TC4 and TC5 has moderate value of N (35%) while P and K very high (81.55 ppm and 103.32 ppm). Scoring result concluded that soils is in good health and has 76% (TC4) and 73% (TC5). Storet method confirmed score result for soils as B-class or in good condition. According to these result, TC4 and TC5 of Muliasari Village was lightly polluted and still has good prospect as crops land. Key Words: Tidal zone, Water quality, pollution
oai:ijfac.unsri.ac.id:article/334
2024-03-13T01:25:28Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/334
2024-03-13T01:25:28Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 9, No 1 (2024): February 2024; 1-8
Transesterification Process of Biodiesel with Potassium Glycerolate Catalyst
https://ijfac.unsri.ac.id/index.php/ijfac/article/download/334/1663
Erisna, Desi; Department of Chemical Engineering, Universitas Sriwijaya
Arita, Susila; Department of Chemical Engineering, Universitas Sriwijaya
Hadiah, Fitri; Department of Chemical Engineering, Universitas Sriwijaya
2024-02-25 22:54:33
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/334
en
The synthesis of potassium glycerolate catalyst from DES (Deep Eutectic Solvent – K2CO3-glycerol) catalyst was carried out by heating process with various temperatures. The resulting catalyst product was analyzed and the characteristics of the best potassium glycerolate catalyst had conductivity 4482 µS/cm, density 1.4858 g/cm3, Viscosity 121.574 cP, Freezing Point -8 ℃ and pH 14. The best temperature in the manufacture of potassium glycerolate catalyst was at 150 ℃. Alkaline pH is the main requirement to be a catalyst in the transesterification reaction. The trial results for the conversion of RBDPO to biodiesel with the optimum weight percent ratio of potassium glycerolate catalyst to RBDPO were 3.5%w, methanol 30%w, reaction temperature 65 oC, reaction time 4 hours resulted in total glycerol content in biodiesel 0.2285%, acid value 0.15%, density 0.8705 gr/cm3, viscosity 5.22 Cst, conversion 96.77% and 97.81% methyl ester content and all of these parameters all meet the biodiesel standards set by SNI-7182: 2015. Keywords: Catalyst Characteristics, Potassium Glycerolate, Transesterification, Biodiesel
oai:ijfac.unsri.ac.id:article/129
2019-02-13T03:38:32Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/129
2019-02-13T03:38:32Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 4, No 1 (2019): February 2019; 1-8
Studies on the Controlled Release of Drugs from Magnetic Nanobiocomposites
https://ijfac.unsri.ac.id/index.php/ijfac/article/download/129/505
Heinze, Thomas; Center of Excellence for Polysaccharide Research, Institute of Organic Chemistry and Macromolecular Chemistry, Friedrich Schiller University of Jena
Humboldstraße 10 D-07743 Jena, Germany
Müller, Robert; Leibniz-Institute of Photonic Technology (IPHT), P.O.B 100239, D-07702 Jena, Germany
Zhou, Mengbo; Center of Excellence for Polysaccharide Research, Institute of Organic Chemistry and Macromolecular Chemistry, Friedrich Schiller University of Jena
Humboldstraße 10 D-07743 Jena, Germany
Rabel, Martin; Department of Pharmaceutical Technology, Friedrich Schiller University of Jena, Otto-Schott-Straße 41, D-07745 Jena, Germany
Warncke, Paul; Institut für Pharmazie der Friedrich-Schiller-Universität Jena Otto-Schott-Straße 41, 07745 Jena
Fischer, Dagmar; Institut für Pharmazie der Friedrich-Schiller-Universität Jena Otto-Schott-Straße 41, 07745 Jena
2019-02-13 10:38:31
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/129
en
Magnetic nanocomposites are a class of smart materials that have attracted recent interest as drug delivery systems or as medical implants. In this study, meltable nanobiocomposites (NBC) composed of biocompatible dextran fatty acid ester and magnetic nanoparticles (MNPs) melting close to human body temperature were prepared and loaded with Rhodamine B (RhB) or green fluorescent protein (GFP) as model drugs to evaluate their potential use as drug delivery system. The release of the model drugs from the magnetic NBC investigated under the influence of a high frequent alternating magnetic field (AMF, 20 kA/m at 400 kHz) showed that on-demand release is realized applying the external AMF. The NBC showed a long-term stability (28 d) of the incorporated iron oxide particles after incubation in artificial body fluids. This work reveals the potential of the NBC as a drug carrier.
oai:ijfac.unsri.ac.id:article/180
2021-05-24T03:24:49Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/180
2021-05-24T03:24:49Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 5, No 2 (2020): June 2020; 29-34
The Analysis of Total Dissolved Iron from Mud Sedimentation Ponds Wastewater in PT Bukit Asam (Persero) Tbk Tanjung Enim Using Individual Control Diagram
Kasmiarti, Getari; Sriwijaya University
Yudono, Bambang; Sriwijaya University
2020-06-20 17:32:47
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/180
en
The tests have been carried out on the iron content of wastewater in the inlet and outlet of the mud sedimentation ponds PT Bukit Asam (Persero) Tbk Tanjung Enim, South Sumatra Province. The iron concentration in mining waste water that does not comply with government standards of 7.0000 mg / L can pollute the environment. The measurement of iron concentration was carried out by Atomic Absorption Spectrophotometer (AAS) method in accordance with SNI 06-6989.4: 2004. Analysis of iron concentration using calibration curve methods and individual control diagrams. The results of data analysis showed that the iron content of the inlet and outlet MSP (Mud Sedimentation Ponds) wastewater was still under the standard set with an average value of 1.4488 mg/L inlet and outlet 0.4061 mg/L. Based on the results of the study the concentration of iron meets the established quality standards.
oai:ijfac.unsri.ac.id:article/228
2022-11-07T07:58:21Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/228
2022-11-07T07:58:21Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 7, No 1 (2022): February 2022; 8-15
Design of Dry Cell HHO Generator using NaCl Solution for Hydrogen Production
Budiman, Arif; Politeknik Negeri Sriwijaya
Yerizam, Muhammad; Politeknik Negeri Sriwijaya
Bow, Yohandri; Politeknik Negeri Sriwijaya
2022-02-20 22:09:26
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/228
en
Excessive use of electricity produces emissions, as well as carbon will have impact on global warming because electricity mostly still using fossil-based energy. Usage of other alternative energy is beneficial to reduce dependence on the use of fossil fuels. Researchers are currently working to reduce the use of fossil energy by using renewable energy. Among the most common alternative energies found is water, so this research focuses on designing dry cell type HHO (Hydrogen Hydrogen Oxygen) Generator technology with hydrogen gas water electrolysis. The HHO generator functions to break water (H2O) into hydrogen atoms and oxygen atoms, known as HHO. Electrolysis testing using NaCl and a storage tube to see the rise and fall of water from the gas produced. NaCl used weighing 20 grams, 50 grams, 75 grams, and 100 grams dissolved in 500 cc of water. The results of the data obtained, many uses of NaCl produce hydrogen gas faster, the data shows 100 grams of NaCl at 180-210 seconds produces a gas volume of 175 CC compared to 20 grams produces a gas volume of 75 CC, 50 grams produces 125 CC, and 75 grams produces 150 CC
oai:ijfac.unsri.ac.id:article/26
2018-02-20T04:32:08Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/26
2018-02-20T04:32:08Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 1, No 3 (2016): October 2016; 61-66
Comparison of The Performance of Proton Exchange Membrane Fuel Cell (PEMFC) Electrodes with Different Carbon Powder Content and Methods of Manufacture
Rohendi, D.; Department of Chemistry Sriwijaya University
Majlan, E.H.
Mohamad, A.B.
Shyuan, L.K.
Raharjo, J.
2016-11-17 04:38:29
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/26
en
Abstract: Carbon powder in the gas diffusion layer (GDL) contained in the membrane electrode assembly (MEA) has an important role in the flow of electrons and reactant gas. Meanwhile, the method of making the electrode is one of the many studies conducted to determine the most appropriate method to use. Comparative study of the performance of proton exchange membrane fuel cell (PEMFC) electrodes with different carbon powder content (vulcan XC-72) in the GDL and methods of manufacture of the electrode between casting and spraying method has been carried out. The spraying method consists of one layer and three layer of catalyst layer (CL). The content of carbon powder in the GDL as much as 3 mg cm-2 has a better performance compared to 1.5 mg cm-2 with an increase of 177.78% current density at 0.6 V. Meanwhile, the manufacture of CL with three-layer spraying method has better performance compared with one-layer spraying and casting method.Key words: casting method, spraying method, catalyst layer (CL), GDL.Abstrak (Indonesian): Serbuk karbon pada lapisan difusi gas (LDG) yang menyusun elektroda membran memiliki peran penting dalam mengatur aliran elektron dan gas reaktan. Pada sisi lain metoda pembuatan elektroda adalah salah satu dari banyak studi yang dilakukan untuk menentukan metoda yang paling sesuai yang dapat dikerjakan. Telah dikerjakan studi komparatif kinerja membran penukar proton pada elektroda sel bahan bakar dengan kandungan serbuk karbon (vulcan XC-72) dalam LDG yang bervariasi dan studi komparasi metoda pembuatan elektroda secara tuang dan semprot. Metoda semprot dikerjakan dalam dua variasi yakni pembuatan lapisan katalis (LK) satu dan tiga lapisan. Kandungan serbuk karbon dalam LDG hingga 3 mg cm-2 memiliki kinerja lebih baik dibanding 1,5 mg cm-2 dengan peningkatan kerapatan arus 17,78% pada 0,6 V. Pembuatan LK dengan metoda semprot tiga lapisan memperlihatkan kinerja terbaik dibanding metoda semprot satu lapisan dan metoda tuang.Kata kunci: metode casting, metode spraying, layer katalis, GDL
oai:ijfac.unsri.ac.id:article/318
2023-06-27T14:21:49Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/318
2023-06-27T14:21:49Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 8, No 2 (2023): June 2023; 88-97
Flavonoid as Anti-Candida Agents
Susilawati, Susilawati; Postgraduate Program of Biomedical Science, Universitas Sriwijaya
Anwar, Chairil; Departement of Parasitologi, Faculty of Medicine, Universitas Sriwijaya
Saleh, Irsan; Departement of Parasitologi, Faculty of Medicine, Universitas Sriwijaya
Salni, Salni; Department of Biology, Faculty of Mathematics and natural Sciences, Universitas Sriwijaya
2023-06-27 21:19:11
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/318
english
Vulvovaginal candidiasis is the second most common cause of vaginitis after bacterial vaginosis with at least 75 – 80% of women have had one episode of VVC in their lifetime. Their prevalent resistance to most commonly used antifungal agents makes their treatment a challenge to physicians. Flavonoids have been shown to possess potent anti-Candida properties which can inhibit the growth and proliferation of Candida species through various mechanisms, including inhibition of fungal cell wall synthesis, disruption of fungal cell membrane integrity, and interference with fungal cell signaling pathways. Their potency makes them potential candidates for the development of antifungal agents for the treatment of candidiasis, alone or in combination with existing antifungal drugs. The review aims to explore the mechanisms by which flavonoids inhibit the growth and proliferation of Candida species, including the inhibition of fungal cell wall synthesis, disruption of fungal cell membrane integrity, and interference with fungal cell signaling pathways.
oai:ijfac.unsri.ac.id:article/107
2018-11-28T02:45:28Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/107
2018-11-28T02:45:28Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 3, No 3 (2018): October 2018; 71-76
Biodiesel Production from Waste Cooking Oil using Electrostatic Method
Susumu, Susumu; State Polytechnic of Sriwijaya
Rusdianasari, Rusdianasari; State Polytechnic of Sriwijaya
Yusi, Syahirman; State Polytechnic of Sriwijaya
2018-10-11 12:39:24
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/107
en
Biodiesel (methyl ester) produced from trans esterification of waste cooking oil is a potential material to replace diesel fuel. The biodiesel can be obtained by using electrostatic method equipped with fixed distance electrode 1.5 cm and voltage at 12 volts. Coagulation of particle process i.e. glycerin drops in biodieselglycerinmixture was based on electrical field. Reactants used were methanol over KOH catalyst and temperature was set at 60 C. The residence time was varied as well as methanol to waste cooking oil ratio. Analysis result shows the process was able to obtain yield up to 83.3%. The quality of biodiesel produced was tested and satisfy the requirement according to National Standard of Indonesia (SNI), i.e. density 0.8594 mg/mL (compared to SNI: 0.85-0.90 mg/mL), flash point 191 C (SNI min 100 C), water content 0.0342% (SNI max 0.05%) and viscosity at lower limit 2.31 cSt. According to SNI 7182-2015 the above value meets the specified standard.
oai:ijfac.unsri.ac.id:article/149
2019-10-22T08:10:26Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/149
2019-10-22T08:10:26Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 4, No 3 (2019): October 2019; 122-125
Development of the Potentiometric Method for Measurement of Cu
Sari, Rani Nawang; Master Program, Department of Chemistry, Sriwijaya University
Hariani, Poedji Loekitowati; Department of Chemistry, Sriwijaya University
Suheryanto, Suheryanto; Department of Chemistry, Sriwijaya University
2019-10-10 20:20:39
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/149
en
Potentiometry is one of method on measuring metals based on cell potential. Measurements using potentiometry are divided into comparative cells and concentration cells. Concentration cells are measurements of a cell's potential by using two solutions with different concentrations. The aim of this study was to develop a concentration cell potentiometric method equipped with applications so measurements are easier and faster. The added application able to calculate the results of experiments so that the calculation process becomes faster and easier. Validation results give the results of the R the value of 0.9990; LoD 7.6484x10-7, LoQ 6.2103x10-7, RSD 0.64%, and recovery 98.05%. This optimum measurement was carried out at 30 oC and pH 5. The results of Cu measurements in well water obtained the result of 0.9633 ppm. Measurements using the development of this method, get good validation results and can be used on measurements similar to those in the aquatic environment. Keywords: Potentiometry, cell concentration, Copper (Cu), validation, aquatic environment
oai:ijfac.unsri.ac.id:article/232
2022-02-03T08:32:59Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/232
2022-02-03T08:32:59Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 6, No 3 (2021): October 2021; 103-108
Bioethanol from Pineapple Peel with Variation of Saccharomyces Cerevisiae Mass and Fermentation Time
Yusmartini, Eka Sri; Universitas Muhammadiyah Palembang
Mardwita, Mardwita; Universitas Muhammadiyah Palembang
Marza, Junanda; Universitas Muhammadiyah Palembang
2021-10-20 21:56:18
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/232
en
The avaibility of energy from fossil fuel is gradually decreasing. The solution to overcome this problem is to develop an alternative energy source that can be renewed such as bioethanol. Bioethanol is a vegetable based fuel, an alternative energy that can be used as a subtitute for petroleum. One of the raw materials that can be used for the fermentation of bioethanol production is pineapple fruit skin. This research aims to utilize pineapple fruit waste as raw material for making bioetanol by fermentation process, with variations in the addition of saccharomyces cereviceae 20, 25 and 30 g, and time fermentation 5 and 9 days. The highest levels of bioethanol obtained 6,83 % at the addition of 25 g saccaromces cereviceae and fermentation time of 5 days. Keywords: pineapple skin, saccaromyces cereviceae, fermentation, bioethanol
oai:ijfac.unsri.ac.id:article/6
2018-02-20T04:20:49Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/6
2018-02-20T04:20:49Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 1, No 1 (2016): February 2016; 24-28
Thermal Stability and Acidity of Silica Supported Keggin Type Polyoxometalate K4[-SiW12O40]•nH2O
Me, Welinda; Department of Chemistry Sriwijaya University
Mohadi, Risfidian
Lesbani, Aldes
2016-09-13 16:32:19
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/6
en
Silica supported polyoxometalate K4[a-SiW12O40]·nH2O was prepared systematically using tetraethyl ortho silicate by sol gel method to form K4[a-SiW12O40]·nH2O/Si. Compound K4[a-SiW12O40]·nH2O/Si was characterized by diffraction, spectroscopic, and acidity analyses follow by thermal activity test at higher temperature up to 600 oC. Analysis of FTIR spectrum showed all unique vibration of polyoxometalate K4[a-SiW12O40]·nH2O was appeared at wavenumber 800-1000 cm-1 before and after supporting process. Crystallinity of K4[a-SiW12O40]·nH2O and K4[a-SiW12O40]·nH2O/Si were also similar without changing Keggin structure. Compound K4[a-SiW12O40]·nH2O/Si showed higher acidity than K4[a-SiW12O40]·nH2O probably due to Lewis acidity species. Keggin structure of K4[a-SiW12O40]·nH2O/Si was still retained up to 600 oC showing thermal stability of K4[a-SiW12O40]·nH2O/Si at high temperature.Keyword : Keggin polyoxometalate, tetraethyl ortho silicate, thermal stability, acidity
oai:ijfac.unsri.ac.id:article/293
2023-05-03T02:29:43Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/293
2023-05-03T02:29:43Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 8, No 1 (2023): February 2023; 25-33
Preparation and Characterization of Catalyst Zn/Al2O3 Catalyst using Dry and Wet Impregnation Method
Selpiana, Selpiana; Universitas Sriwijaya
Bahrin, David; Chemical Engineering Universitas Sriwijaya
Habibie, Muhammad Ridho; Chemical Engineering Universitas Sriwijaya
Samara, Faras Saskia; Chemical Engineering Universitas Sriwijaya
2023-02-25 22:22:06
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/293
en
Metal supported catalysts are used in many catalytic cracking processes. Experiments have shown that the increasing of metal loaded within the catalyst support may affected the increasing of cracking process conversion and selectivity. Therefore, a fundamental understanding of increasing the metal loaded is needed. In this study, Zinc on Alumina supported catalyst was prepared using the dry and wet impregnation methods to obtain the best amount of Zn metal content in Al2O3 as catalyst support with good characteristics for catalytic cracking. The prepared precursor solution in wet impregnation method was varied in concentration. While the dry impregnation method was varied in drying temperature. The Atomic Absorption Spectroscopy test results the metal content of Zn on the variation of precursor solution concentration on 0,5 M; 2,5 M; 4,5 M are 1,06%; 9,65%; 15,91% and in the variation of the drying temperature at 25ºC, 50ºC, and 80ºC respectively are 18,32%; 12,48%; and 39,07%. Characteristics analysis through X-Ray Diffraction, Brunauer-Emmet-Teller, and Scanning Electron Microscopy tests have also been carried out on samples with the highest metal content of 39,07% and samples with the lowest metal content of 1,06%.
oai:ijfac.unsri.ac.id:article/89
2018-02-18T13:56:07Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/89
2018-02-18T13:56:07Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 3, No 1 (2018): February 2018; 23-28
Color And COD Degradation of Procion Red Synthetic Dye by Using Fenton-TiO2 Method
Teguh, Dedi; Chemical Engineering Magister Program
Agustina, Tuty Emilia; Department of Chemical Engineering
Faizal, Muhammad; Department of Chemical Engineering
2018-02-14 14:37:02
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/89
en
Nowadays, environmental pollution caused by industrial wastewater is quite apprehensive. Most of textile industries used synthetic dyes. Procion red is one of the synthetic dyes that often used in textile industries and classified as a reactive dye that is difficult to decompose in nature and contain harmful toxins. One of the colored wastewater treatment process is by using Fenton reagent and TiO2 catalyst (Fenton-TiO2) as one of Advanced Oxidation Processes (AOPs). The objective of this research is to treat of procion red synthetic dye by using Fenton-TiO2 method and study the effect of procion red concentration, reaction time and the concentrations of TiO2 catalyst on color and COD degradation. In this experiment, the concentrations of procion red were varied between 150-300 ppm, the concentrations of TiO2 catalyst were varied from 0.05 to 0.4% (w/v) and the reaction time of 5 to 20 minutes. The optimum condition was achieved by using procion red concentration of 150 ppm with TiO2 catalyst concentration of 0.4% and reaction time of 20 minutes, which the maximum color and COD degradation of 98.67% and 92% were achieved respectively. This condition was applied to the real wastewater of textile home industry in Palembang. The color and COD degradation of 59% and 44% were found respectively after 220 minutes of reaction.
oai:ijfac.unsri.ac.id:article/140
2019-06-28T02:34:29Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/140
2019-06-28T02:34:29Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 4, No 2 (2019): June 2019; 67-71
The Effect of H-USY Catalyst in Catalytic Cracking of Waste Cooking Oil to Produce Biofuel
Rosmawati, Rosmawati; Universitas Sriwijaya
Arita, Susila; Universitas Sriwijaya
Komariah, Leily Nurul; Universitas Sriwijaya
Nazarudin, Nazarudin; University of Jambi
Alfernando, Oki; University of Jambi
2019-06-10 11:23:06
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/140
en
The crisis in petroleum is caused by the diminishing supply of petroleum resources from nature. This phenomenon encourages researchers to continue to look for processes and methods to produce energy from other resources. One of these ways is to produce energy that can be utilized from waste, including converting waste cooking oil into biofuel. This method not only could provide a source of renewable energy, but also help resolve the issue of household waste. The process used to produce biofuel from waste cooking oil is by catalytic cracking, where waste cooking oil after pretreatment is converted into biofuel in the flow reactor with H-USY catalyst. In this research, the reaction temperatures used are 400 °C, 450 °C, 500 °C and 550 °C and reaction times are 30, 45 and 60 minutes with the mass ratio of the amount of waste cooking oil to the amount of catalyst used is 40:1 (w/w). The highest yield of liquid biofuel product was obtained at 60.98%. The use of H-USY catalyst shows that the distribution of components contained in biofuel are 28.02% of diesel products (C17 -C20), 23.96% of gasoline (C6 –C12) and 7.78% of Heavy oil (C20 >) in catalytic cracking of waste cooking oil with a reaction time of 45 minutes at a temperature of 450 °C.
oai:ijfac.unsri.ac.id:article/199
2021-11-03T06:57:50Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/199
2021-11-03T06:57:50Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 6, No 1 (2021): February 2021; 14-19
Cadmium in Water Samples determined by Atomic Absorption Spectrometry after Solid Phase Extraction using DOWEX 50WX2 resin
Yuniar, Yuniar; Integrated Laboratory of Analysis, Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Sriwijaya
Nuraini, Siti; Integrated Laboratory of Analysis, Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Sriwijay
2021-02-20 20:39:22
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/199
en
Pre concentration of Cd(II) in water samples was carried out by using column solid phase extraction DOWEX 50WX2 prior to flame atomic absorption spectrometry analized. The optimum extraction conditions such as pH (5), sample flow rate (1 mL min−1), volume of eluent HNO3 1N (10 mL) and sample volume (50 mL) was determined. The limit of detections was found 0.2697 µg L−1. The accuracy was determined by analyzid spiked water samples used Cd CRM 0.1 mg L-1 traceable to SRM standard solution NIST. Percent recovery and relative standard deviation were found 93% and 6%, respectively. Conclusion this preparation method effective for determination of ion Cd (II) in water with flame-SSA..Keywords: SPE,Cd, Dowex 50WX2, Flame-SSA
oai:ijfac.unsri.ac.id:article/261
2023-05-02T04:02:33Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/261
2023-05-02T04:02:33Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 7, No 3 (2022): October 2022; 92-99
Coal Dust Characteristics and Its Association with Air Quality in Palembang Coal Unloading Station
Wahyudi, Arie; Universitas Sriwijaya
Zulkifli, Hilda; Universitas Sriwijaya
Arita, Susila; Universitas Sriwijaya
Sitorus, Rico Januar; Universitas Sriwijaya
2022-10-28 19:44:52
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/261
en
The problem of coal dust due to the accumulation and loading of coal to barges for shipping has not been studied optimally. This study aimed to investigate the characteristics of coal dust and the air quality of the three coal industries. Coal dust characteristics were tested through proximate analysis, XRD, XRF, and SEM. Meanwhile, air quality is viewed from exposure to gases that cause emissions (CO, NO2, and SO2), PM10 and TSP, humidity, and temperature. Coal dust consists of SiO2, Al2O3, and Fe2O3 as the main components with high ash. Exposure to SO2 and TSP can potentially exceed the annual threshold value.
oai:ijfac.unsri.ac.id:article/56
2018-02-20T03:15:06Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/56
2018-02-20T03:15:06Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 2, No 3 (2017): October 2017; 78-82
Nitrogen Removal by Anammox Biofilm Column Reactor at Moderately Low Temperature
Agustina, Tuty Emilia; Chemical Engineering Department
Universitas Sriwijaya
Novia, Novia; Chemical Engineering Department
Universitas Sriwijaya
Diansyah, Gusti; Department of Marine Science, Universitas Sriwijaya, Indonesia
Ike, Michihiko; Bio-Environmental Engineering Laboratory, Osaka University, Japan
Soda, Satoshi; Bio-Environmental Engineering Laboratory, Osaka University, Japan
2017-11-01 09:32:24
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/56
en
The anaerobic ammonium oxidation (anammox) as a new biological approach for nitrogen removal has been considered to be more cost-effective compared with the combination of nitrification and denitrification process. However, the anammox bioreactors are mostly explored at high temperature (>300C) in which temperature controlling system is fully required. This research was intended to develop and to apply anammox process for high nitrogen concentration removal at ambient temperature used for treating wastewater in tropical countries. An up-flow biofilm column reactor, which the upper part constructed with a porous polyester non-woven fabric material as a carrier to attach the anammox bacteria was operated without heating system. A maximum nitrogen removal rate (NRR) of 1.05 kg-N m3 d-1 was reached in the operation days of 178 with a Total Nitrogen (TN) removal efficiency of 74%. This showed the biofilm column anammox reactor was successfully applied to moderate high nitrogen removal from synthetic wastewater at moderately low temperature. Keywords: Anammox, biofilm column reactor, ambient temperature, nitrogen removal
oai:ijfac.unsri.ac.id:article/355
2024-03-13T01:45:32Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/355
2024-03-13T01:45:32Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 9, No 1 (2024): February 2024; 48-54
Integrated Wastewater Processing using Electrogoagulation Method into Oxyhydrogen (HHO) for Renewable Energy
Rusdianasari, Rusdianasari; Politeknik Negeri Sriwijaya
Taqwa, Ahmad; Politeknik Negeri Sriwijaya
Syarif, Aida; Politeknik Negeri Sriwijaya
Bow, Yohandi; Politeknik Negeri Sriwijaya
2024-02-25 22:55:03
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/355
en
Integrated wastewater is one of the contributors to wastewater that can harm the environment, thus fast industrial expansion must be followed by advancements in wastewater processing systems. Because the presence of contaminants in integrated wastewater can cause several issues for persons and the environment, integrated wastewater processing is required. One type of integrated wastewater processing is the production of hydrogen gas as a new and sustainable energy source. The electrocoagulation process may be used to convert integrated wastewater into hydrogen gas. One type of integrated wastewater processing is the production of hydrogen gas as a new and sustainable energy source. The electrocoagulation process may be used to convert integrated wastewater into hydrogen gas. In this study, oxyhydrogen (HHO) was produced from integrated wastewater utilizing two process stages: integrated wastewater processing with an electrocoagulator, followed by the process of getting HHO using an oxyhydrogen reactor. A NaOH catalyst was applied at different concentrations of 0.1 M, 0.2 M, 0.3 M, 0.4 M, and 0.5 M with an electrolysis period of 5 minutes to produce hydrogen gas. The addition of the NaOH catalyst is intended to find the optimal concentration for the production of hydrogen gas. According to the findings of the study and analysis, the optimal NaOH catalyst concentration for producing hydrogen gas is 0.5 M with hydrogen content of 346 mg/m3.Keywords: electrocoagulation, oxyhydrogen, integrated wastewater, renewable energy
oai:ijfac.unsri.ac.id:article/192
2021-05-24T04:04:41Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/192
2021-05-24T04:04:41Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 5, No 3 (2020): October 2020; 95-100
Triacylglycerols produced by biomass of endophytic fungus Neopestalotiopsis surinamensis from the Scurrula atropurpurea
https://ijfac.unsri.ac.id/index.php/ijfac/article/download/192/883
Elfita, Elfita; Sriwijaya University
Muharni, Muharni; Sriwijaya University
Mardiyanto, Mardiyanto; Sriwijaya University
Fitrya, Fitrya; Sriwijaya University
Nurmawati, Elisa; Sriwijaya University
Widjajanti, Hary; Sriwijaya University
2020-10-20 11:33:54
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/192
en
In Indonesia, Scurrula atropurpurea is a medicinal plant known as benalu. Triacylglycerols can be produced by plants, animals, algae, and microorganisms such as endophytic fungi. Triacylglycerols can be used in cosmetics, food, and medicine because they have biological activities such as antitumor, antibacterial, and cytotoxic. Besides, the compound can be used as a biodiesel substitute for triacylglycerols sourced from oil palm. This study aims to isolate and characterize triacylglycerol from biomass of endophytic fungal N. surinamensis from the S. atropurpurea leaves. The compound was isolated and purified by the column chromatography method. The structure of the compound was determined by spectroscopic data ( FTIR, 1H-NMR, and 13C-NMR). Analysis of the spectrum and compared with the literature, the isolated compound is a triacylglycerol.
oai:ijfac.unsri.ac.id:article/257
2023-05-02T03:17:29Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/257
2023-05-02T03:17:29Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 7, No 2 (2022): June 2022; 68-79
Biocoal Characterization as an Environmentally Friendly Alternative Energy Innovation Composite Variations of Gasified Char with Coconut Shell Charcoal
Yopianita, Aria; Politeknik Negeri Sriwijaya
Syarif, Aida; Politeknik Negeri Sriwijaya
Yerizam, Muhammad; Politeknik Negeri Sriwijaya
Rusdianasari, Rusdianasari; Politeknik Negeri Sriwijaya
2022-06-25 22:25:56
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/257
en
In accordance with the mandate of the Regulation of the Indonesian Minister of Energy and Mineral Resources for the use of cleaner coal through coal gasification projects, in the future the coal gasification industry will produce char as a by-product. This study aims to characterize coal gasification char using a prototype underground coal gasification (UCG) and the addition of coconut shell charcoal biomass as a raw material for making biobriquettes. By using coal as raw material from the Muara Tiga Besar Mine of PT Bukit Asam, five kinds of coal samples from different layers were obtained, which from the characterization results, both coal and char, did not have too significant deviations so that the research variables could be ignored. The results of the characterization of char from coal gasification results compared to the initial sample of coal showed an increase in calorific value, a decrease in sulfur content and a significant decrease in water content, so it can be concluded that char from coal gasification has good potential as a raw material for biobriquettes. By using char and coconut shell charcoal with the ratio of variations in the composition of char and coconut shell compositions is 100%:0%; 75%:25%; 50%:50%; 25%:75% and 0%:100% carried out the briquetting process. The results of the biobriquette characterization met the criteria of the Indonesian National Standard (SNI) 01-6235-2000 and Minister of Energy and Mineral Resources regulation No. 047 of 2006
oai:ijfac.unsri.ac.id:article/38
2018-02-20T04:10:02Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/38
2018-02-20T04:10:02Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 2, No 1 (2017): February 2017; 6-9
Isolation of Piperin from The Fruit of Piper retrofractum
Musthapa, Iqbal
Gumilar, Gun Gun
2017-03-06 09:38:41
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/38
en
This paper will described the isolation of major compound from MeOH extract from the fruit of Piper retrofractum. Using several chromatography technique including liquid vacuum chromatography and thin layer chromatography, and further purification using re-cristalization technique, Piperine, an alkaloids compound, was isolated from this extract. The structure of this compound was determined using spectroscopic methods including FTIR, 1D-NMR and 2-D NMR.Keywords : P.retrofractum, alkaloids, piperine, structure elucidation
oai:ijfac.unsri.ac.id:article/333
2023-10-06T02:38:31Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/333
2023-10-06T02:38:31Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 8, No 3 (2023): October 2023; 120-125
Integration of Internet of Things (IoT) on Web-based Chemistry Learning
Filantropie, Annisa; Sriwijaya University
Suheryanto, Suheryanto; Sriwijaya University
Hariani, Poedji Loekitowati; Sriwijaya University
2023-10-06 09:37:37
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/333
en
The development of science and technology, especially the development of the internet is very rapid today. The world of education, needs to develop learning innovations involving the internet. Internet of Things is one of the innovative technologies that can connect a device or object into a large data base so as to speed up the information process through the power of the internet network. The application of the Internet of Things in high school chemistry learning, especially in the concentration cell potentiometry method, can be used in practicum in school laboratories. The results showed that the combined method of concentration cell potentiometry integrated with the Internet of Things (Pot-IoT) has been proven effective (n-gain = 0.7208) to be used as a learning medium for the practicum of measuring Pb metal in water samples at school.
oai:ijfac.unsri.ac.id:article/116
2019-02-13T03:38:32Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/116
2019-02-13T03:38:32Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 4, No 1 (2019): February 2019; 9-14
Performance of Silica Membranes from Fly Ash Coal of PT Semen Baturaja in Reducing Metal Content in Mine Acid Water
Trisnaliani, Lety; Chemical Engineering Department
D-IV Energy Engineering
State Polytechnic of Sriwijaya
Purnamasari, Indah; Chemical Engineering Department
State Polytechnic of Sriwijaya
Ahmadan, Fatria; Chemical Engineering Department
State Polytechnic of Sriwijaya
2019-02-13 10:38:31
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/116
en
Mine acid water has a high level of acidity as a result of oxidation of rocks containing pyrite and sulfide minerals from the remains of rocks exposed to oxygen in the water, which usually contain high metal content. One way to reduce the metal content in acid mine water is to use a silica membrane. In the study, silica membranes were made by extracting silica from fly ash by using two types of solvents or extractors, namely HCl and HNO3. The adsorption time are 100 minutes, 120 minutes, and 140 minutes with the aim to find out which extractors can produce membranes with performance good and optimum time in the absorption of metal content from acid mine drainage. SEM analysis shows that there is no pore formed on the membrane. Based on the results of the analysis of the research conducted, it can be seen that the membrane with HCl extractor can work better in reducing metal content with optimum adsorption time in the 140th minute. Acid mine drainage also experienced a decrease in flux from 14.9283 L / m2 hours to 6.8244 L / m2h for the membrane with HCl extractor and for HNO3 membrane decreased from 11.9427 L / m2h to 7.6774 L / m2h. Keywords: Silica Membranes, Fly Ash Coal, Metal Content, Mine Acid Water, extractor
oai:ijfac.unsri.ac.id:article/167
2020-12-02T06:47:14Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/167
2020-12-02T06:47:14Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 5, No 1 (2020): February 2020; 7-12
Application of Nanosilica from Rice Husk Ash as Iron Metal (Fe) Adsorbent in Textile Wastewater
Rusdianasari, Rusdianasari; Politeknik Negeri Sriwijaya
Taufik, Muhammad; Politeknik Negeri Sriwijaya
Bow, Yohandri; Politeknik Negeri Sriwijaya
Fitria, Maryam Seyaski; Politeknik Negeri Sriwijaya
2020-02-17 13:43:04
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/167
en
Heavy metals are considered hazardous to health if they accumulate excessively in the body. One way to remove iron metal ions by adsorption process uses adsorbents. In this study, removal of heavy metals such as ferrous metal (Fe) was adsorbed using an adsorbent in the form of nanosilica. Nanosilica is made from rice husk ash where rice husk ash contains 80-90% silica so that it can be utilized as a raw material in nanosilica synthesis. Synthesis of nanosilica was carried out using a solvent in the form of KOH with a variation of 1.5M concentration; 2.5M; 3.0M; 3.5M and 4.5M. The five types of nanosilica were applied to textile waste containing ferrous metal (Fe) with variations in a contact time of 5, 10, 15, 20, and 25 minutes. Waste containing iron metal that has been adsorbed was analyzed by atomic absorption spectrophotometry (AAS) to see the remaining iron content. From the analysis of AAS produced the smallest iron concentration of 0.186 ppm in nanosilica with 1.5 M KOH solvent. Nanosilica with 1.5M KOH solvent was characterized using a Scanning electron microscopy (SEM) -Energy Dispersive X-ray (EDX) tool to obtain a surface morphological size of 0.44 µm with 28.95% SiO2 content.
oai:ijfac.unsri.ac.id:article/238
2022-02-03T08:34:25Z
ijfac:ART
ec_fundedresources
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/238
2022-02-03T08:34:25Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 6, No 3 (2021): October 2021; 115-121
Synthesis NiFe2O4 Nanoparticles by co-Precipitation Method for Degradation of Congo Red Dye
Nurmayansih, Astri; Sriwijaya University
Hariani, Poedji Loekitowati; Sriwijaya University
Said, Muhammad; Sriwijaya University
2021-10-20 21:56:26
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/238
DIPA of Sriwijaya University 2021. SP DIPA-023.17.2.677515 /2021, On November 23, 2020. In accordance with the Rector's Decree Number: 0014/ UN9/ SK.LP2M.PT/2021, On Mei 25, 2021
en
The NiFe2O4 nanoparticle was synthesized using co-precipitation method. This study done to the purpose for get the photocatalyst magnetic. The product of NiFe2O4 nanoparticles were characterized by XRD, FTIR, SEM EDS and UV DRS instrumentation. The result of characterization NiFe2O4 nanoparticles was showed a sharp intensity peak at 2θ of 35.73o. The characterization using FTIR was showed the absorption band of Ni-O metal oxide at 779.24 cm-1 and the absorption band of Fe-O metal oxide at 694.37 cm-1. Characterization using SEM-EDS showed the NiFe2O4 nanoparticles have agglomeration because the nanoparticles possess high surface energy. The composition element of NiFe2O4 nanoparticles was 47.84% O, 15.37% Fe, and 9.89% Ni. Meanwhile, the result of characterization using UV DRS was showed sharp peak intensity of wavelength at 319 nm. The band gap energy of NiFe2O4 nanoparticles with direct transition in 1.11 eV and indirect transition in 1.98 eV using Tauc method. Then, the result of photodegradation toward congo red was showed effectively at the concentration in 100 mg/L, the contact time in 25 minutes and the pH in 6 or pH 5,7 with removal effectivity was 71.104%.
oai:ijfac.unsri.ac.id:article/12
2018-02-20T04:27:21Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/12
2018-02-20T04:27:21Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 1, No 2 (2016): June 2016; 47-51
Modification of Cellulose with 4.4 Diaminodiphenylether-O-Hydroxibenzaldehide as Adsorbent and Its Application for Adsorbing Metalic Ion of Cd2+ In Aqueous Solution
HIdayati, Nurlisa
Mohadi, Risfidian
Marsitho, Euis
Fatoni, Ahmad
2016-06-12 00:00:00
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/12
en
This research on the modification of cellulose using 4,4-diaminodiphenylether and o-hydroxybenzaldehyde and its application to adsorb Cd2+ in aqueous solution has been done. The adsorption studies of cellulose and modified cellulose were done by using batch technique. The cellulose and modified cellulose were characterized by FTIR. The FTIR spectra revealed characteristic bands of 1573 cm-1, 1280 cm-1, 3749 cm-1 and 1056 cm-1. It indicates function group of C=N, C=O, O-H and Si-OR bond, respectively. The FTIR spectra of cellulose and modified cellulose which interacted to Cd2+, it were indicated by the shift in wavenumber 3410 cm-1 to 3371 cm-1. This spectral shift indicating Cd2+ bound to OH-group. In this research, interaction between modified cellulose with Cd2+ confirmed by intensities spectral changes at 1620 cm-1. The adsorption capacity and energy from adsorption of Cd2+ ions toward cellulose were 71,43 mg/g and 4,142 kJ/mol, while toward modified cellulose were 55,56 mg/g and 0,13 kJ/mol, respectively. Keywords: cellulose, 4,4-diaminodiphenylether-o-hydroxybenzaldehyde, adsorption, Cd2+
oai:ijfac.unsri.ac.id:article/310
2023-06-27T14:21:49Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/310
2023-06-27T14:21:49Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 8, No 2 (2023): June 2023; 63-69
Antibacterial Compound from n-Hexane Fraction of Dillenia ochreata Leaves
Yohandini, Heni; Department of Chemistry Sriwijaya University
Muharni, Muharni; Department of Chemistry Sriwijaya University
Candra, Putra Setia Aji; Department of Chemistry Sriwijaya University
2023-06-27 21:18:54
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/310
en
Semprawang (Dillenia ochreata) belongs to the Dilleniaceae family that has been used by the Musi tribe, Banyuasin, South Sumatra, for scurvy medicine. This study aims to isolate secondary metabolites from D. ochreata leaves n-hexane extract and test their antibacterial activity against Escherichia coli and Staphylococcus aureus. The D. ochreata leaves were extracted through the maceration method with n-hexane solvent, and the isolated compounds were purified using column chromatography. The isolated compounds were analyzed using FT-IR, 1H-NMR, and 13C-NMR spectroscopy and compared the spectroscopic data with the literature. The antibacterial activity was determined against the E. coli and S. aureus bacteria with the disc diffusion method and MIC value was determined by the microdilution method. Based on the analysis of the spectroscopic data and compared with literature data, it is suggested that the isolated compounds are 3β-glucopyranosyl-lup-20(29)-en-28-oic, which mixes with aromatic compound. The isolated compounds showed antibacterial activity with a minimum inhibitory concentration (MIC) to E. coli at 120 µg/mL and S. aureus at 60 µg/mL
oai:ijfac.unsri.ac.id:article/99
2018-07-12T03:04:04Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/99
2018-07-12T03:04:04Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 3, No 2 (2018): June 2018; 54-58
Assessment of Ogan River Water Quality Kabupaten OKU South Sumatera by NSFWQI Method
Yulistia, Eriyana; Environmental Management Program, Graduate Program, Universitas Sriwijaya
Fauziyah, Fauziyah; Department of Marine Science, Faculty of Mathematics and Natural Science, Universitas Sriwijaya
Hermansyah, Hermansyah; Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Sriwijaya
2018-06-04 21:33:59
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/99
en
A Study of physicochemical and microbiology analysis in Ogan River Kabupaten Ogan Komering Ulu was carried out in Mei-Juny 2016. The purpose of this study was to determine the water quality status of Ogan River by using National Sanition Foundation Water Quality Index. Water quality status was studied at six selected stations to represent different localities with varying anthropogenic discharge. Water samples were taken by purposive sampling method. Physicochemical and microbiology parameters of samples were measured pH, temperature, Turbidity, Total Suspended Solids, Dissolved Oxygent, Biochemical Oxygent Demand, Nitrat, Phospate, and Fecal Coliform following standard method. The river water quality status is medium, the value ranged 56-57. Based on these indices it is concluded that the anthropogenic activies along Ogan River effected quality of water Ogan River.
oai:ijfac.unsri.ac.id:article/156
2019-10-22T08:10:26Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/156
2019-10-22T08:10:26Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 4, No 3 (2019): October 2019; 91-103
Chemometric Assessment of Orashi River after Confluence with Oguta Lake
Ebere, Enyoh Christian
Wirnkor, Verla Andrew; Group Research in Analytical Chemistry, Environment and Climate Change (GRACE & CC), Department of Chemistry, Faculty of Science, Imo State University Owerri, P. M. B 2000, Imo State, Nigeria
Ngozi, Verla Evelyn; Department of Environmental Technology, Federal University of Technology, Owerri, Imo State, Nigeria
Okeke, Peter Ndu; Department of Environmental Technology, Federal University of Technology, Owerri, Imo State, Nigeria
Pingale, Shirish S; Department of Chemistry, Gramonnati Mandals, Arts, Commerce and Science College Narayangaon, Junnar, Pune 410504, Maharashtra, India
2019-10-10 20:20:20
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/156
Group Research in Analytical Chemistry, Environment and Climate Change (GRACE&CC)
en
This study was carried out to evaluate the surficial water and sediment of Orashi River after confluence with Oguta. A total of 50 sub-samples were collected for the two media and were homogenized to form 10 composite samples (5 each). Water and sediment samples were analyzed for heavy metals concentrations and physico-chemical parameters. Data obtained was interpreted using ten chemometric models and standards of the Federal Ministry of Environment as touchstone values. Approximately 100 % of water samples were contaminated as opposed to 40 % of sediment samples. Both water and sediments showed that Cd as the highest contaminant with contamination factors of 38 and 1.52 respectively. Water revealed pollution load index higher than sediment probably due to its dissolution ability to metals. Geo accumulation index was observed to have highest value for Cd (45) at point A while Fe (> 4) at all points and same time the highest negative value. All points exhibited very high ecological risk (RI; 1112.7–1473.9) for water while sediments at those points showed low (RI < 150). The water quality index (WQI) ranged from 1633.33–2275.57 with a minimum deviation of 1910 % from WQI (100) adjudged to be unsuitable for consumption. The exchangeable sodium percentage (ESP) for all sampling sites ranged from 0.17-0.25 % suggesting good water for irrigation purposes. There was low sodium absorption ratio (SAR) and cation ratio of structural stability (CROSS) for the river water showing that it is good for irrigation. The sediment quality index was all less than 1 indicating no pollution of sediment. Transfer factors followed the order As>Cd>Ag>Cr>Fe>Cu>Mn>Co>Ni. In conclusion, the water was polluted but good for irrigation use. However, continuous use could lead to health problems due to bioaccumulation of metals while sediments were generally not polluted and of good quality
oai:ijfac.unsri.ac.id:article/219
2022-02-03T07:55:21Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/219
2022-02-03T07:55:21Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 6, No 2 (2021): June 2021; 59-63
Hydrogen Adsorption/desorption on lithium Alanat Catalyzed by Ni/C for Sustainable Hydrogen Storage
Amelia, Icha; 1. Master Program, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Sriwijaya, Jl. Padang Selasa no. 524, Bukit Lama, Ilir Barat, Palembang, Indonesia 30121
2. Center of Excellent fuel cell and hydrogen, Sriwijaya Univercity, South Sumatera, 30128.
Rohendi, Dedi; 1. Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya Univercity, South Sumatera, 30128.
2. Master Program, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Sriwijaya, Jl. Padang Selasa no. 524, Bukit Lama, Ilir Barat, Palembang, Indonesia 30121
3. Center of Excellent fuel cell and hydrogen, Sriwijaya Univercity, South Sumatera, 30128.
Rachmat, Addy; 1. Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya Univercity, South Sumatera, 30128.
2. Master Program, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Sriwijaya, Jl. Padang Selasa no. 524, Bukit Lama, Ilir Barat, Palembang, Indonesia 30121
3. Center of Excellent fuel cell and hydrogen, Sriwijaya Univercity, South Sumatera, 30128.
2021-06-18 21:01:33
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/219
Directorate General of Higher Education of Ministry of Education and Culture
en
LiAlH4 alloy has been believed to have the potential to become one of the hydrogen storages with high storage capacity. In this research, the formation of LiAlH4 alloys with dope and undope Ni/C catalysts and characterization and testing of hydrogen adsorption/desorption capacities using these alloys have been carried out. The alloy was made by the milling method and the resulting alloy was characterized using XRD analysis. The adsorption capacity test of the alloy was carried out by the gravimetric method at various pressures. The adsorption capacity of the LiAlH4 alloy by adding additives in the form of Ni/C as much as 5%w/w was proven to increase the hydrogen adsorption capacity compared to undope a catalyst with the highest storage capacity at a pressure of 3 bar of 13.06%w/w compared to undope a catalyst of 9.84%w/w at the same pressure. Meanwhile, the highest hydrogen desorption capacity was 53.56% w/w (dope catalyst) and 41.75% w/w (undope catalyst).
oai:ijfac.unsri.ac.id:article/45
2017-09-15T14:20:28Z
ijfac:ART
oai:ijfac.unsri.ac.id:article/273
2023-05-02T04:02:37Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/273
2023-05-02T04:02:37Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 7, No 3 (2022): October 2022; 136-142
Standardization in ethanolic extract of Paronema canescens leaves
Rizal, Dirli Fahmi; Master Program of Chemistry, Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Sriwijaya, Indralaya, Ogan Ilir, South Sumatra, 30662 Indonesia
Muharni, Muharni; Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Sriwijaya, Indralaya, Ogan Ilir, South Sumatra, 30662 Indonesia
Yohandini, Heni; Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Sriwijaya, Indralaya, Ogan Ilir, South Sumatra, 30662 Indonesia
Ferlinahayati, Ferlinahayati; Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Sriwijaya, Indralaya, Ogan Ilir, South Sumatra, 30662 Indonesia
2022-10-28 19:45:16
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/273
en
The development of traditional medicinal plants as raw materials for herbal drugs needs to be standardized. The aim of the research was to standardise ethanol extract of Paronema. canescens leaves. The extract was determined specific and non-specific parameters. The organoleptic of extract has a thick consistency, the colour dark brown has a characteristic non-aromatic odour, and has a slightly bitter taste. The soluble content in water and ethanol of 48.1% and 80. 3%, respectively. The extract contains triterpenoid compounds, steroids, flavonoids and phenols with water content was 8.33%, total ash content of 5.36%, acid insoluble ash content of 2.16%, drying shrinkage of 8.0%, specific gravity of 1.255 g/ml, metal contamination Pb < 0.0628 mg/g, Cd 0.0077 mg/Kg and Cu 0.00282 mg/g, total bacterial of 0.9 x 101 colonies/g and mould contamination with a value of 0.15 x 101 colonies/g, respectively. Based on the data, all the parameters were measured to meet the standardKeywords: Paronema canescens, standardised, specific parameter, non specific parameter
oai:ijfac.unsri.ac.id:article/82
2018-02-18T14:00:49Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/82
2018-02-18T14:00:49Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 3, No 1 (2018): February 2018; 1-6
Utilization of Electrolyte Solution in Nanotube Formation on Ti-6Al-4V Metal Alloy
Charlena, Charlena; Department of Chemistry, FMIPA IPB
Kemala, Tetty; Department of Chemistry, FMIPA IPB
Wulanawati, Armi; Department of Chemistry, FMIPA IPB
2018-02-11 12:40:31
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/82
en
Formation of nanotube morphology on the surface of Ti-6Al-4V metal did not occur homogeneously, so when it was coated with hydroxyapatite, it did not merge well. One of the factor that affected the inhomogeneously formed nanotube was the utilization of electrolyte solution. The research has been done to observe the effect of electrolyte solution in the formation of nanotube morphology on the surface of Ti-6Al-4V metal alloy. Electrolyte solution that was used was ethylene glycol, HF, and NH4F with time variation of an hour, 2 hour, and 3 hour. Formation of nanotube morphology on the surface of Ti-6Al-4V metal alloy was done using anodization process. The result showed that in HF electrolyte solution which was anodized for an hour ɑ and β phase that composed Ti-6Al-4V metal alloy was formed, meanwhile when using electrolyte solution of ethylene glycol + NH4F for 2 hours showed that there were pores that opened on Ti-6Al-4V metal alloy surface. Nanotube morphology on the surface of Ti-6Al-4V metal alloy was formed using electrolyte solution of ethylene glycol + NH4F which was anodized for 3 hours.
oai:ijfac.unsri.ac.id:article/196
2021-05-24T04:04:41Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/196
2021-05-24T04:04:41Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 5, No 3 (2020): October 2020; 88-94
Synthesis of SnO2-Fe3O4 Nanocomposites using Hydrothermal Method
Rizki, Widya Twiny; Sriwijaya University
Hariani, Poedji Loekitowati; Sriwijaya University
Rachmat, Addy; Siwijaya University
Said, Muhammad; Sriwijaya University
Hairom, Nur Hanis Hayati; University Tun Husein Onn
2020-10-20 11:33:50
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/196
en
Synthesis of nanocomposite SnO2-Fe3O4 using the hydrothermal method was conducted in this study. The purpose of this study was to determine the best mass ratio in the synthesis of SnO2-Fe3O4. Nanocomposite SnO2-Fe3O4 were made with mass ratio (1:1), (1:2) and (2:1) were characterized using XRD and FTIR. The result of SnO2 characterization using XRD analysis was showed a sharp intensity peak at 2 = 26.5. The result of Fe3O4 characterization using XRD analysis was showed a sharp intensity peak at 2 = 35.86. The XRD characterization result of SnO2-Fe3O4 (1:2) 2 = 26.74 and 34.08. Based on the XRD characterization, it can be concluded the best mass ratio for SnO2-Fe3O4 was (1:2). Characterization nanocomposite SnO2-Fe3O4 using FTIR showed the absorption band at 590 cm-1 is a characteristic peak of Sn-O and the absorption band at 563 cm-1 corresponds to Fe-O.
oai:ijfac.unsri.ac.id:article/246
2023-05-02T03:23:20Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/246
2023-05-02T03:23:20Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 7, No 2 (2022): June 2022; 80-85
Processing Mixture of Polypropylene (PP) Plastic Waste and Palm Fiber Waste into Alternative Fuels
Rif'ah, Ibnatun; Universitas Jambi
Rosyani, Rosyani; Universitas Jambi
Nazarudin, Nazarudin; 1) Master of Enviromental Study Program, University of Jambi, Jambi, Indonesia
2) Chemical Engineering, FST, University of Jambi, Jambi, Indonesia
3) Energy and Nano Material Centre, LPPM, Universitas Jambi, Jambi, Indonesia
2022-06-25 22:26:01
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/246
4) Center of Excellent on Bio-Geo Material and Energy, Universitas Jambi, Jambi , Indonesia
en
AbstractThe increasing accumulation of plastic and industrial biomass wastes, as well as the declining reserves of petroleum as an energy source, have become significant topics of discussion. Therefore, this research aims to determine alternative energy sources in the form of fuel derived from cracking a mixture of Polypropylene (PP) plastic and palm fiber (SKS) waste. It also aims to determine the quantity and quality of the derived products. The cracking process with a catalyst to feed ratio of 1:10 and a time of 40 minutes led to the highest % conversion Cracking Result Liquid (CHP) product of 48.08% with the variation condition of PP to SKS ratio of 1.5:1 at a temperature of 500°C. The GC-MS analysis results showed that the % area of the CHP product contains fuels, such as gasoline (32.97%), kerosene (5.36%), and diesel (2.24%).Keywords: Cracking, Polypropylene, plastic waste, palm fiber, alternative energi Abstrak (Indonesian)Meningkatnya akumulasi limbah, baik itu sampah plastik maupun limbah biomassa hasil industri, serta menurunnya cadangan minyak bumi sebagai sumber enegi, menjadi topik masalah yang cukup signifikan untuk dibahas dan dicarikan solusinya. Penelitian dilakukan dengan tujuan mencari sumber energi alternatif berupa bahan bakar yang berasal dari perengkahan campuran sampah plastik jenis PP (Polypropylene) dan limbah biomassa serabut kelapa sawit (SKS), serta mengetahui kuantitas dan kualitas produk yang dihasilkan. Perengkahan yang dilakukan dengan perbandingan katalis dan umpan 1:10 dan waktu 40 menit, menghasilkan %konversi produk CHP (Cairan Hasil Perengkahan) tertinggi sebesar 48,08% dengan kondisi variasi rasio PP:SKS adalah 1,5:1 dan suhu 500°C. Hasil analisa GC-MS menunjukkan % area produk CHP tersebut mengandung bahan bakar seperti bensin (32,97%), minyak tanah (5,36%) dan solar (2,24%). Kata Kunci : Perengkahan, Polypropylene, sampah plastik, serabut kelapa sawit, energi alternatif
oai:ijfac.unsri.ac.id:article/49
2018-02-20T03:36:18Z
ijfac:ART
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https://ijfac.unsri.ac.id/index.php/ijfac/article/view/49
2018-02-20T03:36:18Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 2, No 2 (2017): June 2017; 39-46
Study on Quality of Water from Various Resources of Tidal Zonetaken on Dry Season at Muliasari Village Tanjung Lago District
Hamida, Indah; Sriwijaya University
Susanto, Robiyanto Hendro
Hariani, PoedjiLoekitowati
2017-10-05 10:25:54
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/49
en
Contamination by organic matters, nutrient, pathogenic bacteria, micro pollutant and detergent/surfactant caused quality decrease of water in tidal zone. This study was aimed to evaluate quality of various water resources and to elaborate correlation between tidal environment condition and water resources quality at Muliasari village district of Tanjung Lago. Water sample was taken by purposive sampling method. Analysis result using Storet method showed average value of several parameters at high tide are: temperature 31.37°C;TSS 74.28 mg/L;pH 3.38; salinity 1.82; DO 5.05 mg/L; BOD 32.51 mg/L; COD 98.5 mg/L; ammonia 0.29 mg/L; phosphate 0.1690 mg/L; Fe 0.272 mg/L and Coliform 0.31/100 mg/L. At low tide these parameters had values for temperature 27.13°C; TSS 67.14 mg/L; pH 3.38; salinity 1.7; DO 4.86 mg/L; BOD 14.13 mg/L; COD 43.71; ammonia 0.244 mg/L; phosphate 0.1695 mg/L; Fe 0.232 mg/L and Coliform 0.32/100 mg/L. According to Governor’s provision no.16/2005 on water quality standard, water from various resources of Muliasari village were moderately polluted. Domestic waste water management is needed at this area followed by training and enhance occupant’s awareness to maintain hygiene and environment quality. Monitoring effort is also necessary on water resources quality for at least once every 6 months. Key words: Water quality, tidal zone, domestic waste
oai:ijfac.unsri.ac.id:article/341
2024-03-13T01:33:07Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/341
2024-03-13T01:33:07Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 9, No 1 (2024): February 2024; 18-25
Potential of Dimethyl Sulfoxide Modified Kaolin and Cetyl Trimethylammonium Bromide as Amoxycillin Adsorben
Wardani, Gatut Ari; Universitas Bakti Tunas Husada
Damayanti, Ratih; Universitas Bakti Tunas Husada
Fathurohman, Mochamad; Universitas Bakti Tunas Husada
Hidayat, Taufik; Universitas Bakti Tunas Husada
Nofiyanti, Estin; Universitas Muhammadiyah Tasikmalaya
2024-02-25 22:54:43
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/341
en
The large use of amoxicillin allows this antibiotic to enter the environment in large quantities and cause pollution. The adsorption technique can be used as a method to remove amoxicillin contaminants in wastewater by utilizing kaolin as an adsorbent. This study aims to determine the characteristics of kaolin as an adsorbent and determine the ability of kaolin to adsorb amoxicillin. Kaolin was activated with hydrochloric acid and modified using Dimethyl sulfoxide (DMSO) and cetyl trimethylammonium bromide (CTAB). The results showed that the characteristics of DMSO and CTAB-modified kaolin showed a new peak which was an O-H bending vibration in functional group analysis using FTIR. X-ray diffraction results show that the distance between planes in the kaolin structure is larger. Meanwhile, the results of the SEM analysis showed that the surface morphology of kaolin had a higher level of crystallinity than before which proved an increase in the adsorption capacity of kaolin. The adsorption kinetics follows the Santosa kinetic equation model with an adsorption rate of 0.004 min-1 and an equilibrium constant value of 0.007 L.mol-1. The adsorption isotherm test follows the Freundlich isotherm equation model with an adsorption constant value of 561.694 L.mg-1 and an empirical constant value of 0.270. Keywords: Antibiotics, Adsorption, Batch, Isotherms, Kinetics
oai:ijfac.unsri.ac.id:article/121
2019-02-13T03:38:32Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/121
2019-02-13T03:38:32Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 4, No 1 (2019): February 2019; 29-34
Pyrolysis of Vacuum Residue By Thermal and Catalytic Cracking Using Active Alumina Catalyst
https://ijfac.unsri.ac.id/index.php/ijfac/article/download/121/0
Yunanto, Isnandar; Sriwijaya University
Haryati, Sri; Sriwijaya University
Bustan, Muhammad Djoni; Sriwijaya University
2019-02-13 10:38:32
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/121
en
Vacuum Residue as feedstock derived from Pertamina Refinery Unit III was cracked in a fixed batch reactor under thermal and catalytic with single stage pyrolysis process using active alumina oxide (Al2O3) as a catalyst. The catalytic pyrolysis process carried out at a temperature 450°C in the presence of a varied catalyst to feed ratio 0.5-2.5 w/w% and varied of reaction times 5-30 minutes. While the thermal process performed under same operating conditions without presence the catalyst. The effect of alumina catalyst ratio on quantity and quality of yield product, the effect of operating conditions (reaction times) on yield distribution has been investigated. As a result, the cracked products are liquid, gas and coke residue. The yield of liquid products was dominant, the highest catalyst ratio showed the highest yield of the liquid product reached 63.1 wt% and the lowest yield of coke residue by 24.75 wt%. The highest yield of gas by 23.9 wt% was found at minimum catalyst used by 0.5 wt%
oai:ijfac.unsri.ac.id:article/184
2021-05-24T03:24:49Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/184
2021-05-24T03:24:49Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 5, No 2 (2020): June 2020; 35-41
Mercury Analysis of Body Lotion Cosmetic Using CVAAS Method: Case Study of Distributed Product in Banda Aceh
Safitri, Eka; Universitas Syiah Kuala, Banda Aceh
Irmawati, Irmawati; Universitas Syiah Kuala, Banda Aceh
Suhud, Khairi; Universitas Syiah Kuala
Islami, Nurul; Mathematics Department, STKIP Bina Bangsa Getsempena, Banda Aceh.
2020-06-20 17:32:50
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/184
en
The aim of this work is to determine the concentration of mercury in body lotion from several brands that are available in Banda Aceh. This research expected to provide information for the public and government related to the negative effects of harmful cosmetics that widely circulated. This information is useful into consideration of policy-making and monitoring the use of Hg metal. This study determined the type of body lotion cosmetics containing Hg metal by using Cold Vapor Atomic Absorption Spectroscopy (CVAAS) method. There are 22 samples and 11 of them have been selected by purposive sampling. The standard Hg calibration curve produces a linear line with the equation y = 0.0874x + 0.0729, and the correlation coefficient (R2) value of 0.9726. LOD value is 0.004854 ppb, and LOQ is 0.01681 ppb. The positive results were obtained from samples code TB3= 0.046, TB6= 0.01, and TB13= 0.004 ppb respectively. These results indicated the mercury level was still lower than 1 mg/L the threshold by drug and food control centers (BPOM).
oai:ijfac.unsri.ac.id:article/233
2022-11-07T08:00:36Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/233
2022-11-07T08:00:36Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 7, No 1 (2022): February 2022; 16-20
Production of Bioethanol from Sugarcane Bagasse with Variations in Yeast Mass
Gunawan, Hery; Universitas Muhammadiyah Palembang
Yusmartini, Eka Sri; Universitas Muhammadiyah Palembang
Elvidiah, Elvidiah; Universitas Muhammadiyah Palembang
2022-02-20 22:09:27
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/233
en
Energy availability is an absolute requirement in national development efforts at present or in the future. The existence of limited energy sources, while the need continues to increase requires alternative sources of fossil energy. Bioethanol is one of the bioenergy which is an alternative to replace the use of fossil fuels. This research aims to obtain bioethanol by utilizing bagasse as raw material. The manufacture of bioethanol consists of several stages, among others, preparation of raw materials by drying bagasse and then mashing it to obtain bagasse with a size of 100 mesh, thermal hydrolysis process with the help of sulfuric acid solution with varying concentrations, fermentation process carried out with the help of yeast, distillation process, and content analysis. ethanol. The method used is hydrolysis with sulfuric acid. Furthermore, the hydrolysis with sulfuric acid at 150 oC for 1 hour to form a slurry. The fermentation process uses a mass variation of yeast Saccharomyces Cerevisiae with a variation of 6.75, 8.75, 11.25, 13.75, and 16.25 g for 4 days with pH 5, room temperature and anaerobically. The best bioethanol content in the study with a mass variation of the yeast Saccharomyces Cerevisiae with a pH of 5 and a fermentation time of 4 days was 98.93% with a yield of 57.6 mLKeywords: Bagasse, Bioethanol, Saccha sromyces cereviceae, Yeast mass, Fermentation
oai:ijfac.unsri.ac.id:article/27
2018-02-20T04:33:14Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/27
2018-02-20T04:33:14Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 1, No 3 (2016): October 2016; 67-71
Removal of COD and TSS From Dye Solution Using Sand Filtration and Adsorption
Juniar, Heny; Department of Chemistry Sriwijaya University
Said, Muhammad
Haryati, Sri
Faizal, Muhammad
2016-11-17 04:49:49
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/27
en
Abstract: This research was conducted in order to obtain proper compositions and the standard condition for the simple filtration equipments and optimum operational conditions in adsorption column. The research was carried out by analyzing parameters COD and TSS. The result showed that the process was able to reduced parameters observed from filtration step until the process in adsorptions column. The optimum conditions for sand filter equipment were 10 cm sand height, at least 7 cm fibers, 3-4 cm gravel. In the adsorption column, the optimum conditions for green waste water were flow rate at 40 ml/min 60 min adsorptions time, and 60 cm bed height. While purple for waste water; 20 mL/min of flowrate, 60 min of adsorption time, and the 60 cm of bed heightKey words: dye solution, COD, TSS, sand filtration, adsorption column Abstrak (Indonesian): Penelitian mengenai pengolahan limbah cair hasil pencelupan benang songket dengan metode filtrasi dan adsorpsi telah dilaksanakan. Penelitian bertujuan untuk mendapatkan komposisi dan ukuran yang tepat bagi alat penyaring sederhana dan mendapatkan kondisi operasi yang tepat bagi kolom adsorpsi. Parameter pengamatan adalah kadar COD dan TSS. Hasil penelitian menunjukkan bahwa telah terjadi penurunan kadar limbah sejak tahap penyaringan hingga proses di kolom adsorpsi. Kondisi optimum alat penyaring sederhana adalah ketebalan pasir 10 cm, ijuk minimal 7 cm, kerikil 3-4 cm dan penambahan tawas sebanyak 2g/L limbah. Pada kolom adsorpsi kondisi optimum adalah kecepatan alir 40 mL/menit, waktu tinggal di kolom 60 menit dan ketinggian unggun batubara 60 cm.Kata kunci: limbah cair pencelupan, bahan-bahan berbahaya, filtrasi pasir, kolom adsorpsi
oai:ijfac.unsri.ac.id:article/322
2023-06-27T14:21:49Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/322
2023-06-27T14:21:49Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 8, No 2 (2023): June 2023; 98-104
Preparation of Zirconium Nitride supported on SiO2 Catalyst for Vegetable Oil Conversion
Asri, Wan Ryan; Magister Program, Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Sriwijaya, Indralaya 30662, Indonesia
Hasanudin, Hasanudin; 2. Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Sriwijaya, Indralaya 30662, Indonesia
3. Biofuel Research Group, Faculty of Mathematics and Natural Science, Universitas Sriwijaya, Indralaya 30662, Indonesia
Wijaya, Karna; 4. Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia
2023-06-27 21:19:15
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/322
en
Hydrocracking of crude palm oil (CPO) to produce biofuels was conducted over zirconium nitride supported on SiO2 (SiO2/ZrN) catalyst. SiO2/ZrN was prepared by nitriding the SiO2/Zr at 600 °C for 3 hrs under NH3 gas on the cylindrical reactor. SiO2/ZrN exhibited a surface acidity of 0.7132 mmol pyridine g‒1 with a surface area of 96 m2 g‒1, forming predominant mesopores on the catalyst. EDS-mapping analysis showed that the ZrN species exhibited a highly distributed on the SiO2 surface. CPO hydrocracking was conducted at a temperature of 500 °C for 1 hr, with a CPO flow rate of 0.02 L min‒1 and H2 flow rate of 0.03 L min‒1. The study revealed that the SiO2/ZrN successfully afforded a CPO conversion up to 94.98 wt.%, a liquid yield of 50.40 wt.%, with a low residue and coke formation. This catalyst promoted high selectivity towards bio-jet up to 72.95 wt.%.
oai:ijfac.unsri.ac.id:article/109
2018-11-28T04:54:24Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/109
2018-11-28T04:54:24Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 3, No 3 (2018): October 2018; 83-88
Purification of Crude Glycerol from Biodiesel By-product by Adsorption using Bentonite
Anzar, Erniati; Politeknik Sriwijaya
Yusi, M. Syahirman; Politeknik Sriwijaya
Bow, Yohandri; Politeknik Sriwijaya
2018-10-11 12:39:32
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/109
en
The production of glycerol from biodiesel by-product that was obtained from waste cooking oil has low purity. This crude glycerol contains impurities such as methanol, catalyst, soap and water. Analysis result shows that crude glycerol contains 67.7% water, 16.7% ash with density 1.1217 g/mL. The impurities were able to be adsorbed using bentonite which was activated in sulphuric acids 1.5 M and characterized by SEM-EDX. The purified glycerol after being treated with bentonite at 60 C for 75 minutes was fulfilled The SNI 06-1564-1995 requirement i.e. 89.5% glycerol, 4.3% water, 3.6% ash and density 1.2212 g/mL. From the experiment can be concluded the activated bentonite showed a capacity in adsorbing and removing impurities in waste cooking oil.
oai:ijfac.unsri.ac.id:article/150
2019-10-22T08:10:26Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/150
2019-10-22T08:10:26Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 4, No 3 (2019): October 2019; 126-131
The Light Transmittance and Electrical Conductivity Properties of Gelam Wood Carbon Nanosheet and Its Derivatives
Syabaniah, Nyimas Febrika; Magister of Chemistry Program, Faculty of mathematic and science, Sriwijaya University
Syarif, Nirwan; Department of Chemistry, Universitas Sriwijaya
Rohendi, Dedi; Department of Chemistry, Universitas Sriwijaya
Wandasari, Mellysa; National Center for Sustainable Transportation Technology, Bandung, Indonesia
Rengga, Wara Dyahpita; Department of Chemical Engineering, UniversitasNegeri Semarang, Semarang, Jateng, Indonesia
2019-10-10 20:20:42
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/150
Supported by USAID through Sustainable Higher Education Research Alliences (SHERA) Program
en
The research on the preparation and characterization of transparent electrode carbon nanosheet based gelam woods bark doped with SnO2-SbO2. XRD analysis showed peaks at 2θ = 26.87°; 26.38° for carbon crystal and at 2θ = 28.59°; 34.35° for SnO; at 2θ = 51.99°; 62.20° for SbO2. SEM analysis show that the carbons have self-curling sheets that indicated defection in their surface. The carbons have self-curling sheets, which indicated that their surfaces have many defects. It assumed when exfoliation process is undergone, the layers was significantly decreased as sonication process and formed rCNSO. Diffractogram XRD of CNS, CNSO and rCNSO showed diffraction peak at 2θ= 24.3°. Oxygen functional group in CNSO might cause an increasing of interlayers distance between hexagonal networks of carbon layer. It also affect electrical resistant or the conductivity. FTIR spectrum indicate that CNSO has several absorption peaks at for –OH stretch for free water and alcohol. At 2337 cm-1 was showed a carboxylic acid peaks and C=C stretch at 1627 cm-1. There is a skeletal vibration rCNSO structure occurred at each graphene layers. The ratio of the integrated intensities (IG/ID = 0.89 for CNS, 0.85 for CNS-O, and 0.93 for rCNSO of Raman spectroscopy is significantly high. Electrical conductivity of transparent electrode ranges from 1.26 x 10-7 Scm-1 – 5.03 x 10-7Scm -1. The highest conductivity value on transparent electrode contained rCNSO.This result inferred that the usage of rCNSO can increase electrical conductivity. Therefore, the higher value of electrical conductivity can be related to the value of La. The average maximum absorption wavelength is observed at 350-530 nm which means that the transition of the electronic transition π→π* occurs in the conjugated carbons system. Electrical conductivity of transparent electrode ranges from 1.26 x 10-7 Scm-1 – 5.03 x 10-7 Scm -1. The highest conductivity value on transparent electrode contained rCNSO. The band gap values in the transparent electrode range from 2 eV - 3 eV which means they have conductor – semiconductor characters.Keywords: Nanosheet, Carbon, Electrical, Conductivity, Derivate.
oai:ijfac.unsri.ac.id:article/223
2022-02-03T08:30:52Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/223
2022-02-03T08:30:52Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 6, No 3 (2021): October 2021; 81-89
The Optimum Yield of Nannochloropsis sp Microalgae from the Lipid Cultivation and Extraction Process with Soxhlet Method
Hakim, Lukmanul; Politeknik Negeri Sriwijaya
Rusdianasari, Rusdianasari; Politeknik Negeri Sriwijaya
2021-10-20 21:56:08
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/223
en
The purpose of this study was to determine the optimal growth of Nannochloropsis sp microalgae cell density observations in the cultivation process and to see the percent yield of lipids from microalgae Nannochloropsis sp. through the extraction process with the Soxhlet method using n-hexane and ethanol solvents at a ratio of 1:1, 1:2, 1:3, 1:4 and 1:5. The optimal amount of cell density during the cultivation process has obtained an average of 32,206 x 104 cells/ml on day of 9th, and the optimal lipid yield was in the ratio of hexane: ethanol 1:1 with a value of 32.13%. These results show that the optimal conditions for yield can be obtained and also has the potential as a raw material biodiesel production.
oai:ijfac.unsri.ac.id:article/7
2018-02-20T04:17:28Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/7
2018-02-20T04:17:28Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 1, No 1 (2016): February 2016; 14-18
The influence of time reaction to characteristic of methyl ester sulfonate from seed oil ketapang
Hariani, Poedji Loekitowati; Department of Chemistry Sriwijaya University
Riyanti, Fahma
Fadilah, Ahyati
2016-09-14 13:59:52
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/7
en
The aim of the present work was to The Preparation of Methyl Ester Sulfonate From Ketapang Seed Oil As Surfactant. The research is to determine the optimum condition synthesis of methyl ester sulfonate surfactant with reaction time variations (3.5; 4.0; 4.5; 5.0; 5.5 hours). The methyl ester from ketapang seed oil were analysis by GC-MS and identified methyl ester sulfonate by using FTIR spectroscopy. The methyl ester from ketapang seed oil showed containing of methyl palmitoleic, methyl linoleic, methyl palmitate, methyl stearate, methyl oleic, methyl palmitolenat and methyl eicosenoate. The optimum condition of methyl ester sulfonate at reaction time 4.5 hours with the mass of methyl ester sulfonate 34,85 g. For the FTIR spectra of sulfonate group is indicated by shifting of wave number at 1118.71cm-1 until 1029.1 cm-1. The characteristics of methyl ester sulfonate at the optimum reaction time have emulsion stability 71.684%, density 0.8714 g/mL, surface tension 36.232 dyne/cm, and maximum absorbance 1.428 at the maximum wavelength 660 nm. Keywords: Surfactant, methyl ester sulfonate, time reaction, ketapang seed oil
oai:ijfac.unsri.ac.id:article/296
2023-05-03T02:30:44Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/296
2023-05-03T02:30:44Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 8, No 1 (2023): February 2023; 34-39
Characteristic Study of Biodiesel from Used Cooking Oil using Nipah Skin Ash as a Heterogeneous Catalyst
https://ijfac.unsri.ac.id/index.php/ijfac/article/download/296/1370
Ginting, Zainuddin; Universitas Malikussaleh
Mulyawan, Rizka
Meriatna, Meriatna
Tirani, Tata
Asnadia, Asnadia
Haryono, Luthfi Mughni Anisa
2023-02-25 22:22:06
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/296
en
One type of renewable alternative energy that has great potential to be developed is biodiesel. Biodiesel is a fuel consisting of a mixture of mono-alkyl esters of long-chain fatty acids made from renewable sources such as vegetable oils or animal fats. Such as vegetable oils or animal fats. One of the vegetable oil products that can be used as feedstock for biodiesel production is used cooking oil. Used cooking oil is used oil. The purpose of this research is to study the characteristics of the effect of catalyst mass, the ratio of used cooking oil mole to methanol mole, and the effect of adding THF 1:1 co-solvent on the purity of biodiesel using heterogeneous catalyst ash derived from Nipah fruit skin calcined at 500°C for 4 hours. The process variables were transesterification reaction time 60, 90, 120, and 150 minutes, a mole ratio of methanol to oil 1:19, 1:21, and 1:23 with the addition of THF: methanol v/v 1:1 co-solvent. Biodiesel properties such as density, viscosity, moisture content, and acid number were evaluated and compared with the Indonesian National Standard (SNI). The characteristics of biodiesel were obtained with a density of 860.2 Kg/m3 and a viscosity of 2.37 mm2/s. They contained 44.14% Palmitic acid and 43.04% Octadecenoic acid (oleic), following the Indonesian National Standard (SNI). The maximum yield obtained was 93.3598% using a mole ratio of oil: methanol 1:23 at 60°C for 120 minutes, TFT 1:1, and 3% catalyst mass. The results obtained in this study indicate that heterogeneous catalysts made from kapok skin can be used to produce biodiesel. Adding TFT co-solvent can increase biodiesel production and methyl ester yield so that high purity is obtained.
oai:ijfac.unsri.ac.id:article/84
2018-06-05T02:28:04Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/84
2018-06-05T02:28:04Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 3, No 2 (2018): June 2018; 29-34
Evaluation of the Use of Cassava Based Complete Ration Silage on Nitrogen Retention and Metabolizable Energy Male Duck
Sandi, Sofia; Animal Science Study Program, Faculty of Agriculture, University of Sriwijaya
Sudarman, Asep; Department of Nutrition and Feed Technology, Faculty of Animal Science, Bogor Agricultural University
Laconi, Erika B; Department of Nutrition and Feed Technology, Faculty of Animal Science,
Bogor Agricultural University
Wiryawan, Komang G; Department of Nutrition and Feed Technology, Faculty of Animal Science,
Bogor Agricultural University
Mangunwijaja, Djumali; Department of Industrial Technology of Agriculture, Faculty of Agricultural Technology, Bogor Agricultural University
2018-06-04 21:33:39
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/84
en
The purpose of this study was to evaluate the effect of a complete ration silage made of cassava biomass nitrogen retention, and metabolizable energy male ducks. Control diet consisted of corn, rice bran, coconut meal, soybean meal, vegetable oil, fish meal and premix. While the treatment of silage ration of cassava based (BBS) consisted of leaves, peel, and tubers of cassava, as well as a mix of fish meal, vegetable oil, premix, DL-methionine and L-lysine. The experimental design used was completely randomized design with 5 treatments and 4 replicates ie S0 (100% control diet), S25 (75% control diet + 25% BBS silage), S50 (50% control diet + 50% BBS silage), S75 (25% control diet + 75% BBS silage), and S100 (100% BBS silage ration). Measurement of metabolizable energy and nitrogen retention was conducted using 25 male ducks aged 10 weeks maintained in metabolic cages and adapted to experimental diets for seven days. Ducks were fasted for 24 hours before the experimental diets were offered. Metabolizable energy and nitrogen retention were measured by the method of Sibbald (1989). The results showed that a decline in nitrogen retention and, metabolizable energy along with the increasing level of BBS silage in the rations. The conclusion of this study was the use of up to 75% BBS silage generated metabolizable energy and nitrogen retention that do not differ from the control ration.Key words: cassava silage, complete ration, male duck, metabolizable energy, nitrogen retention
oai:ijfac.unsri.ac.id:article/146
2019-06-10T04:23:26Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/146
2019-06-10T04:23:26Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 4, No 2 (2019): June 2019; 77-81
Liquid Soap Production from Catfish (Pangasius hypophthalmus) Fat Waste
Aprianti, Nabila; Sriwijaya University
Nurhayati, Siti; Sriwijaya University
Moeksin, Rosdiana; Sriwijaya University
2019-06-10 11:23:15
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/146
Analysts of Bioprocess Laboratory, Universitas Sriwijaya ; Analysts Analysis and Instrumentation Laboratory, Sriwijaya University ; Analysts the Renewable Energy Laboratory, Sriwijaya University
en
Catfish (Pangasius hypophthalmus) fat is a waste that has not been used optimally, especially in the use of soap. This study aimed to determine the effect of operating conditions are temperature, reaction time, and the ratio of volume between catfish oil and KOH. Soap can be formed by saponification reaction with strong alkali by hydrolyzing catfish oil with variations in the volume ratio of reactants (1:2, 1:3 and 1:4), temperature (75 °C and 95 °C) and reaction time (45 minutes and 75 minutes) with a constant stirring speed of 300 rpm. In the variation of the volume ratio of reactants, temperature and reaction time carried out in this study, a good liquid soap obtained is the volume ratio of reactants 1:3, temperature 75 °C and reaction time 45 minutes with pH 9.3 and free fatty acid 2.27%. The soap products produced have met SNI No. 06-4085-1996.
oai:ijfac.unsri.ac.id:article/204
2021-11-03T06:57:50Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/204
2021-11-03T06:57:50Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 6, No 1 (2021): February 2021; 20-26
Synthesis and Characterization of Amorphous TiO2 Anode Prepared by Anodizing Method for Na-ion Batteries
Indrawati, Dwi; Sriwijaya University
Syarif, Nirwan; Department of Chemistry, Faculty of Mathematic and Natural Sciences, Sriwijaya University
Rohendi, Dedi; Department of Chemistry, Faculty of Mathematic and Natural Sciences, Sriwijaya University
2021-02-20 20:39:26
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/204
en
Sodium ion battery (SIB) has engage sustainable alternative on replacing lithium ion batteries. The lower potential and larger ionic value has demanded on seeking a potential anode materials. Amorphous TiO2 prepared by electrochemical anodisation technique has provide a suitablility as anode SIB materials, which approved by conducting XRD, FTIR, and SEM-EDX measurements. Electrochemical performance was tested with variations in the concentration of NaOCl4 electrolyte in propylene carbonate (PC) solvent. Diffractogram of TiO2 showed the only peaks of Ti was observed at 2θ = 40.34. The TiO2 IR spectrogram shows that the absorption band at 507 cm-1 is the peak of the vibration characteristics of the Ti-O bond and the peak of 975 cm-1 corresponds to Ti-O-Ti bond. SEM-EDX image analysis showed the morphology of TiO2 was smooth without pore with a ratio of Ti: O elemental composition of 1: 2. Voltammogram showed the anodes in 0.5 M NaOCl4 electrolyte in PC solvent has a good stability potential windows with the high current density 1.2 mA and the capacity of 0.037 F/g
oai:ijfac.unsri.ac.id:article/262
2023-05-02T04:02:34Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/262
2023-05-02T04:02:34Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 7, No 3 (2022): October 2022; 100-105
Performance Analysis of Ceramic Membranes in Clean Water Treatment on River Water Quality
Astrada, Yogi; Postgraduate Program, Sriwijaya University
Hariani, Poedji Loekitowati; Department of Chemistry Sriwijaya University
Faizal, Muhammad; Sriwijaya University
2022-10-28 19:44:56
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/262
en
The clean water treatment process changes the physical, chemical, and biological properties of water so that it meets the requirements for use as drinking water or daily needs. The purpose of this research is to analyze the performance of ceramic membranes in processing water from the Kelekar River into clean water using an environmentally friendly microfiltration–adsorption–ceramic membrane integrated process. The research was carried out from January to April 2022 at the Chemical Engineering Laboratory of the Sriwijaya Polytechnic. The sampling location for this research is Kelekar River, Karang Raja Village, East Prabumulih. The main tools and materials are a series of water filters (microfiltration–adsorption–ceramic membrane) and river water. The analysis results show that a series of microfiltration-adsorption-ceramic membrane integrated process water treatment equipment can be used to treat river water into clean water. Based on the analysis of river water quality parameters, such as BOD5, iron (Fe), manganese (Mn), nitrate (NO3-), ammonia (NH3-N), and total coliform bacteria after water treatment were within environmental quality standards. Meanwhile, COD and nitrite (NO2-) were still not meeting the environmental quality standards set by Government Regulation of Republic Indonesia No. 22 of 2021 concerning the implementation of environmental protection and management.
oai:ijfac.unsri.ac.id:article/57
2018-02-20T03:10:39Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/57
2018-02-20T03:10:39Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 2, No 3 (2017): October 2017; 66-77
Strategy for technology energy selection to achieve coal value added in PT. Bukit Asam (Persero), Tbk.,
https://ijfac.unsri.ac.id/index.php/ijfac/article/download/57/134
https://ijfac.unsri.ac.id/index.php/ijfac/article/download/57/0
Rostiarti, Peni; Teknik Kimia Universitas Sriwidjaya
Ibrahim, Eddy; Department of Mining Engineering, Universitas Sriwijaya
Toha, Taufik
2017-11-01 09:32:25
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/57
Eddy Ibrahim, Lecturer of Sriwidjaya University
en
The role of coal in providing national energy has already increased nowadays, and still taking an important subject. Government obligation to support added value is not really encourage industry player to applied technology energy that has been developed widenly in South Africa, China and others developing country. The scope of this research is technology energy for coal diversification, such as Coal Upgrading, Coal Gasification, Coal Liquefaction, Coal Water Mixture, and applied Coal Bed Methane Technology that extract gas methane from the pore of coal. The purpose of this research is to estimate coal resources, quality range and to select technology energy that can be potentially develop in PT. Bukit Asam (Persero), Tbk. Coal Resources and coal quality in each mining licences area becomes the basic strength for developing technology energy as part of SWOT Analysis. Based on the SWOT Analysis from 5 technology energy then the scope limited into 3 highest technology energy that is Coal Gasification, Coal Liquefaction and Coal Bed Methane as the most potential technology energy to develop in PT. Bukit Asam (Persero), Tbk.
oai:ijfac.unsri.ac.id:article/345
2024-03-13T01:48:33Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/345
2024-03-13T01:48:33Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 9, No 1 (2024): February 2024; 55-65
A Study of the Effects of Alum and PAC on the Coagulation Process of Dug Well Water
Ramadhan, Finar; Universitas Tanjungpura
Maleiva, Lalak Tarbiyatun Nasyin; Universitas Tanjungpura
Nugraheni, Putranty Widha; Universitas Tanjungpura
2024-02-25 22:55:08
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/345
en
The local population of Pal IX Village in West Kalimantan heavily depends on dug wells as their main source of obtaining clean water. The prolonged consumption of elevated concentrations of manganese (Mn) and iron (Fe) in water sourced from dug wells has neurotoxic effects on both adults and children. Therefore, it is imperative to employ alum and PAC coagulants for the treatment of dug well water in order to comply with the established national quality standard. However, the utilization of both coagulants resulted in an elevation in the levels of iron (Fe), hence restricting the capacity to satisfy the quality standards. An augmentation in the mass of the coagulant is associated with a decline in the reduction efficiency. It is indicated that utilizing a mass of 0.5 grams of alum coagulant is the most favorable choice, resulting in a reduction of 50.14% for total dissolved solids (TDS), 86.25% for color, 97.70% for turbidity, and 94.48% for the concentration of Mn metal. By PAC coagulant, it has been determined that an ideal coagulant mass of 0.5 gram produces favorable outcomes with a TDS reduction of 45.08%, a color reduction of 97.71%, a turbidity reduction of 97.22%, and a Mn reduction of 95.04%. Keywords: Alum; PAC; coagulant; coagulation; dug well water
oai:ijfac.unsri.ac.id:article/190
2021-05-24T04:04:41Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/190
2021-05-24T04:04:41Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 5, No 3 (2020): October 2020; 66-70
Ammonia Liquid Waste Processing using Electrolysis Method
Trisno, Alex; magister Kimia, proggram studi kimia energi dan lingkungan, Universitas Sriwijaya
Rohendi, Dedi; Universitas Sriwijaya
Suheriyanto, Suheriyanto; Universitas Sriwijaya
2020-10-20 11:33:36
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/190
en
AbstractThis study uses an ammonia wastewater treatment system using 6 lanes and uses a batch-continuous system with electrolysis. Ammonia liquid waste content before and after electrolysis was analyzed using the Nessler method and analyzed using the Spectrophotometry method at a wavelength of 460 nm. Ammonia liquid waste with ammonia content can be used between 18,000-22,000 ppm used as a test sample. The results of this study indicate that the decrease in ammonia concentration every time is directly proportional to the amount of strong current and the number of electrode cells applied. The difference in number, by using 1 pair of cells can reduce 49.19%, 3 pairs of cells by 67.89%, and 5 pairs of cells by 85.08%. In the variation of electric current, 1; 5; 10; and 15 amperes produce 34.03%, respectively; 55.99%; 67.68% and 83.28%. On variations in the influence of the flow rate of 250; 500; 750; 1,000; and 1,250 mL/min resulting from a decrease in the concentration of ammonia is relatively the same, ie concentrations between 82% to 84%. The rate of decrease in ammonia concentration at the liquid level reaches 85.08% by using a variation of 5 pairs of electrode cells with a strong current of 15 amperes. The flow rate used is 250 mL/minute, the electrolysis process is carried out for 8 hours. The modification of the wastewater treatment system by using this electrolysis method is feasible for ammonia liquid waste treatment. Keywords: Electrolysis, modification, batch-continuous, Nessler, Spectrophotometry, ammonia liquid waste, electrode cells, current strength, flow rate, stainless steel.
oai:ijfac.unsri.ac.id:article/250
2023-05-02T03:16:32Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/250
2023-05-02T03:16:32Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 7, No 2 (2022): June 2022; 58-67
Coating of Nanotube Ti6Al4V Alloy with Hydroxyapatite-Chitosan-Polyvinyl Alcohol Composite
Charlena, Charlena; Department of Chemistry, FMIPA IPB
Kemala, Tetty; Department of Chemistry, FMIPA IPB
Ravena, Ravena; Department of Chemistry, FMIPA IPB
2022-06-25 22:25:52
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/250
en
Hydroxyapatite (HAp) can be applied as a bone implant material. HAp was composited with chitosan and polyvinyl alcohol (PVA) and coated to Ti6Al4V to improve its biocompatibility. The composite HAp-chitosan-PVA coated to anodized and unanodized Ti6Al4V. Modification of the Ti6Al4V surface by anodizing was done using a 20 V voltage. The Ti6Al4V metal alloy was coated with a composite using the electrophoretic deposition (EPD) method with a voltage of 80 V. The coated composites in Ti6Al4V nanotubes and non-nanotubes were characterized by Scanning Electron Microscope (SEM), X-Ray Diffraction (XRD), Fourier Transform Infrared (FTIR), corrosion test with potentiostat, and in vitro bioactivity test with Atomic Absorption Spectroscopy (AAS). The XRD results showed a distinctive peak indicating that the composite comprises HAp and Ti. The SEM Ti6Al4V nanotube results show a pore size of 24 nm. The FTIR results show that there were functional groups of HAp, chitosan, and PVA. The corrosion rate on Ti6Al4V nanotubes without coating was greater than with coating. The In vitro bioactivity test showed that the decrease of Ca2+ Ti6Al4V nanotube concentration was faster compared to non-nanotube Ti6Al4V.
oai:ijfac.unsri.ac.id:article/40
2018-02-20T04:11:00Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/40
2018-02-20T04:11:00Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 2, No 1 (2017): February 2017; 10-15
Application of Electrocoagulation Process for Continuous Coal Stockpile Wastewater Treatment System
Rusdianasari, Rusdianasari
2017-03-06 09:39:03
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/40
en
Coal wastewater is characterized by high total suspended solid (TSS), heavy metals, and low acidity (pH). The purpose of this study was to research the effects of the operating parameters such as applied voltage, the number of electrodes, and reaction time on a real coal stockpile wastewater in the continuous electrocoagulation process. For this purpose, aluminum electrodes were used in the presence of potassium chloride as an electrolyte. It has been shown that the removal efficiency of TSS and heavy metals content increased with increasing the applied voltage and reaction time. The results indicate that the electrocoagulation process is efficient and able to achieve 88.67% TSS removal, 95.65% ferrous removal, 99.11% manganesse removal, and pH increased until 7.1 at 24 volts during 120 min, respectively. The experiments demonstrated the effectiveness of electrocoagulation methods for the treatment of coal stockpile wastewater.Key words: coal stockpile wastewater, electrocoagulation, electrode
oai:ijfac.unsri.ac.id:article/335
2023-10-06T02:38:31Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/335
2023-10-06T02:38:31Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 8, No 3 (2023): October 2023; 126-132
Adsorption and Photocatalytic Activity of Bentonite–Titanium Dioxide on The Degradation of Methylene Blue Dyes
Said, Muhammad; Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya University
Erlangga, Niko; Universitas Sriwijaya
Alfarado, Daniel; Universitas Sriwijya
Suheryanto, Suheryanto; Universitas Sriwijaya
Nurnawati, Elisa; Universitas Sriwijaya
2023-10-06 09:37:42
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/335
en
The aim of this research is to determine the effect of bentonite-Titanium dioxide (Benonite-TiO2) composite on the degradation process of methylene blue. It was carried out by synthesizing the composite through the impregnation of Titanium dioxide (TiO2) on bentonite and then characterizing the obtained compound using XRD and SEM-EDX. The results of the XRD characterization showed that there was a shift in the diffraction angle (2θ), which indicated the success of the impregnation procedure. The morphology of the composite showed that the bentonite surface had been filled with TiO2, as evidenced by the results of the EDX analysis, which showed a 7.03% increase in Titanium. Furthermore, the degradation process was carried out using various variables, including contact time, the ratio of composite weight to dye, and by irradiation with a UV lamp at a wavelength of 352 nm UV. It was discovered that the best degradation in the concentration of methylene blue occurred at a maximum contact time of 90 minutes and at a maximum weight of 10 mg of benonite-TiO2, with an effectiveness of 99.91% after irradiation and 92.26% without irradiation.
oai:ijfac.unsri.ac.id:article/117
2019-02-13T03:38:32Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/117
2019-02-13T03:38:32Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 4, No 1 (2019): February 2019; 20-24
Leachate Treatment of TPA Talang Gulo, Jambi City by Fenton Method and Adsorption
Adriansyah, Endi; Graduate Program Student, Chemical Engineering Magister Program, Universitas Sriwijaya, Indonesia
Agustina, Tuty Emilia; Chemical Engineering Department, University of Sriwijaya
Arita, Susila; Chemical Engineering Department, University of Sriwijaya
2019-02-13 10:38:31
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/117
Graduate Program Student, Chemical Engineering Magister Program, Universitas Sriwijaya, Indonesia
en
ABSTRAKLindi adalah cairan yang ditimbulkan oleh sampah akibat masuknya air eksternal yang dapat melarutkan materi-materi terlarut, termasuk materi-materi organik hasil dekomposisi secara biologi. Lindi dari sebuah landfill (TPA) mengandung zat organik dan anorganik dalam konsentrasi yang tinggi. Dengan adanya gaya gravitasi maka lindi yang terbentuk akan bergerak ke dasar landfill (TPA) akan masuk ke dalam tanah dengan membawa bahan cemaran baik material tersuspensi maupun material terlarut yang dapat mencemari air tanah. Salah satu proses pengolahan lindi adalah dengan menggunakan reagen Fenton dan adsorpsi yang termasuk dalam teknologi Advanced Oxidation Processes (AOPs). AOPs didasarkan pada pembentukan spesies yang sangat reaktif seperti radikal hidroksil (OH•) yang efektif untuk menurunkan COD, BOD dan TSS. Penelitian ini bertujuan untuk mengolah lindi menggunakan reagen Fenton dan adsorpsi serta mempelajari rasio molar Reagen Fenton dan waktu pengadukan terhadap penurunan COD, BOD dan TSS. Pada penelitian ini lindi diolah selama 30-120 menit. Kondisi optimum dicapai pada rasio molar 1:200, waktu pengadukan 120 menit, dan adsorpsi menggunakan karbon aktif selama 120 menit dimana penurunan COD, BOD dan TSS maksimum yang dicapai berturut-turut 95%, 95% dan 92% dengan nilai konsentrasi akhir 96 mg/L, 25,5 mg/L% dan 90 mg/L.Kata Kunci: Lindi, Reagen Fenton, AOPs, COD, BOD, TSS ABSTRACTLeachate is a liquid generated by waste due to the entry of external water that can dissolve dissolved materials, including decomposition of organic matter biologically. Leachate from a landfill (TPA) contains organic and inorganic substances in high concentrations. by gravitational force, the leachate formed will move to the bottom of the landfill (TPA) and will enter the soil by carrying contaminated material, both suspended material and dissolved material that can pollute ground water. One of the leachate treatment processes is using Fenton reagent and adsorption. Fenton method included in Advanced Oxidation Processes (AOPs) technology. AOPs are based on the formation of highly reactive species such as hydroxyl radicals (OH•) which are effective for reducing COD and BOD. This study aims to treat leachate by using Fenton reagent and adsorption. The effect of reagent Fenton molar ratio and stirring time on degradation of COD, BOD and TSS were also investigated. In this study leachate was processed for 30-120 minutes. the optimum conditions were achieved at a molar ratio of 1: 200, stirring time of 120 minutes, and adsorption using 120 minutes of activated carbon where the maximum decrease in COD, BOD and TSS achieved was 95%, 95% and 92% with a final concentration of 96 mg/L, 25.5 mg/ L and 90 mg/ L.Keywords : Leachate, Fenton Reagent, AOPs, COD, BOD, TSS
oai:ijfac.unsri.ac.id:article/158
2020-12-02T06:47:57Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/158
2020-12-02T06:47:57Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 5, No 1 (2020): February 2020; 13-17
Biodiesel Production from Waste Cooking Oil using Induction Heating Technology
Moulita, RA Nurul; Politeknik Negeri Sriwijaya
Rusdianasari, Rusdianasari; Politeknik Negeri Sriwijaya
Kalsum, Leila; Politeknik Negeri Sriwijaya
2020-02-17 13:43:09
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/158
Rusdianasari, Politeknik Negeri Sriwijaya, Applied Master of Renewable Energy Engineering; Leila Kalsum, Politeknik Negeri Sriwijaya, Applied Master of Renewable Energy Engineering
en
Kerupuk and kemplang industries produce at least 65 liters of waste cooking oil per production. One form of the application of science and technology in the field of new and renewable energy can be done in processing the waste oil from industrial production through the conversion process into one of the environmental friendly alternative fuels, biodiesel. Biodiesel production process can be carried out by various methods, such as utilizing induction heating technology. This technology has non-contact properties that do not interfere with the reactions that occur because of its application, which produces heat from the workpiece. This study uses waste cooking oil as raw material with variations in the molar ratios 1:3, 1:4, 1:5, 1:6, and 1:7. The analysis showed that the maximum biodiesel production was used of 1: 7 molar ratio with 86.95% yield, 0.86 gr/cm3 of density, 5.73 cSt of viscosity, 190oC of flash point, and 0.44 mg-KOH/gr of acid number. The using this ratio produces maximum yield and following SNI.
oai:ijfac.unsri.ac.id:article/240
2022-02-03T08:35:07Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/240
2022-02-03T08:35:07Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 6, No 3 (2021): October 2021; 122-129
Optimization of Bio-Oil Pyrolysis Product from Palm Empty Fruit Bunches over H-Zeolite Catalyst using Response Surface Methodology (RSM)
Fanani, Zainal; Sriwijaya University
Rachmat, Addy; Sriwijaya University
hasanudin, Hasanudin; sriwijaya university
Said, Muhammad; sriwijaya university
2021-10-20 21:56:32
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/240
en
Bio-oil pyrolysis product considered as a promising resource of hydrocarbon compound that can be used as alternative fuel or other application. Palm empty fruit bunch (PEFB) based bio-oil converted into hydrocarbon trough pyrolysis over sulfate activation natural zeolite. Here, we reported an optimization process of bio-oil pyrolysis specifically on temperature and catalyst dose variables by using response surface methodology (RSM). Prior conversion process, PEFB was analyzed to determine cellulose, hemicellulose and lignin content. Sulfate activation natural zeolite confirmed its acidity by ammonia and pyridine adsorption calculated by gravimetric method. Two independent variables namely temperature and catalyst weight used in optimization process by RSM whereas response variable is conversion percentage. Analysis result on cellulose, hemicellulose and lignin content are 45.39%, 30.36% and 20.5% respectively. Catalyst acidity determination based on ammonia and pyridine adsorption gave 1.002 mmol/g and 0.1994 mmol/g. Optimum condition of hydrocracking achieved at 568 °C and 2.1088 g catalyst weight with the product obtained at 62.21% conversion. The best product density is 1.086 g/mL obtained at hydrocracking temperature 554 °C and 2.0362 g catalyst. Based on GC-MS analysis, it was confirmed that the product comprises more straight-chain hydrocarbon than cyclic one. RSM calculation able to formulate the feasible model equation to predict the conversion percentage. The equation is; percent conversion = 60.059 + 14.268T + 9.783W – 25.649T2 – 18.809W2 + 3.114TW, whereas model equation for response variable on product density; ρ= 1.09103 – 0.12356T – 0.09744W + 0.11489T2 + 0.28888W2 – 0.00740TW
oai:ijfac.unsri.ac.id:article/13
2018-02-20T04:26:06Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/13
2018-02-20T04:26:06Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 1, No 2 (2016): June 2016; 42-46
Production of Biodiesel from Esterification of Oil Recovered from Palm Oil Mill Effluent (POME) Sludge using Tungstated-Zirconia Composite Catalyst
Hasanudin, Hasanudin; Department of Chemistry Sriwijaya University
Rachmat, Addy
2016-10-04 15:03:36
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/13
en
Solid acid catalyst prepared from tungsten and zirconium oxide composite had been characterized and evaluated on biodiesel production by esterification of low quality oils taken from POME sludge. Catalyst characterization was conducted using Scanning Electron Microscopy (SEM) and acidity test. Acidity test of catalyst resulted using Gravimetry method is 5.4 mole/g. Esterification to produce biodiesel using tungsten and zirconium oxide composite show increasing amount of catalyst used will also increased conversion percentage of biodiesel produced and reach optimum value at 10%. Catalyst:oil ratio used to produce optimum conversion is 8:1 which converted 74.88% oil to biodiesel.Keywords: Tungsten-Zirconia composite, POME Sludge, EsterificationAbstrak (Indonesian). Penelitian tentang preparasi dan karakterisasi katalis komposit tungsten dan zirkonium oksida serta aplikasinya untuk esterifikasi minyak hasil recovery limbah sludge industri kelapa sawit telah dilakukan. Karakterisasi katalis dilakukan dengan menggunakan SEM dan uji sifat keasaman. Sifat keasaman katalis didapat sebesar 5,4 mol/g dengan metode gravimetri. Hasil pembuatan biodiesel dengan menggunakan katalis komposit tungsten dan zirkonium oksida didapatkan bahwa semakin besar jumlah katalis yang digunakan semakin besar pula % konversi biodiesel yang dihasilkan dan optimum pada 10%. Sementara perbandingan jumlah metanol:minyak didapatkan nilai optimum pada perbandingan 8:1 dengan % konversi biodiesel sebesar 74,88%.Kata Kunci: Tungsten-Zirconia composite, POME Sludge, Esterifikasi
oai:ijfac.unsri.ac.id:article/313
2023-06-27T14:21:49Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/313
2023-06-27T14:21:49Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 8, No 2 (2023): June 2023; 70-75
Coumarin Derivative from the Unripe Fruit of Mengkudu (Morinda citrifolia Linn) and Cytotoxic Activity
Ferlinahayati, Ferlinahayati; Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya University
Nisa, Sarifatun; Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya University
Hermansyah, Hermansyah; Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya University
Basir, Dasril; Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Sriwijaya
2023-06-27 21:18:58
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/313
en
A coumarin derivative namely scopoletin (7-hydroxy-6-methoxychromen-2-one) had been isolated from the methanol extract of unripe noni fruits (Morinda citrifolia Linn.). The extraction was conducted by maceration, continuing with separation and purification using several techniques of chromatography. The yellowish isolated compound showed a melting point at 200 – 202 °C. The compound structure was analyzed based on spectral data 1H-NMR, 13C-NMR, and NOE 1D. The inhibition of methanol extract of noni fruits and scopoletin against murine leukemia P388 cells using MTT assay showed IC50 were > 100 μg/mL and 65.69 μg/mL respectively. These showed that scopoletin was more cytotoxic than methanol extract but weaker than artonin E as a positive control IC50 0.48 μg/mL)
oai:ijfac.unsri.ac.id:article/101
2018-11-28T02:27:54Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/101
2018-11-28T02:27:54Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 3, No 3 (2018): October 2018; 59-65
Bioremediation of Spent Bleaching Earth (SBE) Waste Using Lipolytic Fungi
Menangcaye, Riezkatama; Environmental Management Program, Graduate Program, Sriwijaya University
Napoleon, Adipati; Environmental Management Program, Graduate Program, Sriwijaya University
Yudono, Bambang; Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya University
2018-10-11 12:39:17
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/101
en
The purpose of this research was to obtain the effectiveness level of bioremediation process of oil residue on SBE waste by using the isolates of lipolytic fungus Aspergilus fumigatus, Cylindrocladium sp and Fumago sp. This research was conducted by using completely randomized factorial design with 3 factors of treatment which consist of nutrient ratio (N:P:K) that were divided into three levels, namely n1=A(7:1.5:0.5), n2=B(14:3:1), n3=C(21:6:1.5). The humidity were divided into 3 levels treatment i.e. k1 (90%), k2 (80%), k3 (70%) and time that were divided into four levels, namely w1 (week 1), w2 (week 2), w3 (week 3), and w4 (week 4) with fixed pH i.e. pH 6, so that were obtained 36 combination of treatment and for each treatment combination repeated 3 times. Sampling of SBE waste was conducted in one cooking oil factory in South Sumatera using randomized sampling method as much as 24.000 g. The results showed that 80% humidity and nutrient A as the best treatment for lipolytic fungus consortium performance to degrade the SBE waste with the average percentage of oil degradation as much as 74.83%. 80% humidity and nutrient A was an effective interaction in affecting the percentage of oil degradation.
oai:ijfac.unsri.ac.id:article/151
2019-10-22T08:10:26Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/151
2019-10-22T08:10:26Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 4, No 3 (2019): October 2019; 132-138
Effect of Addition of Urea and Zeolite on Rice Plants (Oryza sativa L.) to Nitroxy Emissions on Peatlands
Afriyani, Asia Asia; Universitas Sriwijaya
Prayitno, Muhammad Bambang; Soil Science Department, Faculty of Agriculture, Sriwijaya University
Hariani, Poedji Loekitowati; Department of Chemistry, Universitas Sriwijaya
2019-10-10 20:20:48
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/151
en
The purpose of this study is to analyze nitro oxide emissions as a result of adding urea and zeolite to rice plants (Oryza sativa L.) on peatlands. The treatments used were 2 factors, namely factor 1 using a dose of urea fertilizer from three levels of treatment N1 : 125 kg/ha; N2 : 250 kg/ha; N3 : 375 kg/ha and factor 2, the dose of zeolite consists of three levels of treatment Z1 : 125 kg/ha; Z2 : 250 kg/ha; Z3 : 375 kg/ha. Each combination was repeated as many as 5 phases (phase 1 = 15 DDP, phase 2 = 35 DDP, phase 3 = 55 DDP, phase 4 = 65 DDP and phase = 90 DDP) so the number of units treatment 3 x 3 x 5 = 45 pots. Data analysis used linear regression test. The results showed the administration of a combination of urea doses and zeolite in rice plantations had not significant effect on nitrous oxide emissions produced at each observation. In this study, the highest nitrous oxide emissions were obtained in phases 1 and 2. From the results of the F test is Ho rejected. With this it is proven that the urea dose partially has not significant effect on nitro oxide emissions. The dose of zeolite (X2) is H0 is rejected, thus showing that zeolite has not significant effect on the availability of nitrous oxide emissions.Keywords: Urea, Zeolite, Nitro oxide emissions peatlands
oai:ijfac.unsri.ac.id:article/207
2022-02-03T07:43:56Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/207
2022-02-03T07:43:56Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 6, No 2 (2021): June 2021; 33-39
Characterization and Investigation on Photocatalytic Activities of TiO2/Coconut Shell-Based Activated Carbon
Sheilatina, Sheilatina; Department of Chemistry, Universitas Syiah Kuala, Kopelma Darussalam, Banda Aceh – Indonesia
Lubis, Surya; Department of Chemistry, Universitas Syiah Kuala, Kopelma Darussalam, Banda Aceh – Indonesia
Fathurrahmi, Fathurrahmi; Department of Chemistry, Universitas Syiah Kuala, Kopelma Darussalam, Banda Aceh – Indonesia
Oktari, Amalia; Department of Chemistry, Universitas Syiah Kuala, Kopelma Darussalam, Banda Aceh – Indonesia
2021-06-18 21:01:16
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/207
Universitas Syiah Kuala
en
Coconut shell-based activated carbon-supported TiO2 catalyst had been prepared with a sol-gel method using titanium tetraisopropoxide acting as TiO2 precursor. TiO2/activated carbon photocatalyst was characterized with X-Ray Diffraction (XRD), Fourier Transform-Infrared (FT-IR), Scanning Electron Microscopy-Energy Dispersive X-Ray (SEM-EDX), and surface area analysis using Brunauer–Emmett–Teller (BET) adsorption-desorption isotherm. Photocatalytic activities of TiO2/activated carbon were investigated through the degradation of indigo carmine using UV light. The highest degradation percentage (%D) obtained for the indigo carmine was 91.79% at pH 3 and an initial concentration of 5 mg L-1 after 25 min radiation. TiO2/activated carbon showed higher photocatalytic activities when sunlight was used, in comparison to that of UV light.
oai:ijfac.unsri.ac.id:article/11
2017-09-23T10:31:27Z
ijfac:ART
oai:ijfac.unsri.ac.id:article/259
2023-05-03T02:27:54Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/259
2023-05-03T02:27:54Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 8, No 1 (2023): February 2023; 1-7
Delignification and Adsorption Research of Bioethanol Process using Pseudostem of Musa Balbisiana (Pisang Klutuk) as the Blending Raw Material to Gasohol
Arjeni, Rafit; Politeknik Negeri Sriwijaya
Hasan, Abu; Politeknik Negeri Sriwijaya
Syarif, Aida; Politeknik Negeri Sriwijaya
2023-02-25 22:22:05
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/259
en
Indonesia is a country that has the most energy sources in the Southeast of Asia and the fifth in Asia-Pacific subsequent to China, India, Japan and South Korea. Energy usage in Indonesia in 2016 was still dominated by 47% fuel oil. If the energy usage increases continuously, energy sustenance and resilience in Indonesia will be plagued. Therefore, there is a necessary to utilize the alternative energy sources that would be earth-friendly as well New and Renewable Energy (EBT) like bioethanol. Bioethanol can be produced by organic wastes, pseudostem of Musa Balbisiana (Pisang Klutuk) as the example. This research is focused on the study of delignification and adsorption of the process of bioethanol using pseudostem of Musa Balbisiana as the blending raw material to gasohol. The process started with the pre-treatment and delignification of the pseudostem of Musa Balbisiana with the sorts of NaOH concentration including the following of 10%, 20%, 30% and 100oC, 125oC, 150oC, 175oC, dan 200oC for the heating temperatures. In delignification, it can be stated that the concentration of 10% NaOH on 150oC temperature produced the finest cellulose and lignin content with the amount of 81,3% cellulose and 10,1% lignin. The pseudostem fibers that have passed the process of delignification, was done to the process of hydrolysis and fermentation for producing bioethanol. The result of Bioethanol was carried out to the process of distillation for separating bioethanol and water. Continuing the process, bioethanol was purified in adsorption and distillation process. In adsorption, the 5gr, 10gr, 15gr, 20gr, and 25gr adsorbent alloyed to the purified bioethanol, and it can be claimed that the highest rate of purified bioethanol is 20gr with the 99,11% bioethanol content. The 99,11% bioethanol content was blending with Pertalite with the ratios of 5:95, 10:90, 15:85, 20:80, and 25:75, thereafter it was analyzed the RON content which obtained the highest point that is 97,48 on 25:75 ratio.
oai:ijfac.unsri.ac.id:article/83
2018-02-18T14:04:42Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/83
2018-02-18T14:04:42Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 3, No 1 (2018): February 2018; 7-11
Separation of Glycerol from Biodiesel Oil Products Using High Voltage Electrolysis Method
Trisnaliani, Lety; Chemical Engineering Department
D-IV Energy Engineering
State Polytechnic of Sriwijaya
Zaki, Ahmad; Polytechnic of Sriwijaya
2018-02-11 12:40:36
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/83
en
This study aims to separate glycerol from used cooking oil biodiesel products. This research is done by main process by analyzing free fatty acid level (FFA) to know the fat content of the oil in order to know the next process. This research is done by electrolysis process using high voltage. We done transesterification process by using methanol and NaOH as catalyst before performing the process of electrolysis with high voltage. Biodiesel is manufactured using a mini-scale stirred tank reactor (RATB) laboratory. This process is heated at temperature (35-60) oC, the ratio of used cooking oil and methanol (5:1, 6:1, 7:1, 8:1, 9:1) using a 0.1 N NaOH catalyst. The research obtained optimum reaction temperature yield highest percentage of rendement at temperature 60oC and ratio of used cooking oil and methanol 5:1 with percentage of rendement equal to 88,88, cetane number 48,4, kinematic viscosity 2,560, pour point 37,4 oF, flash point 131 oF, Conradson Carbon Residue (CCR) 0.09, and ASTM Colour 1.5. This shows that the manufacture of biodiesel with high microwave and high voltage utilization yields a high percentage of 88.88 and the product is biosolar-48.
oai:ijfac.unsri.ac.id:article/177
2021-11-03T06:57:50Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/177
2021-11-03T06:57:50Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 6, No 1 (2021): February 2021; 1-7
Utilization of Bottom Ash Coal and Agarwood in Waste Water Treatment in Palembang Jumputan Fabric
Hartati, Eis Sri; Sriwijaya University
Dahlan, Muhammad Hatta; Sriwijaya University
Sari, Tuti Indah; Sriwijaya University
2021-02-20 20:39:11
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/177
en
Liquid waste is easily recognized because of the presence of dyes. Waste containing dyes can cause visual pollution and increase the risk of environmental and health damage. The aim of this study was to determine the operating conditions of the best jumputan liquid waste treatment using bottom ash batubara and agarwood with variations in feed flow rate (1, 2, and 3 l/minutes), filtration time (30, 60, 90, and 120 minutes), and treatment. The results of jumputan liquid waste treatment are compared with the parameters of Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Suspended Solids (TSS), and pH of clean water quality standards for jumputan industry businesses and/or activities regulated in the Governor’s of Sumatera Selatan Regulation Number 16 of 2005 concerning Wastewater Quality Standards. The initials analysis of jumputan liquid waste before processing showed that jumputan liquid waste did not meet these quality standards, except pH and turbidity levels. In this study, jumputan liquid waste was pre-treated using coal bottom ash and activated carbon, then filtered. Biodegradation of jumputan liquid waste by konvensional method. The best of BOD, COD, TSS, pH, and the percentage of color rejection in the study were obtained in the treatment of jumputan liquid waste using bottom ash batubara and activated carbon at a 120 minutes filtration time and a 1 l/minutes feed flow rate namely BOD 5.98 mg/l, COD 15 mg/l, TSS 22.3 mg/l, pH 7.32, color 5 Pt-Co, and 0 NTU turbidity. The filtration with bottom ash coal and agarwood can removed the coloring from dyes.
oai:ijfac.unsri.ac.id:article/247
2023-05-02T04:02:38Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/247
2023-05-02T04:02:38Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 7, No 3 (2022): October 2022; 143-147
Utilization of Polypropylene (PP) Plastic Waste with Waste Oil Palm Empty Brunch for an Alternative Fuels
Harahap, Putri Sakinah; Universitas Jambi
Syarifuddin, Hutwan; Universitas Jambi
Ulyarti, Ulyarti; Department of Agriculture Product Technology, Faculty of Agriculture, University of Jambi
Nazarudin, Nazarudin; 1) Master of Enviromental Study Program, University of Jambi, Jambi, Indonesia
2) Chemical Engineering, FST, University of Jambi, Jambi, Indonesia
3) Energy and Nano Material Centre, LPPM, Universitas Jambi, Jambi, Indonesia
2022-10-28 19:45:21
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/247
Center of Excellent on Bio-Geo Material and Energy, Universitas Jambi, Jambi , Indonesia
en
The need for plastic corresponds with the annual rise in population. Meanwhile, plastic waste that is improperly managed can negatively influence the environment. Therefore, a more promising alternative recycling process is needed to convert this waste into oil by cracking, and the process is possibly assisted by adding empty palm oil bunches. This study examines how modifications in the ratio of oil palm empty bunches to Polypropylene (PP) plastic waste influence the percent liquid produced by cracking and the heating value during the process. It is a completely randomized design (CRD) with variations in the ratio of plastic raw materials: oil palm empty fruit bunches 1:0, 1:1, 1:2, and 1:3 at a temperature of 450°C and 40 minutes duration. This resulted in liquid conversion from cracking of 80% at 1:1 of PP: TTKS 1:1. However, the addition of oil palm empty fruit bunches to polypropylene polymers does not affect the increase in the percent conversion outcomes. The results of the heat test analysis show the value of 6.681 MJ/kg and 1.512 MJ/kg. Keywords: Cracking, catalytic cracking, polypropylene plastic, biomass, alternative energy
oai:ijfac.unsri.ac.id:article/50
2018-02-20T03:35:32Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/50
2018-02-20T03:35:32Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 2, No 2 (2017): June 2017; 34-38
Characterization of Activated Carbon from Coal and Its Application as Adsorbent on Mine Acid Water Treatment
Hardianti, Siti; Department of Chemistry Sriwijaya University
Rachman, Susila Arita
E.H., Harminuke
2017-10-05 10:25:54
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/50
en
Anthracite and Sub-bituminous as activated carbon raw material had been utilized especially in mining field as adsorbent of dangerous heavy metal compound resulted in mining activity. Carbon from coal was activated physically and chemically in various temperature and particle sizes. Characterization was carried out in order to determine the adsorbent specification produced hence can be used and applied accordingly. Proximate and ultimate analysis concluded anthracite has fixed carbon 88.91% while sub-bituminous 49.05%. NaOH was used in chemical activation while heated at 400-500°C whereas physical activation was conducted at 800-1000°C. Activated carbon has high activity in adsorbing indicated by high iodine number resulted from analysis. SEM-EDS result confirmed that activated carbon made from coal has the quality in accordance to SNI and can be used as adsorbent in acid water treatment.
oai:ijfac.unsri.ac.id:article/356
2024-03-13T01:36:20Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/356
2024-03-13T01:36:20Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 9, No 1 (2024): February 2024; 26-34
Simulation Study of Propylene Glycol Formation from Propylene Oxide and Water: Effect of Reactor Type, Reactant Ratio, Temperature, and Reactor Configuration
Ariyanto, Eko; University of Muhammadiyah Palembang,
Yusmartini, Eka Sri; Universitas Muhammadiyah Palembang
Robiah, Robiah; Universitas Muhammadiyah Palembang
Ardianto, Feby; Universitas Muhammadiyah Palembang
2024-02-25 22:54:48
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/356
en
This study investigates the influence of reactor type, reactor configuration, reactor temperature, and reactant ratio on the formation of propylene glycol from propylene oxide and water using HYSYS simulation software. The examined reactor types include Continuous Stirred Tank Reactors (CSTR) and Plug Flow Reactors (PFR). The impact of reactant ratio is explored by varying the mole ratio of propylene oxide to water. The effect of temperature is studied by altering the reaction temperature from 24 to 40 °C. HYSYS simulation results reveal that PFR yields the highest conversion compared to CSTR. Furthermore, consecutive CSTR configuration produces higher conversion than parallel CSTR configuration. Additionally, an increase in reaction temperature from 24 to 40 °C enhances the conversion of propylene oxide to propylene glycol. The reactant ratio 1:1 (propylene oxide to water) yields the highest conversion compared to other reactant ratios. The implications of these findings are to provide insights into more efficient and economical propylene glycol processes. The study suggests that PFR configuration, consecutive CSTR configuration, elevated reactor temperatures, and optimal reactant ratios can significantly improve the efficiency of propylene glycol formation.Keywords: Propylene Glycol, CSTR, PFR, Conversion, HYSYS Simulation
oai:ijfac.unsri.ac.id:article/137
2019-06-10T04:23:26Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/137
2019-06-10T04:23:26Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 4, No 2 (2019): June 2019; 59-66
The Characteristic of Coal Oil From Catalytic Coal Gasification
Damayanti, Rika; Universitas Sriwijaya
Arita, Susila; Universitas Sriwijaya
Hadiah, Fitri; Universitas Sriwijaya
2019-06-10 11:23:02
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/137
en
In this work, the catalytic gasification process of coal was studied at different operating temperatures and catalyst weights. The purpose of this study was to study the characteristics of coal oil produced through the gasification process using Nickel Molybdenum (NiMo) catalyst. The effect of adding NiMo catalyst with variations in weight of 0%, 5%, 10% and 15% for different gasification temperatures (375 – 385 °C, 430 – 440 °C, and 475 – 485 °C) were studied on coal with a calorific value of 6,400 kcal/kg. The process was done in fluidized bed reactor under atmospheric pressure and an air flow rate of 2 liters/minute was flow for 60 minutes. The results showed that NiMo is effective as a catalyst in the gasification of coal at 430 – 440 °C, the addition of 15% weight of catalysts produced coal oil with a yield of 9.35% and the composition of hydrocarbon consists of 59.75% of aromatics, 26.42% of aliphatics, and 7.34% of phenolics. Compared to coal oil without catalyst give a yield of 6.56% with 57.33% of aromatics, 17.44% of aliphatics, and 16.03% of phenolics. This showing that NiMo catalysts have a high selectivity to increase aromatic and aliphatic hydrocarbons in coal oil.
oai:ijfac.unsri.ac.id:article/185
2021-05-24T03:24:49Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/185
2021-05-24T03:24:49Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 5, No 2 (2020): June 2020; 42-48
The Effect of Calcium Oxide and Aluminum Sulfate on Iron, Manganese and Color Removal at Peat Water Treatment
Mulyadi, Dedy; Sriwijaya University
Haryati, Sri; Sriwijaya University
Said, Muhammad; Sriwijaya University
2020-06-20 17:32:53
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/185
en
The availability of clean water is a basic need for human life. Peat water is well-known as acidic water (low pH), high content of Fe2+ and Mn2+ and colored that make it hard to remove by conventional filtration method. Treatment in batch and continuous methods by using Calcium Oxide (CaO) and aluminum sulfate Al2 (SO4)3×18H2O result in significance reduce of iron and manganese. The batch method in particular, able to reduce iron from 3.5 ppm to 0.1 ppm (97%), manganese from 0.59 ppm to null (100%) and color from 130 TCU to 1.7 TCU. Turbidity also reduced from 33.8 NTU to 1.9 NTU whereas pH increase from 3.19 to 6.8. The continuous method in different circumstances shows iron removal from 3.35 ppm to 0.05 ppm (98.6%), manganese from 0.5 ppm to null (100%) whilst pH raised from 3.19 to 7.16 and turbidity decrease from 31.8 NTU to 1.14 NTU. Both results fulfill the water quality standard required by Permenkes No. 416/Menkes/1990
oai:ijfac.unsri.ac.id:article/243
2022-11-07T08:04:55Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/243
2022-11-07T08:04:55Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 7, No 1 (2022): February 2022; 21-25
Preconcentration of Cadmium assisted with sonication using Dowex 50WX2-200 Resin
Nuraini, Siti; Integrated Laboratory of Analysis, Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Sriwijaya
Yuniar, Yuniar; University of Sriwijaya
2022-02-20 22:09:27
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/243
en
Preconcentration of Cd in water has been carried out using Dowex 50WX2-200 resin as a solid phase extractor. The extraction process was carried out with a sonicator. Elution of Cd which was adsorbed by the resin was released again using 1M HNO3, then Cd was measured using Flame-Atomic Absorption Spectrophotometer. In this study, the effects of pH, sample solutian sonication time, elution time of Cd adsorbed and eluent volume were studied. The results of the optimization of preconcentration conditions were obtained at pH 3, the duration of the sonication process for Cd adsorption was 15 minutes and the elution time was 7.5 minutes and the eluent volume of 1M HNO3 was 10 ml. Method validation was carried out using a Certificate Reference Material, CRM for clean water at optimum conditions. The Accuracy and precision measurement results were obtained 96% recovery and 11% RSD (n=3) which showed the accuracy still in the ranges of acceptance criteria according to the AOAC, between 70% -125 and precision with % RSD < CV Horwitz 14%. Finally, preconcentration of Cd metal in water was successfully with sonicator assistedKeywords: Cd, Dowex 50WX2-200, Flame-SSA.
oai:ijfac.unsri.ac.id:article/28
2018-02-20T04:34:06Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/28
2018-02-20T04:34:06Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 1, No 3 (2016): October 2016; 72-77
Analyses of Non-bonding Length, Partial Atomics Charge and Electrostatic Energy from Molecular Dynamics Simulation of Phospholipase A2 – Substrate
Syarif, Nirwan; Department of Chemistry Sriwijaya University
Rohendi, Dedi
2016-11-17 17:17:21
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/28
en
Abstract: This paper reports molecular dynamics simulation of phospholipase A2 (PLA2)– substrate that has been done. Non-bonding length, partial atomic charge and electrostatic energy were used to evaluation the interaction between PLA2 and substrate. The research was subjected for three types of PLA2 of different sources, i.e, homo sapien, bovinus and porcinus, by using computer files of their molecular structures. The files with code 3elo, 1bp2, dan 1y6o were downloaded from protein data bank. Substrate structure can be found in 1y60 and was separated from its enzyme structure and docked into two other PLA2 structures for simulation purpose. Molecular dynamics simulations were done for 30000 steps with constant in number of molecules, volume and temperature (NVT). The results showed the existing of flip-flop mechanism as basic feature of PLA2 – substrate reactions. Interaction length analysis results indicated the presence of water molecules on the structures of 1bp2 and 3elo at the time of the simulation was completed. The existence of aspagine at the reaction site confirmed the theory that this amino acid is responsible for the survival of the reaction. the electrostatic energy increased substantially in the interaction after homo sapien PLA2 (3elo) and Bovinus (1bp2) with the substrate. Inverse effect took place in the PLA porcinus (1y6o).Keywords: flip flop, inflammation, in-silico, simulation Abstrak (Indonesian): Telah dilakukan penelitian tentang simulasi dinamika molekuler pada Situs Reaksi Phospholipase A2 (PLA2) dengan substratnya. Analisis panjang non-ikatan, muatan atom parsial dan energi elektrostatis digunakan untuk menilai interaksi antara PLA2 dan substratnya. Penelitian dilakukan pada tiga jenis sumber PLA2, yaitu homo sapien, bovinus dan porcinus dengan menggunakan file komputer untuk struktur molekul dengan kode 3elo, 1bp2, dan 1y6o. Pada file 1y60 terdapat struktur substrat yang dapat ditemukan secara alamiah. Kedua file lainnya tidak mengandung struktur molekul substrat. Simulasi dinamika molekul dilakukan untuk 30.000 langkah dengan konstan dalam jumlah molekul, volume dan suhu (NVT). Hasil penelitian menunjukkan keberadaan mekanisme flip-flop sebagai fitur dasar reaksi PLA2 - substrat. Hasil analisis panjang interaksi menunjukkan bahwa kehadiran molekul air pada struktur 1bp2 dan 3elo pada saat simulasi dilakukan. Keberadaan aspagine di lokasi reaksi menegaskan teori bahwa asam amino ini bertanggung jawab untuk kelangsungan hidup reaksi. energi elektrostatik meningkat secara substansial dalam interaksi setelah homo sapien PLA2 (3elo) dan Bovinus (1bp2) dengan substrat. efek terbalik terjadi di porcinus PLA (1y6o).Kata kunci: flip flop, inflamasi, peradangan, in-silico, simulasi
oai:ijfac.unsri.ac.id:article/324
2023-06-27T14:21:49Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/324
2023-06-27T14:21:49Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 8, No 2 (2023): June 2023; 105-109
Preconcentration of Cr(III) Using Dowex 50WX2-200 Resin and Its Application to River Water
Nuraini, Siti; Magister Program of Chemistry Faculty of Mathematics and Natural Sciences, Universitas Sriwijaya
Suheryanto, Suheryanto; Sriwijaya University
Hariani, Poedji Loekitowati; Sriwijaya University
2023-06-27 21:19:20
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/324
en
Cr(III) is one of the most stable chromium species in nature, Cr(III) species are not carcinogenic to humans, but if the levels in the body exceed 0.2 mg / day it is very dangerous for the body especially in the respiratory tract. The presence of chromium in the aquatic environment is so low that it is very difficult to detect it using instruments with various limitations to detect it, therefore preconcentration techniques are carried out to overcome the issue. In this study the water sample was adjusted pH using HNO3 0.1 M or NaOH 0.1 M, after which it was passed in the dowex column 50WX2-200. Furthermore, an elution process was carried out using the 1 M HNO3 eluent, the eluat was measured for absorbance with flame AAS. The results of Cr(III) preconcentration optimization are: resin weight 0.5 g, HNO3 eluent concentration 1 M, solution pH 3 and sample volume 50 – 100 mL. The Cr(III) preconcentration technique using Dowex 50WX2-200 resin has been applied to river water samples with a detectable concentration of 0.0075 mg/L.
oai:ijfac.unsri.ac.id:article/114
2018-11-28T05:08:57Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/114
2018-11-28T05:08:57Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 3, No 3 (2018): October 2018; 89-93
Effect of DC Voltage on Prototype of Biodiesel Electrostatic Separator with Glycerin from Waste Cooking Oil
Putra, Jaya Utama; Politeknik Negeri Sriwijaya
Kalsum, Leila; Politeknik Negeri Sriwijaya
Bow, Yohandri; Politeknik Negeri Sriwijaya
2018-10-11 12:39:35
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/114
en
The limitations of fossil fuel support on fulfillment of energy need in a sustainable and environment friendly fashion has drove society to efforts of finding and developing fresh and renewably resources. Biodiesel is one the renewable energy resource and shows environment friendly property, consist of alkyl of fatty acids monoester originated from vegetable oil or animal fat.One of important steps in biodiesel production is separation of glycerin from product. Electrostatic method has been proved in accelerating saturation of glycerin. However, several aspects still need a careful assessment to acquire biodiesel production process with standard quality assigned. In this work, we designed an electrostatic separator of biodiesel from glycerin using waste cooking oil feed. The prototype was tested in several different voltages 12 Vdc, 20 Vdc, 30 Vdc and 33.5 Vdc. The result shows the highest voltage obtained is 33.5 Vdc, separation time 2 minutes 10 seconds having viscosity, water content and density i.e. 7.2139 cSt, 0.0321% and 0.85 g/mL respectively whereas flash point increase to 1917 C. The data confirmed that the product fulfills required standard value fordensity, water content and flash point.
oai:ijfac.unsri.ac.id:article/155
2019-10-22T08:10:26Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/155
2019-10-22T08:10:26Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 4, No 3 (2019): October 2019; 104-110
Synthesis of Superabsorbent Polymer based Glucomanan-Polyacrylate by Gamma Irradiation
https://ijfac.unsri.ac.id/index.php/ijfac/article/download/155/682
Mulijani, Sri; Department of Chemistry
Bogor Agriculture University
Bogor
Sugiarti, Sri; Department of Chemistry, Bogor Agriculture University, Bogor
Erizal, Erizal; Pusat Aplikasi Isotop dan Radiasi, National Nuclear Energy Agency of Indonesia, Jl Pasar Jumat Lebakbulus Tangerang
Fajriani, Qory Hajrul; Department of Chemistry, Bogor Agriculture University, Bogor
2019-10-10 20:20:27
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/155
en
Materials with potential of fast absorption of water or liquid have emerged as very interesting objects for researches. Superabsorbent polymer is a cross linked polymer which has ability to absorb water hundreds to thousands of times the dry weight because it has hydrophilic groups. Owing to this characteristic this polymer gets attention for many applications, one of these is diapers. Superabsorbent polymer was synthesized from the mixture of glucomannan-pottasium acrylic-acrylamide solution by irradiation crosslinking with doses irradiation 10 kGy. It was found that SAP showed super swelling properties in water (880 g/g) at short time (15 minutes) and in real urine has a good swelling 110 g/g. Acrylamide was able to increase the swelling ratio in real urine. Therefore, it can be candidate as thin diapers with high sorption. The result of FTIR spectra confirmed that the crosslinkingoccurs in the hydrogels and SEM images of hydrogels showed large numbers of pores from SEM examinationKeywords: Superabsorbent polymer; Acrylic acid; Acrylamide; Glucomannan; Irradiation
oai:ijfac.unsri.ac.id:article/226
2022-02-03T08:31:38Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/226
2022-02-03T08:31:38Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 6, No 3 (2021): October 2021; 90-95
Characterization of Fly Ash Catalyst Using XRD Method for Biofuel Production from Used Cooking Oil
Pranata, Dina Eka; Politeknik Negeri Sriwijaya
Syarif, Aida; Politeknik Negeri Sriwijaya
Yerizam, Muhammad; Politeknik Negeri Sriwijaya
2021-10-20 21:56:10
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/226
en
Fly ash catalyst that has been activated using NaoH 2M was analyzed using XRD at an angle of 2θ = 15 ° - 80 ° with a wavelength (λ) of X rays of 0.15406 nm. From the results of the analysis, the NaO26Si6Y9 compound is obtained with a hexagonal structure. Furthermore, the XRD analysis results obtained in the form of wavelength, intensity, 2θ and FWHM values will be substituted into the Debye Scherrer equation to calculate the size of the crystal structure of the Fly Ash catalyst. From this equation, a graph of the relationship between ln(b) dan ln(1/cos(q )) will be drawn so that the intercept value is - 4.0688 and the value of K = 0.9 and λ = 0.15406 nm. The value of K and λ can be calculated using the modified Debye Scherrer equation, so that the crystal size (D) is 8,10942 nm.
oai:ijfac.unsri.ac.id:article/8
2018-02-20T04:19:54Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/8
2018-02-20T04:19:54Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 1, No 1 (2016): February 2016; 19-23
Isolation of Triterpenoid from Katemas (Euphorbia geniculata Ortega) Stem Extracted using Methanol and Its Toxicity Test
Eliza, Eliza; Department of Chemistry Sriwijaya University
Fatsiami, Ricce
Yusuf, Setiawati
Ferlinahayati, Ferlinahayati
2016-09-14 14:00:22
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/8
en
Katemas (Euphorbia geniculata Ortega) known as (Mexican) Fireplants, Painted Euphorbia, Japanese poinsettia is a plant belong to Euphorbiaceae or spurge family. Traditionally, this plant is used as furgative and treat dysentry. The aims of the research were to evaluate the toxicity and to isolate one of the triterpenoid extracted using methanol from the stem of this plant. The toxicity was evaluated by mortality test against armyworm larvae (Spodoptera litura). This assay was obtained by Methanol extraction at various concentrations (0, 1, 2, 3, 4 and 5%). The isolation process was conducted by series of work steps such as extraction, fractionation and purification. Structure elucidation was determined by spectroscopy techniques. Toxicity assay exhibited highest mortality at 5 % concentration with LC50 3,92%. Spectroscopy data analysis was able to identified a type of pentacyclic triterpenoid compound namely lupeol acetate.Keyword: Euphorbia geniculata Ortega, toxicity, lupeol acetate
oai:ijfac.unsri.ac.id:article/302
2023-05-03T02:31:29Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/302
2023-05-03T02:31:29Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 8, No 1 (2023): February 2023; 40-47
Synthesis of Chitosan−Al2O3 Composite using the Sol-Gel Method and Its Application in Photodegradation of Methylene Blue
Desnelli, Desnelli; Department of Chemistry, Sriwijaya University
Padilah, Ipro Hati
Ulfa, Maria
Eliza, Eliza
Mara, Ady
Fatma, Fatma
2023-02-25 22:22:06
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/302
en
The research on synthesis of composites Kitosan-Al2O3 by the sol-gel method for photodegradation of methylene blue has been carried out. Chitosan-Al2O3 varied by mass ratios (1:1), (1:2) and (1:3). The product were characterized using XRD and UV-DRS. Chitosan-Al2O3 ratio (1:1) were characterized by SEM-EDS. The best material will be used to degrade the mehtylene blue by various condition, i.e., effect of pH, contact time and initial concentration of methylene blue. The Chitosan-Al2O3 (1:1) composite was chosen as a material for degrading methylene blue. The result of characterization using XRD showed crystal size the Chitosan- Al2O3 (1:1) composites result were 3,17 nm. UV-DRS characterization, The band gap energy is 1,35 eV. The morphological condition by SEM of Chitosan-Al2O3 ratio (1:1) showed a spherical shape with a small size, and a porous surface the constituent elements C (4.93%), O (33.31%), Na (13.92%), Al (45.59%) dan Zn (2.24%). The degradation process showed the effective condition were pH 10 and contact time of 200 minutes. The optimum concentration of methylene blue at 20 ppm with percent effectivity of concentration reduction methylene blue i.e. 79.35% and the result of TOC analysis i.e. 22,36%. The Chitosan-Al2O3 can be used to degraded the Methylene blue.
oai:ijfac.unsri.ac.id:article/87
2018-06-05T02:29:29Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/87
2018-06-05T02:29:29Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 3, No 2 (2018): June 2018; 35-39
The Effect of Chitosan Addition to the Digestibility of Dried Matter, Organic Matter and Crude Protein of Tegal’s Duck Rations
Sahara, Eli; Animal Husbandy Program, Faculty of Agriculture, Universitas Sriwijaya
Widjastuti, Tuti; Faculty of Animal Husbandry, Padjadjaran University
Balia, Rostita L; Faculty of Animal Husbandry, Padjadjaran University
Abun, Abun; Faculty of Animal Husbandry, Padjadjaran University
2018-06-04 21:33:45
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/87
en
The optimum performance of duck farm can be achieved by providing them with good quality rations. Rations with good digestibility will increase the productivity due to large amount intake of nutrients. Chitosan is type of animal fibre which assisted the growth of useful microbes in digestive system. Addition of chitosan in cattle rations will improve the ecologic of duck digestive system to be more conducive. The aimed of the research was to evaluate rations digestibility with the addition of chitosan. The research was used completely randomized design with 4 treatments and 5 repetitions. Each repetition consists of 2 ducks. The treatments are R0 stands for rations without chitosan and R1-R3 with addition of chitosan 0.5%, 2% and 2.5% respectively. Parameter measured were dried matter digestibility, organic matter and crude protein. Data processing was conducted by using SAS Windows 16. Result showed chitosan addition at 0.5% and 2.5% gave dried matter digestibility and crude protein does not higher than control (P>0.05) while chitosan addition at 2% gave result lower than control. Organic matter digestibility displays balanced in value.Keywords: Chitosan, Dried matter digestibility, organic matter, crude protein, rations.
oai:ijfac.unsri.ac.id:article/131
2019-06-10T04:23:26Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/131
2019-06-10T04:23:26Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 4, No 2 (2019): June 2019; 42-46
Isolation of Flavonoid Compound and Antioxidant Activity of Salix tetrasperma Roxb. Leaves
Januarti, Ria; Andalas University
Santoni, Adlis; Andalas University
Efdi, Mai; Andalas University
2019-06-10 11:22:50
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/131
en
Salix Tetrasperma Roxb. is a plant that found in Indonesia were used as traditional medicine such as diabetes and wound healing. In this study, a flavonoid compound of the ethyl acetate extract of Salix tetrasperma Roxb. leaves was isolated by chromatography technique and the antioxidant activity was determined by DPPH assay. The isolation led to obtain 5,7-dihydroxy-3'-methoxyflavone based on NMR spectra. The ethyl acetate extract exhibited the highest antioxidant activity with the IC50 is 65.89 µg/mL. This study shows that the Salix tetrasperma Roxb. has good potential as source of antioxidant agent.
oai:ijfac.unsri.ac.id:article/209
2022-02-03T07:53:45Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/209
2022-02-03T07:53:45Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 6, No 2 (2021): June 2021; 46-52
Fixed-Bed Column for the Removal of Cd(II) from Aqueous by Hydroxyapatite from Red Snapper (Lutjanus campechanus) Fish Bone
Purwaningrum, Widia; Universitas Sriwijaya
Riyanti, Fahma; Universitas Sriwijaya
Said, Muhammad; Universitas Sriwijaya
Hariani, Poedji Loekitowati; Universitas Sriwijaya
Handayani, Aria Septi; Universitas Sriwijaya
2021-06-18 21:01:24
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/209
en
The Synthesis of hydroxyapatite from Red Snapper (Lutjanus campechanus) fish bone carried out. Hydroxyapatite is utilized for Cd(II) sorption from solution using a fixed-bed column. Hydroxyapatite was characterized using X-ray Diffraction, Fourier Transform Infra-Red, Scanning Electron Microscope-Electron Dispersive, and Thermogravimetric. In fixed-bed column, the influence of bed height (5, 10, 15 cm) and flow rate (6, 8 and 10 mL/min) were studied. The highest adsorption capacity is obtained at a bed height of 15 cm, and a flow rate of 6 mL/min with adsorption capacity is 47.027 mg/g. The predicted by Bed Depth Service Time (BDST) model obtained that value of R2 in the range 0.9964-0.9997. The adsorption capacity per unit volume ( is in the range 141.12-222.89 mg/L while is in the range 0.0136-0.022 L/mg h. This indicates that BDST can be used to explain the performance of Cd(II) sorption onto hydroxyapatite by fix-bed column.
oai:ijfac.unsri.ac.id:article/264
2023-05-02T04:02:34Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/264
2023-05-02T04:02:34Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 7, No 3 (2022): October 2022; 106-112
Comparison of Acidity Test Method of Nickel Phosphate Silica Catalyst for Production Levulinic Acid from Glucose
Putri, Qodria Utami; Sriwijaya University
Hasanudin, Hasanudin
Mara, Ady
2022-10-28 19:45:01
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/264
en
The reaction of levulinic acid production from glucose has a reaction stage that requires a high temperature and high activation energy so that in this levulinic acid production reaction a catalyst is needed. The required catalyst must have a lewis acid site and a bronsted acid site so that the acidity of the catalyst is very influential for the successful production of levulonic acid. Silica nickel phosphate catalysts have lewis acid sites from Ni metal and bronsted acid sites from phosphoric and silica groups. The acidity of the catalyst was measured using the pyridine and ammonia adsorption method and the acidity center strength method using the TGA-DTA base adsorption-desorption. The adsorption of ammonia and pyridine uses the gravimetric method so that it can easily obtain the amount of total acidity of the catalyst and the acidity of the catalyst surface while the TGA-DTA method shows the acid strength of the actual catalyst, which is the real state of the catalyst when catalyzing a reaction and shows the catalyst's resistance to high temperatures. These two methods of measuring acidity have the same disadvantage that they cannot show and know the number of lewis acid sites and bronsted acid sites.
oai:ijfac.unsri.ac.id:article/72
2018-02-20T03:08:44Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/72
2018-02-20T03:08:44Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 2, No 3 (2017): October 2017; 62-65
Water pollution evaluation as consequent of old wells oil exploration
Sopeana, Sriyani; Dept. of Environmental
School of Post Graduate
Sriwijaya University
Ibrahim, Eddy; Department of Mining Engineering, Universitas Sriwijaya
Faizal, Muhammad; Department of Chemical Engineering, Universitas Sriwijaya
2017-11-01 09:32:26
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/72
en
This research was aimed to investigate effect of oil spills on surface water from exploration in Dutch well.The investigation was carried out by in situ measurement of some parameters.Water sample was collected by grab sampling method and the analysis was conducted at Laboratory of Environment Badan Lingkungan Hidup dan Penelitian Pengembangan (BLHPP) Kabupaten Musi Banyuasin.The measurement result showed that some parameters did not fulfill the requirement of Standar Quality for Domestic Water Regulation according to Government Regulation No. 82 year 2001 i.e. COD and Oil&Fat content. The surface water and shallow ground water quality had some parameters that did not comply with standar quality according to regulation such as BOD, COD, DO, and oil-fat content.Calculation of pollution indeks (PI) showed that domestic water has 3.26 and was categorized into slightly polluted. At surface water in Angit River, the calculation of PI showed that upstream river was slightly polluted (3.23), while midstream was slightly polluted (3.22) and in downstream river was mildly polluted (9.60).
oai:ijfac.unsri.ac.id:article/193
2021-05-24T04:04:41Z
ijfac:ART
v2
https://ijfac.unsri.ac.id/index.php/ijfac/article/view/193
2021-05-24T04:04:41Z
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Vol 5, No 3 (2020): October 2020; 78-87
Comparison Study of PHBA-intercalated Mg/Al-LDH and PHBA-immobilized Mg/Al-LDH: Characterization and Application for [AuCl4]̄ Removal from Solution
Hasnowo, Lutfi Aditya; Polytechnic Institute of Nuclear Technology
Santosa, Sri Juari; Universitas Gadjah Mada
Rusdiarso, Bambang; Universitas Gadjah Mada
2020-10-20 11:33:45
Open Access authors retain the copyrights of their papers, and all open access articles are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided that the original work is properly cited.The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.While the advice and information in this journal are believed to be true and accurate on the date of its going to press, neither the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
url:https://ijfac.unsri.ac.id/index.php/ijfac/article/view/193
Indonesia Endowment Fund for Education (LPDP)
en
Synthesis of p-hydroxybenzoic acid (PHBA)-intercalated Mg/Al-LDH and PHBA-immobilized Mg/Al-LDH have been conducted. PHBA-intercalated Mg/Al-LDH hybrid was synthesized by co-assembly process of Mg/Al-LDH nanosheets and PHBA anions. PHBA-immobilized Mg/Al-LDH was prepared by indirect synthesis, where PHBA anions were attached on surface of the Mg/Al-LDH material. Characterization by X-ray Diffraction showed that the PHBA-intercalated Mg/Al-LDH hybrid has the lattice parameter of a=3.02 Å, lattice parameter of c=46.77 Å and basal spacing d003=15.14 Å, where PHBA has been intercalated in interlayer of the hybrid. The PHBA-immobilized Mg/Al-LDH has lattice parameter of a=3.06 Å, lattice parameter of c=23.70 Å and basal spacing d003=7.90 Å. The analytical result confirmed that PHBA has been attached on surface of the hybrid for PHBA-immobilized Mg/Al-LDH. The optimum 10 mL of [AuCl4]‾ 100 mg L-1 removal condition of both hybrids were reached at pH 3. The optimum interaction time of [AuCl4]‾ and PHBA-intercalated Mg/Al-LDH hybrid was 250 minutes, respectively, while that for [AuCl4]‾ and PHBA-immobilized Mg/Al-LDH was 150 minutes. Removal of [AuCl4]‾ by PHBA-intercalated Mg/Al-LDH hybrid followed pseudo second order kinetic, whereas by PHBA-immobilized Mg/Al-LDH followed pseudo first order kinetic. Characterization using stereo photomicroscope confirmed that [AuCl4]‾ could be reduced to Au metal by both hybrids.
e549e835d83d6907bb4432ed1d24b6c5