Modification of Cellulose with 4.4 Diaminodiphenylether-O-Hydroxibenzaldehide as Adsorbent and Its Application for Adsorbing Metalic Ion of Cd2+ In Aqueous Solution

Abstract

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⁺