Equilibrium and Kinetic studies on Pb2Â +, Cd2Â +, Cu2Â + and Ni2Â + Adsorption from aqueous solution by Resin 2, 2'- (Ethylenedithio)diethanol Immobilized Amberlite XAD-16 (EDTDE-AXAD-16) with Chlorosulphonic acid

The present study aims to investigate the adsorption behavior of Pb2 +, Cd2 +, Cu2 + and Ni2 + ions from aqueous solution onto modified Amberlite XAD-16 functionalized using 2, 2'- (Ethylenedithio) diethanol with chlorosulphonic acid. The batch equilibrium method was used for studying the metal sorption. It has been observed that the Pb(II) ion is highly adsorbed compared to other metal ions and the adsorption capacity was found to be in the sequence Pb2 + > Cd2 + > Ni2 +> Cu2 + and the preference of this sorbent for a metal may be explained on the basis of electronegativity of the metal ions and on the basis of hard - soft Lewis acids and bases concept. Adsorption kinetics was explained based on pseudo-first-order and pseudo-second order models. The data showed that the sorption of metal (II) ions on the chelating resin perfectly fit a pseudo-second-order model.