Adsorption behaviour of metal ions on imprinted chitosan resin

A new method for preparation of metal ion imprinted chitosan resin, which c an considerably enhance the adsorption capacity and selectivity of the meta l ion is presented in this paper. The conditions influencing the preparatio n of chitosan imprinted resin such as the cross-linking agent, epichlororoh ydrin and ethylene glycol diglycidyl ether, and metal ion concentration are optimized. The chemical and the physical stability are also discussed and the imprinted chitosan resin can be used many times without losing adsorpti on capacity. The adsorption isotherms were studied and a new model was sugg ested to correlate the relationship of adsorption with pH and metal ion con centration. (C) 2001 Society of Chemical Industry.