Equilibrium sorption of copper(II)-ethylenediaminetetraacetic acid chelates onto cross-linked, polyaminated chitosan beads

摘要

The sorption equilibria of copper(II) chelates of EDTA (ethylenediaminetertaacetic acid) from an equimolar solution with cross-linked, polyaminated chitosan beads were investigated. The polyamination was done by introducing different molecular weights of water-soluble poly- (ethylenimine) (PEI). Experiments were carried out as a function of the pH, concentration of Cu(II) ions, and temperature. It was shown that whether the initial aqueous phase eas acidic Or basic, it tended to become neutral after sorption.