交联羧甲基红薯淀粉吸附废水中Pb(上标 2+)的研究

In this manuscript the cross-linking carboxymethyl double modified sweet potato starch was prepared by 2-chioroacetic acid 3-chiorol, 2-epoxypropare eatalyzing with alkaline, and the adsorption process of Pb(Ⅱ) ions from aqueous solution by water-insoluble cross-linked carboxymethyl starch was investigated. Results showed adsorption capacity for Pb(Ⅱ) relate to starch substitution degree, starch content, Pb (Ⅱ) initiation concentration, adsorption temperature, pH and adsorption time. The adsorption equilibrium data followed well the Langmuir isotherm model, cross-linked carboxymethyl sweet potato starch possed well regeneration capability.