不溶性淀粉黄原酸盐对Cu^(2+)和Zn^(2+)的吸附

Research on Adsorption of Cu^(2+) and Zn^(2+) with Insoluble Starch Xanthogenate

以淀粉为原料、环氧氯丙烷为交联剂,通过与丙烯腈接枝共聚,制备了不溶性淀粉黄原酸盐(ISX)。将ISX用于吸附模拟废水中的Cu2+或Zn2+离子,通过试验得出了吸附的适宜条件。对试验结果的分析表明:Cu2+和Zn2+在ISX上的等温吸附过程较适合用Langmuir等温式描述,动力学行为较适合用准二级动力学方程描述;吸附属自发的物理吸附。

The insoluble starch xanthogenate（ISX） has been synthesized by starch with epichlorohydrin as cross-linking agent and graft-copolymerized with acrylonitrile.The adsorption of Cu2＋ and Zn2＋ from simulated wastewater with ISX were investigated.The optimum adsorption conditions of ISX for Cu2＋ and Zn2＋ were determined.The tests result showed that the adsorption of Cu2＋ and Zn2＋ with ISX could be attributed to Langmiur isotherms type,and the adsorption kinetic was adapted to the second-order reaction.Meanwhile,this adsorption belongs to the spontaneous physical absorption.