Cu^(2+)印迹杂化膜的制备、表征及其吸附特性优化

Preparation,characterization of Cu^(2+)-imprinted hybrid membrane and optimization of its adsorption characteristic

以壳聚糖/TiO2杂化材料为功能基体,采用分子印迹技术制备了Cu2+印迹杂化膜,并利用红外光谱分析对其进行了表征.吸附选择性研究结果表明:在含等浓度Cu2+、Zn2+和Pb2+的水溶液中,印迹杂化膜表现出对Cu2+具有良好的吸附选择性.通过SAS软件对印迹杂化膜吸附Cu2+的吸附条件进行优化,结果表明最佳吸附条件为:pH约3.6,铜离子浓度99 mg/L,温度60℃,理论吸附率最大响应值为88.97%.

With the chitosan/TiO2 hybrid material as the foundation matrix, Cu^2＋-imprinted chitosan/ TiO2 hybrid membrane was prepared via molecular imprinting technique. The imprinted chitosan/TiO2 hybrid membrane was characterized by IR and the adsorption selectivity was studied. The results indicated that Cu^2＋-imprinted hybrid membrane adsorbed more Cu^2＋ than that of the other two metal cations （Zn^2＋ and Pb^2＋）. Then, the SAS software was used to optimize the adsorption conditions. The optimum adsorption conditions were found to be pH=3.6, the Cu^2＋ concentration 99 mg/L, temperature 60℃. The predicted response value at stationary point was 88.97%.