分子印迹交联壳聚糖树脂对镉的吸附性能研究

Study on the adsorption performance of molecular imprinting cross-linked chitosan resin on cadmium

摘要: 采用分子印迹交联壳聚糖树脂（MICCR）为基础材料,研究MICCR对重金属Cd（Ⅱ）的吸附性能,考察pH对MICCR吸附性能的影响以及MICCR的重复吸附性能。结果表明:MICCR对重金属Cd（Ⅱ）的吸附容量为170.4mg/g,MICCR吸附Cd（Ⅱ）的最佳pH为4.5,其吸附较好地符合二级动力学模型,且吸附速率为6.97g·g^-1·h^-1。通过交联反应和分子印迹技术改进了壳聚糖吸附剂的重复吸附性能,且MICCR吸附镉的性能稳定。

Abstract: The objective of this study was using molecular imprinting cross-linked chitosan resin (MICCR) as basic material, to investigate MICCR on heavy metal adsorption properties of Cd (Ⅱ) , to examine the effect of the pH on the adsorption properties of MICCR, and to test the repeated adsorption performance of MICCR.Results showed that:the adsorption capacity of MICCR on Cd (Ⅱ) was 170.4mg/g, the optimal pH of MICCR adsorption on Cd (Ⅱ) was 4.5, the adsorption conformed to the second-order dynamic model better, and the adsorption rate was 6.97g·g～ (-1) ·h～ (-1) .The cross-linked reaction and molecular imprinting technique improved the adsorption properties of chitosan adsorbent, and the adsorption performance of MICCR on cadmium was stable.