以天然壳聚糖(CS)和海藻酸钠(SA)为原料,在CaCl2作用下,制备了壳聚糖-海藻酸钠(CS-SA)吸附剂.采用红外光谱仪对CS-SA吸附剂官能团进行表征,表明壳聚糖和海藻酸钠之间产生了静电吸引作用.以含低浓度Cr(Ⅵ)的电镀废水为处理对象,考察了CS-SA用量、吸附时间和pH值对CS-SA吸附性能的影响,同时对吸附动力学进行了研究.结果表明:当pH=6,吸附时间为120 min,CS-SA用量为0.15 g时,离子去除率最高,达到了98.86％；吸附动力学最符合拟二级动力学方程.解吸-再生实验表明,CS-SA吸附剂可以再生使用.
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