为了处理水中重金属离子,制备了系列壳聚糖修饰物(x-CTS):戊二醛交联壳聚糖(GC)、邻苯二甲酸二丁酯致壳聚糖多孔膜(DBP-C)、壳聚糖凝胶珠(CHD),对目标产物进行了表征,并将目标产物对水环境中的重金属离子Cr(VI),Cd2+,Pb2+进行了吸附研究.试验表明,在试验条件下,GC对相同质量浓度Cr(Ⅵ)和Pb2+的吸附率可达到99.6%以上,远大于对Cd2+的吸附;CHD的饱和吸附量为:Pb2+》Cr(Ⅵ)》Cd2+;DBP-C的配比为1:4时,吸附效果最好.同时,研究了1:4配比DBP-C对Cd+2的静、动态吸附,以及pH、温度、浓度等试验条件对Cd2+吸附的影响,确定了最佳吸附条件.
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