巯基乙酰壳聚糖制备条件的优化及其絮凝性能  

Optimization of the preparation conditions of mercaptoacetyl chitosan and its flocculating capacity

作　　者：张翠玲[1,2] 常青[1,2] 黄丹[1] 

机构地区：[1]兰州交通大学环境与市政工程学院,甘肃兰州730070 [2]兰州交通大学寒区旱区水资源综合利用教育部工程研究中心,甘肃兰州730070

出　　处：《工业水处理》2010年第8期40-42,46,共4页Industrial Water Treatment

基　　金：国家自然科学基金项目(20377020);甘肃省水环境科学与工程创新梯队(2006-07)

摘　　要：通过正交试验研究了巯基乙酰壳聚糖(MAC)的最佳制备条件,探讨了MAC捕集重金属离子的机理,研究了pH、浊度对MAC除铜效果的影响,并对MAC去除重金属离子Cu2+、Cd2+、Ni2+的效果进行了对比。结果表明:制备MAC的最佳条件为:m(壳聚糖)∶m(巯基乙酸)为1∶2,pH为5.0,反应时间为3.5 h;水样浊度对铜离子的去除有促进作用;优化条件下,MAC对重金属离子的选择性顺序为Cd2+>Cu2+>Ni2+。The optimization of the preparation conditions of mercaptoacetyl chitosan（MAC） has been studied by us-ing the method of the orthogonal experiment,and the trapping mechanism of removing heavy metals has been dis-cussed.The effects of pH and turbidity on the removal of Cu2＋ is studied.The removals of Cu2＋,Cd2＋ and Ni2＋,are contrasted.The results show that the optimal preparation conditions are as follows：m（chitosan）∶m（mercaptoacetic acid） is 1∶2,pH is 5.0,and reaction time is 3.5 h.Turbidity has promoting effect on the removal of Cu2＋.Under optimum conditions,the selectivity order of MAC for these three kinds of heavy metal ions is Cd2＋Cu2＋Ni2＋.

关 键 词：高分子重金属絮凝剂 壳聚糖 巯基乙酸 重金属 絮凝 

分 类 号：X703[环境科学与工程—环境工程]