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＋.
出处
《工业水处理》
CAS
CSCD
北大核心
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)
关键词
高分子重金属絮凝剂
壳聚糖
巯基乙酸
重金属
絮凝
macromolecule heavy metal flocculant
chitosan
mercaptoacetic acid
heavy metal
flocculation
