高分子重金属絮凝剂CSAX处理铅锌废水  

Removal of Pb(Ⅱ) and Zn(Ⅱ) from wastewater by heavy metal floccufants CSAX

作　　者：席启斐[1] 王社宁[1] 常青[1] 伏小勇[1] 陈学民[1] 

机构地区：[1]兰州交通大学环境与市政工程学院,兰州730070

出　　处：《环境工程学报》2016年第8期4097-4103,共7页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(20377020)

摘　　要：合成了高分子重金属絮凝剂交联淀粉聚丙烯酰胺黄原酸酯(CSAX),研究了该絮凝剂处理铅锌废水的效能,考察了各因素对CSAX捕集Pb^(2+)和Zn^(2+)效果的影响,并将其应用于实际铅锌冶炼废水的处理以进行验证。结果表明,CSAX对Pb^(2+)和Zn^(2+)的捕集效率较高,Pb^(2+)去除率达95%以上,Zn^(2+)去除率可达90%。p H值对CSAX去除Pb^(2+)(Zn^(2+))有一定的影响,在p H<7的范围内,p H值越高,去除率越高;腐殖酸以及致浊物质能促进Pb^(2+)(Zn^(2+))的去除;EDTA明显抑制对Pb^(2+)(Zn^(2+))的去除;相比之下,碱金属、碱土金属以及部分配位能力弱的阴离子对Pb^(2+)和Zn^(2+)的去除率影响不大。The performance of synthesized flocculent crosslinked starch-graft-poly acrylamide-co-sodium xanthate（ CSAX） was evaluated for the flocculation of wastewater containing Pb^2＋and Zn^2＋,and some of the factors affecting the removal of Pb^2＋and Zn^2＋by CSAX were studied. Additionally,CSAX was applied to actual wastewater to verify its applicability. The results reveal that CSAX binds strongly with Pb^2＋and Zn^2＋,as the removal rates were above 95% for Pb^2＋and 90% for Zn^2＋,and p H value affected the removal rate of Pb^2＋and Zn^2＋,as the removal efficiency increased with increasing p H values in the range of p H 7. Humic acid and turbidity promoted the removal of Pb^2＋and Zn^2＋,whereas EDTA weakened the removal of Pb^2＋,especially the Pb^2＋. Akali metals,alkaline-earth metals,and some anions that have weak coordination ability have no effect on the removal of Pb^2＋and Zn^2＋.

关 键 词：高分子重金属絮凝剂 铅锌废水 絮凝 淀粉 

分 类 号：X703[环境科学与工程—环境工程]