重金属絮凝剂二硫代羧基化壳聚糖对废水中铅锌的去除性能  

Removal of Lead and Zinc Ions in Waste Water with Heavy Metal Flocculant Dithiocarboxyl Chitosan

作　　者：杨凯 王刚[1] 陈学民[1] 王馨 彭小凤 YANG Kai;WANG Gang;CHEN Xue-min;WANG Xin;PENG Xiao-feng(School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)

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

出　　处：《兰州交通大学学报》2018年第1期97-102,共6页Journal of Lanzhou Jiaotong University

基　　金：国家自然科学基金(51368030)

摘　　要：以二硫代羧基化壳聚糖(DTCTS)为重金属絮凝剂,研究了该絮凝剂对废水中铅锌的去除性能,并对一些影响因素进行了考查.研究结果表明:DTCTS对Pb^(2+)、Zn^(2+)的捕集效率较高,去除率均可达95%以上;pH值对DTCTS去除Pb^(2+)、Zn^(2+)有一定的影响,当pH=6时,DTCTS对Pb^(2+)、Zn^(2+)去除效果最好;EDTA对Pb^(2+)、Zn^(2+)的去除有抑制作用;柠檬酸和氨基乙酸对Pb^(2+)的去除有一定的抑制,而对Zn^(2+)的去除影响甚微;焦磷酸钠及致浊物质的存在均能促进Pb^(2+)、Zn^(2+)的去除.The removal effect of the flocculant on Pb 2+and Zn 2+in waste water was investigated by using dithiocarboxyl chitosan(DTCTS)as the heavy metal flocculant,and the effects of some influencing factors were examined through a series of experiments.Results show that DTCTS exhibits strong collection efficiency for Pb 2+and Zn 2+,and the removal rates of Pb 2+and Zn 2+are higher than 95%.PH value has certain influence on removal effects of DTCTS on Pb 2+and Zn 2+.When pH value is 6.0,the best effect for the removal of Pb 2+and Zn 2+can be achieved.EDTA has a restraining effect on the removal of Pb 2+and Zn 2+.Citric acid and amino acetic acid can restrain the removal of Pb 2+,but have no effect on the removal of Zn 2+.Sodium pyrophosphate and turbidity can promote the removal rates of Pb 2+and Zn 2+.

关 键 词：高分子重金属絮凝剂 壳聚糖 铅锌废水 螯合沉淀 

分 类 号：X703.1[环境科学与工程—环境工程]