新型含硫高分子絮凝剂PEX对废水中Cd^(2+)的去除  

Removal of Cadmium Ions in Wastewater with Novel Macromolecule Flocculant PEX Containing Sulfur

作　　者：张明月[1] 王刚[1] 常青[1] 韩晓婷[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

出　　处：《电镀与环保》2013年第3期35-38,共4页Electroplating & Pollution Control

基　　金：金川公司-兰州交通大学预研基金(No.420032)

摘　　要：为寻求高效易行的含镉废水处理方法,合成了含硫高分子絮凝剂PEX。研究了其在不同pH值及Cd2+的初始质量浓度下对Cd2+的捕集性能,并对一些影响因素做了考察。结果表明:PEX对Cd2+的去除效果很好;pH值对去除Cd2+有一定影响,pH值为5.0时的去除率较高;共存阳离子和有机配位剂对PEX去除Cd2+的影响不尽相同;致浊物的存在对PEX去除Cd2+有明显的促进作用;与PEI,DDTC相比,PEX去除Cd2+的优势显著。In order to seek a high-efficiency and easy-to-operate method for treating wastewater containing cadmium, macromolecule flocculant PEX containing sulfur was synthesized. The trapping performance of PEX on Cd^2＋ was evaluated with different pH values and different initial concentrations of Cd^2＋ ; and some influencing factors on removal of Cd^2＋ were also investigated. The results show that floeculant PEX has a very good effect on removal of Cd^2＋ ; pH value has a certain influence on removal of Cd^2＋ , a better removal rate of Cd^2＋ can be obtained at pH 5.0; the influence of co-existing cations and organic coordination agents on removal of Cd^2＋ is not quite the same; existence of turbidity would remarkably promote the removal of Cd^2＋ ; compared with PEI and DDTC, PEX has a notable superiority in removal of cadmium.

关 键 词：高分子絮凝剂 重金属 含镉废水 螯合沉淀 

分 类 号：X781.1[环境科学与工程—环境工程]