Removal of Cu2+ and turbidity from wastewater by mercaptoacetyl chitosan

被引：71
作者：
Chang, Qing [1 ]
Zhang, Min [1 ]
Wang, Jinxi [1 ]
机构：
[1] Lanzhou Jiaotong Univ, Sch Environm & Municipal Engn, Lanzhou 730070, Gansu, Peoples R China
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2009年 / 169卷 / 1-3期
基金：
中国国家自然科学基金;
关键词：
Flocculation; Mercaptoacetyl chitosan; Copper; Chitosan; Mercaptoacetic acid; PROTEINS;
D O I：
10.1016/j.jhazmat.2009.03.144
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A macromolecule heavy metal flocculant mercaptoacetyl chitosan (MAC) was prepared by reacting chitosan with mercaptoacetic acid. In preliminary experiments, the flocculation performance of MAC was evaluated by using wastewater containing Cu2+ or/and turbidity. Some factors which affect the removal of Cu2+ and turbidity were also studied. The experimental results showed that: (1) MAC can remove both Cu2+ and turbidity from wastewater. The removal efficiency of Cu2+ by using MAC combined with hydrolyzed polyacrylamide is higher than that by only using MAC, the removal efficiency of Cu2+ reaches above 98%; (2) when water sample containing not only Cu2+ but also turbidity-causing substance, the removal efficiency of both Cu2+ and turbidity will be promoted by the cooperation effect of each other, the residual concentration of Cu2+ reaches below 0.5 mgL(-1) and the turbidity reaches below 3 NTU, Cu2+ is more easily removed by MAC when turbidity is higher: (3) the removal efficiency of Cu2+ increases with the increase in pH value, contrarily removal efficiency of turbidity decreases with the increase in pH value. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：621 / 625
页数：5
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