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Effect of pH to copper ion removal by using cation exchange membrane

Authors： XIE Dehua1,2, SHI Zhou1, FENG Huayang1, CHEN Shiyang1, SONG yong1

Units： 1. College of Civil Engineering, Hunan University, Changsha 410082, China; 2. College of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China

KeyWords： cation exchange membrane; donnan dialysis; copper ions; pH

ClassificationCode：TQ028,X505

year,volume(issue):pagination： 2011,31(4):31-35

Abstract：

Based on donnan dialysis theory, effect of pH on copper ion removal is investigated when the cation exchange membrane is applied to remove copper ion without external power input. The following results are obtained: the concentration of hydrogen ion is low and has no obvious effect on the removal rate which was about 85%, when pH of raw water and the compensation ion solution is pH≥4; the capacity of the cation exchange membrane to remove Cu2 + decreases when pH of raw water is 3, and the removal rate is about 60%~62%; hydrogen ions and the compensation potassium ions have cumulative effect but it is not obvious, when pH of raw water is 6 and pH of the compensation ion solution is 3, and the removal rate of Cu2 + has only a small increase.

Funds：

国家自然科学基金项目(50778065)

AuthorIntro：

谢德华(1974 ~ )，男，湖北武汉人，博士研究生，主要研究方向为水处理理论与技术。E-mail: xiedehua19740928@sina.com

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