基于Donnan dialysis原理，在无外加电压作用下采用阳离子交换膜分离去除原水中的Cu2+，研究pH值对阳离子交换膜分离去除Cu2+效果的影响。研究结果表明：原水及补偿离子溶液pH≥4时，H+浓度较低，其对阳离子交换膜分离去除Cu2+无明显影响，去除率均在85%左右；原水pH=3时，阳离子交换膜分离去除Cu2+的能力降低，去除率为60~62%左右；原水pH=6，补偿离子溶液pH=3时，H+与补偿离子K+具有累加作用，但累加作用不明显，Cu2+去除率只有少量增加。

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.

[1]   Kessler S B, Klein E. Membrane Handbook[M]. Van Nostrand Reinhold: New York, 1992. 210.
[2]   Fonseca A D, Crespo J G., Almeida J S, et al. Drinking Water denitrification using a novel ion-exchange membrane bioreactor[J]. Environ Sci Technol, 2000, 34(8): 1557-1562.
[3]   Velizarov S, Reis M A, Crespo J G,  et al. Integrated transport and reaction in an ion exchange membrane bioreactor[J]. Desalination, 2002, 217(1-3): 205-210.
[4]   Matos C T, Velizarov S, Grespo J G, et al. Simultaneous removal of perchlorate and nitrate from drinking water using the ion exchange membrane bioreactor concept[J]. Water Res, 2006, 40(2): 231-240.
[5]   Velizarov S, Reis M A, Crespo J G, et al. Removal of trace mono-valent inorganic pollutants in an ion exchange membrane bioreactor: analysis of transport rate in a denitrification process[J]. J Membr Sci, 2003, 217(1-2): 269-284.
[6]  Crespo J G, Velizarov S, Reis M A, et al. Membrane bioreactors for the removal of anionic micropollutants from drinking water[J]. Curr Opin Biotechnol, 2004, 15(5): 463-468.
[7]  Velizarov S, Matos C T, Reis M, et al. Removal of inorganic charged micropollutants in an ion-exchange membrane bioreactor[J]. Desalination, 2005, 178(1-3): 203-210.
[8]  Matos C T, Fortunato R, Velizarov S, et al. Removal of mono-valent oxyanions from water in an ion exchange membrane bioreactor: Influence of membrane permselectivity[J]. Water Res, 2008, 42(6-7): 1785-1795.
[9]  Matos C T, Sequeira A M, Velizarov S, et al. Nitrate removal in a closed marine system through the ion exchange membrane bioreactor[J]. J Hazard Mater, 2009, 166(1): 428-434.
[10]  Oehmen A, Viegas R, Velizarov S, et al. Removal of heavy metals from drinking water supplies through the ion exchange membrane bioreactor[J]. Desalination, 2006, 199 (1-3): 405-407.
[11]  Hichour M, Persin F, Sandeaux J, et al. Fluoride removal from waters by donnan dialysis[J]. Sep Purif Technol, 2000, 18(1): 1–11.
[12]  Tor A. Removal of fluoride from water using anion-exchange membrane under donnan dialysis condition[J]. J Hazard Mater, 2007, 141(3): 814–818.
[13]  Hichour M, Persin F, Molenat J, et al.  Removal of fluoride from diluted solutions by donnan dialysis with anion-exchange membranes[J]. Desalination, 1999, 122(1): 53-62.
[14]  Garmes H, Persinb F, Sandeauxb J, et al. Defluoridation of groundwater by a hybrid process combining adsorption and donnan dialysis[J]. Desalination, 2002, 145(1-3): 287-291.
[15]  Durmaz F, Kara H, Cengeloglu Y, et al. Fluoride removal by donnan dialysis with anion exchange membranes[J]. Desalination, 2005, 177(1-3): 51-57
[16]  Kir E, Alkan E. Fluoride removal by donnan dialysis with plasma-modified and unmodified anion exchange membranes[J]. Desalination, 2006, 197(1-3): l217-224.
[17]  Ruiz T, Persin F, Hichour M, et al. Modelisation of fluoride removal in donnan dialysis[J]. J Membr Sci, 2003, 212(1-2): 113-121.
[18] Alkan E, K?r E, Oksuz L. Plasma modification of the anion-exchange membrane and its influence on fluoride removal from water[J]. Sep Purif Technol, 2008, 61(3): 455-460.
[19]  Kalis E J J, Weng L, Dousma F, et al. Measuring free metal ion concentrations in situ in natural waters using the donnan membrane technique[J]. Environ Sci Technol, 2006, 40(3): 955-961.
[20]  Kalis E J J, Weng L, Erwin J M. Temminghoff. Measuring free metal ion concentrations in multicomponent solutions using the donnan membrane technique[J]. Anal　Chem, 2007, 79(4): 1555-1563.
[21]  谢德华,施周,陈世洋等. 基于Donnan dialysis原理阳离子交换膜对Cu2+、Mn2+、Zn2+去除能力的研究[J]. 环境科学, 2010, 31(9):114-118.
[22]  谢德华,施周,谢鹏等. 颗粒物对无电压作用下离子交换膜分离去除铜离子的影响[J]. 环境工程学报, 2010, 4(6):1247-1250.
[23]  谢德华,施周,陈世洋等. 无电压作用离子交换膜分离去除水中锰离子的研究[J]. 湖南大学学报自然科学版, 2010, 37(4):67-71.