用于电镀废水处理的膜技术研究进展

Research progress of membrane technology in electroplating wastewater treatment

电镀废水排放量大、成分复杂,废水中的重金属离子对生物体的毒害大,膜技术因处理效果好、适应性强,成为电镀废水无害化高效处理的先进技术.概述了反渗透、纳滤、电渗析等常规脱盐膜技术在电镀废水处理中的研究现状,着重介绍了强化超滤、超/微滤膜本体改性、共混改性方法以及膜表面改性的应用特性,剖析了其结构设计与重金属去除性能的关系,指出了具有重金属吸附性能的复合膜发展方向,为深度处理电镀废水膜技术的选用提供指导,对促进新型膜技术的发展具有重要参考意义.

Electroplating wastewater has a large discharge and complex composition,which is toxic to organisms for the co-existing heavy metal ions.Membrane technology has been one of the advanced technologies in the harmless treatment of electroplating wastewater for its high treatment efficiency and strong a-daptability.This paper summarized research status of desalting membrane technologies in the treatment of electroplating wastewater,such as reverse osmosis(RO),nanofiltration(NF),electrodialysis(ED).The application characteristic of strengthen process,bulk modification,blending modification and surface modification of UF/MF were emphatically introduced.The relationship between the structure design and the performance of the removal of heavy metals was also analyzed.The development direction of composite membrane applied in adsorption of heavy metals was outlined?which provides guidance for the selection of membrane technology in deep treatment of electroplating wastewater and show great significance in promoting the development of new membrane technology.