正渗透协同电还原处理电镀含铬废水效能探究  

Study on the Efficiency of Forward Osmosis and Electroreduction in Treating Electroplating Wastewater Containing Chromium

作　　者：刘子曼 张捍民[1] 路梦洋 LIU Ziman;ZHANG Hanmin;LU Mengyang(Key Laboratory of Industrial Ecology and Environmental Engineering(MOE),School of Environmental Science and Technology,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学环境学院,工业生态与环境工程教育部重点实验室,辽宁大连116024

出　　处：《水处理技术》2024年第4期49-53,60,共6页Technology of Water Treatment

基　　金：国家自然科学基金(52170026)。

摘　　要：针对电镀废水中的六价金属铬危害大、难去除的问题,探究利用正渗透(FO)技术截留浓缩模拟含铬废水的性能,结果表明:随着原料液温度和pH的增加,水通量和截留效果均提升。在FO模式、40℃、pH=8.5条件下,可达到13.73 L/(m^(2)·h)的水通量和89.12%的Cr(Ⅵ)截留率。循环实验结果表明,CTA膜处理含铬废水具有可重复利用性。电化学处理实验结果显示,经正渗透浓缩后,Cr(Ⅵ)的去除率达到62.13%,是浓缩之前的2.16倍,是普通浓缩的4.77倍。FO过程中的反向溶质扩散对还原效率提升起到正向促进作用。As hexavalent metal chromium in electroplating wastewater is harmful and difficult to remove,we explore the performance of using forward osmosis(FO)technology to reject and concentrate simulated chromium-containing wastewater.Results show that the increase of temperature and pH of feed solution has a positive effect on the increase of water flux and the improvement of Cr(VI)retention.In FO mode,13.73 L/(m^(2)·h)water flux and 89.12%Cr(Ⅵ)retention can be achieved at pH 8.5,40℃.Results of circulation experiments further show that CTA membrane can be reused when treating wastewater containing chromium.Electrochemical experiment results show that the removal rate of Cr(Ⅵ)reaches 62.13%,which is 2.16 times as much as Without-Concentration and 4.77 times as much as Com-Concentration.The reverse solute diffusion in FO process plays a positive role in promoting the reduction efficiency.

关 键 词：正渗透 电镀废水 Cr(Ⅵ) 电化学还原 

分 类 号：X703.1[环境科学与工程—环境工程]