文献类型：期刊文献

英文题名：Separation of mono- and di-valent ions from seawater reverse osmosis brine using selective electrodialysis

作者：Yang, Ye[1,2];Sun, Yuzhu[1,2,3];Song, Xingfu[1,2];Yu, Jianguo[1,2]

机构：[1]Minist Educ, Engn Res Ctr Resource Proc Engn, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake R, Shanghai 200237, Peoples R China;[3]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2021

卷号：28

期号：15

起止页码：18754

外文期刊名：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

收录：;EI(收录号：20242616361166);WOS:【SCI-EXPANDED(收录号:WOS:000547236000016)】；

基金：The authors would like to thank the financial support from the National Key R&D Program (No. 2016YFC0401203), Natural Science Foundation of China (NSFC, No. U1507105), and Program of Shanghai Academic/Technology Research Leader (No. 18XD1424600).

语种：英文

外文关键词：Electrodialysis; Selective separation; Ion-exchange membranes; Brine; Purity; Energy consumption

摘要：As water scarcity has become a serious global issue, seawater reverse osmosis (SWRO) is considered as a promising technique to expand traditional water supplies. However, the reject brine from SWRO systems is still a major environmental concern. In this research, the monovalent selective electrodialysis (S-ED) was used to separate and recover one of the primary components, i.e., sodium chloride, from the SWRO brine, thereby avoiding the direct discharge of the brine and achieving the brine valorization. The permselectivity of selective ion-exchange membranes (IEMs) was elucidated by comparing with the standard IEMs in structure-property via membrane characterization techniques. Results indicated that the permselectivity of Selemion CSO membrane was attributed to the positive-charged layer with a low sulfonate/ammonium ratio of 1.28. Whereas the permselectivity of Selemion ASV membrane resulted from the highly cross-linked layer, according to the similar content of the fixed quaternary amines and the shift of the C-N absorption peak. In addition, the effects of the current density and temperature on the membrane performance were studied, including permselectivity (P-Mg2+(Na+) and P-SO42-(Cl-)), Na+ recovery, and specific energy consumption (E-SEC) Finally, the NaCl-rich brine with the total dissolved solid (TDS) value of 167.5 +/- 3.3 g/L was obtained using SWRO brine with the initial TDS of 76.8 g/L. The Na+/Mg2+ mass ratio of the concentrate was 222.4, compared with the initial value of 9.7 in SWRO brine.