文献类型：期刊文献

英文题名：High efficient dye removal with hydrolyzed ethanolamine-Polyacrylonitrile UF membrane: Rejection of anionic dye and selective adsorption of cationic dye

作者：Yun, Jianhua[1];Wang, Yixing[1];Liu, Zhenying[1];Li, Yujie[1];Yang, Hu[1];Xu, Zhen-liang[1]

机构：[1]East China Univ Sci & Technol, Chem Engn Res Ctr, State Key Lab Chem Engn, Membrane Sci & Engn R&D Lab, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2020

卷号：259

外文期刊名：CHEMOSPHERE

收录：;EI(收录号：20202608875127);WOS:【SCI-EXPANDED(收录号:WOS:000566573600018)】；

语种：英文

外文关键词：Dye removal; PAN UF membrane; Hydrolysis; Immobile electrical double layer

摘要：The dye-water treatment using UF membrane is still a challenge. In the present study, the optimized PAN-ETA ultrafiltration membrane was hydrolyzed and subsequently characterized by SEM, IR, CA, XPS, NMR, mechanic measurement, etc. The obtained membrane (H-PAN-ETA) was used for dye removal and it showed both an excellent anti-dye fouling and a good rejection property for anionic dyes. I.e. 96% rejection for methyl blue (MB), 99% for congo red (CR), 94% for acid fuchsin (AF) with no sign of contamination by dye. The flux of H-PAN-ETA membrane maintained at 50-53 L m(-2) center dot h(-1) during a 10-h filtration, which is higher than that of tight UF membranes reported. Meanwhile, H-PAN-ETA membrane was able to selectively remove cationic dyes, such as methylene blue (MEB), rhodamine B (RB) and, crystal violet (CV), or the mixture of anionic dye/cationic dye by adsorption process. Its adsorption capacity remained unchanged after 20 cycles. Finally, the immobile electrical double layer (EDL) theory combined with electrostatic force was introduced to explain the separation mechanism of charged UF membrane, which is helpful to instruct the preparation of UF membrane for dye removal. (C) 2020 Elsevier Ltd. All rights reserved.