文献类型：期刊文献

英文题名：Degradation of Polyamide Nanofiltration Membranes by Bromine: Changes of Physiochemical Properties and Filtration Performance

作者：Zhao, Huihui[1];Yang, Linyan[1,3,4];Chen, Xueming[2];Sheng, Mei[1];Cao, Guomin[1,3,4];Cai, Lankun[1,3];Meng, Shujuan[5];Tang, Chuyang Y.[6]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[2]Fuzhou Univ, Coll Environm & Resources, Fujian Prov Engn Res Ctr Rural Waste Recycling Te, Fuzhou 350116, Fujian, Peoples R China;[3]East China Univ Sci & Technol, Natl Engn Lab Ind Wastewater Treatment, Shanghai 200237, Peoples R China;[4]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China;[5]Beihang Univ, Sch Space & Environm, Beijing 100191, Peoples R China;[6]Univ Hong Kong, Dept Civil Engn, Pokfulam, Hong Kong, Peoples R China

年份：2021

卷号：55

期号：9

起止页码：6329

外文期刊名：ENVIRONMENTAL SCIENCE & TECHNOLOGY

收录：;EI(收录号：20211810303193);WOS:【SCI-EXPANDED(收录号:WOS:000648515400071)】；

基金：This study was sponsored by the Natural Science Foundation of Shanghai (19ZR1412800) and the National Key R&D Program (2019YFC0408202).

语种：英文

外文关键词：Nanofiltration - Physicochemical properties - Aromatic compounds - Nanofiltration membranes - Hydrophilicity - Hydrophobicity - Water filtration - Water treatment - Microfiltration - Surface chemistry

摘要：The potential coexistence and interaction of bromine and polyamide membranes during membrane-based water treatment prompts us to investigate the effect of bromine on membrane performance. For fully aromatic polyamide membrane NF90 exposed under a mild bromination condition (10 mg/L), bromine incorporation resulted in more negatively charged (-13 vs -25 mV) and hydrophobic (55.2 vs 58.9 degrees) surfaces and narrower pore channels (0.3 vs 0.29 nm). The permeabilities of water and neutral solutes were reduced by 64 and 69-87%, respectively, which was attributed to the decreased effective pore radius and hydrophilicity. NaCl permeability was reduced by 90% as a synergistic result of enhanced size exclusion and charge repulsion. The further exposure (100 and 500 mg/L bromine) resulted in a more hydrophobic surface (61.7 and 65.5 degrees) and the minor further reduction for water and solute permeabilities (1-9%). Compared with chlorine, the different incorporation efficiency and properties (e.g., atomic size, hydrophilicity) of bromine resulted in opposite trends and/or different degrees for the variation of physicochemical properties and filtration performance of membranes. The bromine incorporation, the shift and disappearance of three characteristic bands, and the increased O/N ratio and calcium content indicated the degradation pathways of N-bromination and bromination-promoted hydrolysis under mild bromination conditions (480 mg/L.h). The further ring-bromination occurred after severe bromine exposure (4800-24,000 mg/L.h). The semi-aromatic polyamide membrane NF270 underwent a similar but less significant deteriorated filtration performance compared with NF90, which requires a different explanation.