文献类型：期刊文献

英文题名：Non-Polyamide Based Nanofiltration Membranes Using Green Metal-Organic Coordination Complexes: Implications for the Removal of Trace Organic Contaminants

作者：Guo, Hao[1];Peng, Lu Elfa[1];Yao, Zhikan[1];Yang, Zhe[1];Ma, Xiaohua[1,2];Tang, Chuyang Y.[1]

机构：[1]Univ Hong Kong, Dept Civil Engn, Pokfulam, Hong Kong, Peoples R China;[2]East China Univ Sci & Technol, Chem Engn Res Ctr, Shanghai Key Lab Multiphase Mat Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2019

卷号：53

期号：5

起止页码：2688

外文期刊名：ENVIRONMENTAL SCIENCE & TECHNOLOGY

收录：;EI(收录号：20191006591869);WOS:【SCI-EXPANDED(收录号:WOS:000460709100044)】；

基金：The study is supported by the Innovation and Technology Commission of Hong Kong Government (Project number ITS/428/16). We also appreciate the partial support received from NSFC/RGC Joint Research Scheme sponsored by the Research Grants Council of Hong Kong and the National Natural Science Foundation of China (N_HKU706/16). We thank Dow Chemical Company for providing membrane samples and Miss. Vicky Fung for TOC analysis. The School of Biological Science in The University of Hong Kong is appreciated for providing the instrumental analysis platform.

语种：英文

外文关键词：Sodium chloride - Composite membranes - Iron compounds - Organometallics - Seawater - Sodium sulfate - Sulfur compounds - Wastewater treatment - Water filtration - Nanocomposite films - Chemicals removal (water treatment) - Trace elements - Molar ratio - Nanofiltration

摘要：Polyamide-based thin film composite (TFC) membranes are generally optimized for salt rejection but not for the removal of trace organic contaminants (TrOCs). The insufficient rejection of TrOCs such as endocrine disrupting compounds (EDCs) by polyamide membranes can jeopardize product water safety in wastewater reclamation. In this study, we report a novel nonpolyamide membrane chemistry using green tannic acid-iron (TA-Fe) complexes to remove TrOCs. The nanofiltration membrane formed at a TA-Fe molar ratio of 1:3 (TA-Fe3) had a continuous thin rejection layer of 10-30 nm in thickness, together with a water permeability of 5.1 Lm(2)-h(-1)bar(-1) and a Na2SO4 rejection of 89.7%. Meanwhile, this membrane presented significantly higher rejection of EDCs (up to 99.7%) than that of polyamide membranes (up to 81.8%). Quartz crystal microbalance results revealed that the sorption amount of a model EDC, benzylparbaen, by TA-Fe3 layer was nearly 2 orders of magnitude less than that by polyamide, leading to reduced transmission and higher rejection. Further analysis of membrane revealed a much greater water/EDC selectivity of the TA-Fe3 membrane compared to the polyamide membranes.