文献类型：期刊文献

英文题名：Hydrophilic Membranes for Effective Removal of Pfas from Water: Anti-Fouling, Durability, and Reusability

作者：Fang, Fumohan[1]; Chen, Shiyuan[1]; Shi, Ke[1]; Xu, Sunjie[1]; Yi, Zhiyuan[1]; Lei, Linfeng[1]; Zhuang, Linzhou[1]; Wan, Hongyi[1,2]; Xu, Zhi[1]

机构：[1] School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Hunan, Yueyang, 414000, China

年份：2023

外文期刊名：SSRN

收录：EI(收录号：20230379661)

语种：英文

外文关键词：Durability - Efficiency - Fouling - Grafting (chemical) - Membranes

摘要：Per- and polyfluoroalkyl substances (PFAS) are emerging contaminants in natural water. The polyacrylonitrile membrane, grafted with tertiary amino group, and subsequently quaternized, was developed to effectively adsorb PFAS in the presence of co-existing competitors. It achieved over 98% removal of perfluorooctane sulfonic acid (PFOS) at neutral pH. Over 90% removal efficiency was recovered within four cycles through eluent regeneration. The removal mechanism was determined, through advanced characterization and theoretical analysis, as a synergistic process of electrostatic, hydrophobic, and dipole-dipole interactions. To address potential competition in adsorption caused by natural organic matter (NOM), membrane pores were regulated to achieve selective interception of humic acid (HA, a representative NOM). Effective PFOS removal (98.4%) maintained in the presence of abundant competitors. Furthermore, the mild regeneration method led to a flux recovery rate of 99.0%, underscoring its resistance to contamination. The effects of versatile NOM and surfactants were also evaluated, that insignificant reduction in removal efficiency was observed. After 144th regeneration cycles (equivalent), ? 2023, The Authors. All rights reserved.