文献类型：期刊文献

英文题名：Dual-functional adsorptive membranes for PFAS removal: Mechanism, CFD simulation, and selective enrichment

作者：Wan, Hongyi[1,2];Fang, Fumohan[1];Shi, Ke[1];Yi, Zhiyuan[1];Zeng, Lelin[2];Bhattacharyya, Dibakar[3];Tang, Kewen[2];Xu, Zhi[1,4]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[2]Hunan Inst Sci & Technol, Dept Chem & Chem Engn, Yueyang 414006, Hunan, Peoples R China;[3]Univ Kentucky, Dept Chem & Mat Engn, Lexington, KY 40506 USA;[4]East China Univ Sci & Technol, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2024

卷号：500

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20244317240731);WOS:【SCI-EXPANDED(收录号:WOS:001341260800001)】；

基金：This work was supported the National Natural Science Foundation of China (22208097 & 22075076) , the Hunan Provincial Natural Science Foundation of China (2024JJ6229 & 2022JJ30278) , Scientific Research Project of the Education Department of Hunan Province (23B0635) , the Hunan Province Xiaohe Talent Program (2024TJ-X01) , and Shanghai Pilot Program for Basic Research (22TQ1400100-4) . We highly appre-ciate the collaborations with the University of Kentucky NIEHS Super-fund center (P42ES007380) .

语种：英文

外文关键词：Membrane adsorption; CFD simulation; Morphology optimization; Selective interception; Selective enrichment

摘要：The remediation of emerging water contaminants, particularly per- and polyfluoroalkyl substances (PFAS), presents challenges due to their refractory nature and the presence of competing substances. Dual-functional adsorptive membranes, with hydrophobic backbone and quaternary ammonium moieties, were thereby designed to selectively intercept organic competitors while enrich PFAS. A 96.8 % removal of perfluorooctanoic acid (PFOA) was achieved and this effective removal (>90 %) maintained across five reuse cycles with a total treatment capacity of 650 L m(-2). Rather than the rejection mechanism of nanofiltration process, these adsorptive membranes utilize synergistic electrostatic attraction and hydrophobic interactions, leading to a greater enrichment factor of 18.5 (PFOA over humic acid) and a permeability of 34.6 L m(-2)h(-1) bar(-1) (1.9- and 4.5-fold higher than reported NF 270 membranes, respectively). Furthermore, computational fluid dynamics (CFD) modeling revealed that the sponge-like matrix effectively prevents channeling flow and enhance access to adsorption sites. Sensitivity analysis and the high Damkohler number indicated that the adsorption process is mass transfer-controlled, with the key parameters ranked in order of significance: residence time > fluid viscosity > intrinsic adsorption rate. With consistent removal performance with co-existing competitors, efficient regeneration, and reusability, the dual-functional adsorptive membranes offer promising practical efficacy for PFAS remediation.