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High-Efficiency Capture and Recovery of Anionic Perfluoroalkyl Substances from Water Using PVA/PDDA Nanofibrous Membranes with Near-Zero Energy Consumption
Environmental Science & Technology Letters ( IF 8.9 ) Pub Date : 2021-03-11 , DOI: 10.1021/acs.estlett.1c00128 Hao Guo 1 , Junwei Zhang 1 , Lu Elfa Peng 1 , Xianhui Li 1, 2 , Yiliang Chen 3 , Zhikan Yao 4 , Yiang Fan 1 , Kaimin Shih 1 , Chuyang Y. Tang 1
Environmental Science & Technology Letters ( IF 8.9 ) Pub Date : 2021-03-11 , DOI: 10.1021/acs.estlett.1c00128 Hao Guo 1 , Junwei Zhang 1 , Lu Elfa Peng 1 , Xianhui Li 1, 2 , Yiliang Chen 3 , Zhikan Yao 4 , Yiang Fan 1 , Kaimin Shih 1 , Chuyang Y. Tang 1
Affiliation
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Poly- and perfluoroalkyl substances (PFASs) have caused severe public concerns due to their toxicity and extensive occurrence in the aquatic environment. This study reports a highly porous amine-functionalized membrane for the rapid capture of GenX and other anionic PFASs [e.g., perfluorooctanesulfonate (PFOS) and perfluorooctanoic acid (PFOA)] from contaminated water with near-zero energy consumption. The optimized membrane, prepared by electrospinning of polydiallyldimethylammonium chloride using cross-linked poly(vinyl alcohol) as a binder, had a high water permeability of ∼2700 L m–2 h–1 kPa–1. This high permeability enabled rapid gravity-driven filtration of contaminated water with a merely 5 cm water head, corresponding to an estimated energy consumption of as little as 2.7 × 10–4 kWh/m3. Meanwhile, the membrane showed highly efficient capture of GenX (>97%), PFOS (>99%), and PFOA (>99%). A large capture capacity of 1.2 × 106 μg/m2 was demonstrated for GenX. The captured GenX was recovered and concentrated with a small-volume NaCl/methanol solution, which simultaneously regenerated the membrane for its reuse. Over a 12-cycle capture–recovery test, the membrane demonstrated a high GenX recovery ratio of 94% and a volumetric concentration factor of 40. Our study provides a promising strategy for effective capture and recovery of GenX to enable its sustainable control and remediation.
中文翻译：
使用PVA / PDDA纳米纤维膜（几乎零能耗）从水中高效捕获和回收阴离子全氟烷基物质
聚和全氟烷基物质（PFAS）由于其毒性和在水生环境中的广泛存在而引起了公众的严重关注。这项研究报告了一种高度多孔的胺官能化膜，可用于从污染的水中快速捕获GenX和其他阴离子PFAS（例如，全氟辛烷磺酸盐（PFOS）和全氟辛酸（PFOA）），并且能耗几乎为零。通过使用交联聚乙烯醇作为粘合剂对聚二烯丙基二甲基氯化铵进行静电纺丝而制备的优化膜，具有高达2700 L m –2 h –1 kPa –1的高透水性。。如此高的渗透性使得仅5 cm水头的重力水就能够快速重力驱动过滤，相当于估计的能量消耗仅为2.7×10 –4 kWh / m 3。同时，该膜表现出对GenX（> 97％），PFOS（> 99％）和PFOA（> 99％）的高效捕获。的1.2 A大捕获能力×10 6微克/米2已针对GenX进行了演示。回收捕获的GenX，并用小体积的NaCl /甲醇溶液浓缩，同时再生该膜以供重复使用。经过12个周期的捕获-回收测试，该膜显示出94％的高GenX回收率和40的体积浓缩系数。我们的研究为有效捕获和回收GenX提供了一种有前途的策略，以实现其可持续的控制和修复。
更新日期：2021-04-13
中文翻译：
使用PVA / PDDA纳米纤维膜（几乎零能耗）从水中高效捕获和回收阴离子全氟烷基物质
聚和全氟烷基物质（PFAS）由于其毒性和在水生环境中的广泛存在而引起了公众的严重关注。这项研究报告了一种高度多孔的胺官能化膜，可用于从污染的水中快速捕获GenX和其他阴离子PFAS（例如，全氟辛烷磺酸盐（PFOS）和全氟辛酸（PFOA）），并且能耗几乎为零。通过使用交联聚乙烯醇作为粘合剂对聚二烯丙基二甲基氯化铵进行静电纺丝而制备的优化膜，具有高达2700 L m –2 h –1 kPa –1的高透水性。。如此高的渗透性使得仅5 cm水头的重力水就能够快速重力驱动过滤，相当于估计的能量消耗仅为2.7×10 –4 kWh / m 3。同时，该膜表现出对GenX（> 97％），PFOS（> 99％）和PFOA（> 99％）的高效捕获。的1.2 A大捕获能力×10 6微克/米2已针对GenX进行了演示。回收捕获的GenX，并用小体积的NaCl /甲醇溶液浓缩，同时再生该膜以供重复使用。经过12个周期的捕获-回收测试，该膜显示出94％的高GenX回收率和40的体积浓缩系数。我们的研究为有效捕获和回收GenX提供了一种有前途的策略，以实现其可持续的控制和修复。
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