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Article: High-efficiency capture and recovery of anionic perfluoroalkyl substances from water using PVA/PDDA nanofibrous membranes with near-zero energy consumption
Title | High-efficiency capture and recovery of anionic perfluoroalkyl substances from water using PVA/PDDA nanofibrous membranes with near-zero energy consumption |
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Authors | |
Issue Date | 2021 |
Publisher | American Chemical Society. The Journal's web site is located at http://pubs.acs.org/toc/estlcu/current |
Citation | Environmental Science & Technology Letters, 2021, v. 8 n. 4, p. 350-355 How to Cite? |
Abstract | 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. |
Persistent Identifier | http://hdl.handle.net/10722/306218 |
ISSN | 2023 Impact Factor: 8.9 2023 SCImago Journal Rankings: 3.086 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Guo, H | - |
dc.contributor.author | Zhang, J | - |
dc.contributor.author | Peng, LE | - |
dc.contributor.author | Li, X | - |
dc.contributor.author | Chen, Y | - |
dc.contributor.author | Yao, Z | - |
dc.contributor.author | Fan, Y | - |
dc.contributor.author | Shih, K | - |
dc.contributor.author | Tang, CY | - |
dc.date.accessioned | 2021-10-20T10:20:28Z | - |
dc.date.available | 2021-10-20T10:20:28Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | Environmental Science & Technology Letters, 2021, v. 8 n. 4, p. 350-355 | - |
dc.identifier.issn | 2328-8930 | - |
dc.identifier.uri | http://hdl.handle.net/10722/306218 | - |
dc.description.abstract | 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. | - |
dc.language | eng | - |
dc.publisher | American Chemical Society. The Journal's web site is located at http://pubs.acs.org/toc/estlcu/current | - |
dc.relation.ispartof | Environmental Science & Technology Letters | - |
dc.rights | This document is the Accepted Manuscript version of a Published Work that appeared in final form in Environmental Science & Technology Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acs.estlett.1c00128 | - |
dc.title | High-efficiency capture and recovery of anionic perfluoroalkyl substances from water using PVA/PDDA nanofibrous membranes with near-zero energy consumption | - |
dc.type | Article | - |
dc.identifier.email | Guo, H: guohao7@hku.hk | - |
dc.identifier.email | Shih, K: kshih@hku.hk | - |
dc.identifier.email | Tang, CY: tangc@hku.hk | - |
dc.identifier.authority | Guo, H=rp02772 | - |
dc.identifier.authority | Shih, K=rp00167 | - |
dc.identifier.authority | Tang, CY=rp01765 | - |
dc.description.nature | postprint | - |
dc.identifier.doi | 10.1021/acs.estlett.1c00128 | - |
dc.identifier.scopus | eid_2-s2.0-85103520144 | - |
dc.identifier.hkuros | 326746 | - |
dc.identifier.volume | 8 | - |
dc.identifier.issue | 4 | - |
dc.identifier.spage | 350 | - |
dc.identifier.epage | 355 | - |
dc.identifier.isi | WOS:000640891100012 | - |
dc.publisher.place | United States | - |