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Article: Does Surface Roughness Necessarily Increase the Fouling Propensity of Polyamide Reverse Osmosis Membranes by Humic Acid?

TitleDoes Surface Roughness Necessarily Increase the Fouling Propensity of Polyamide Reverse Osmosis Membranes by Humic Acid?
Authors
Keywordsfunnel effect
membrane fouling
nanovoid-containing roughness structure
polyamide reverse osmosis (RO) membranes
surface roughness
Issue Date31-Jan-2023
PublisherAmerican Chemical Society
Citation
Environmental Science and Technology, 2023, v. 57, n. 6, p. 2548-2556 How to Cite?
Abstract

Surface roughness has crucial influence on the fouling propensity of thin film composite (TFC) polyamide reverse osmosis (RO) membranes. A common wisdom is that rougher membranes tend to experience more severe fouling. In this study, we compared the fouling behaviors of a smooth polyamide membrane (RO-s) and a nanovoid-containing rough polyamide membrane (RO-r). Contrary to the traditional belief, we observed more severe fouling for RO-s, which can be ascribed to its uneven flux distribution caused by the "funnel effect". Additional tracer filtration tests using gold nanoparticles revealed a more patchlike particle deposition pattern, confirming the adverse impact of "funnel effect" on membrane water transport. In contrast, the experimentally observed lower fouling propensity of the nanovoid-containing rough membrane can be explained by: (1) the weakened "funnel effect" thanks to the presence of nanovoids, which can regulate the water transport pathway through the membrane and (2) the decreased average localized flux over the membrane surface due to the increased effective filtration area for the nanovoid-induced roughness features. The current study provides fundamental insights into the critical role of surface roughness in membrane fouling, which may have important implications for the future development of high-performance antifouling membranes.


Persistent Identifierhttp://hdl.handle.net/10722/331253
ISSN
2023 Impact Factor: 10.8
2023 SCImago Journal Rankings: 3.516
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorGan, QM-
dc.contributor.authorWu, CY-
dc.contributor.authorLong, L-
dc.contributor.authorPeng, LE-
dc.contributor.authorYang, Z-
dc.contributor.authorGuo, H-
dc.contributor.authorTang, CYY-
dc.date.accessioned2023-09-21T06:54:05Z-
dc.date.available2023-09-21T06:54:05Z-
dc.date.issued2023-01-31-
dc.identifier.citationEnvironmental Science and Technology, 2023, v. 57, n. 6, p. 2548-2556-
dc.identifier.issn0013-936X-
dc.identifier.urihttp://hdl.handle.net/10722/331253-
dc.description.abstract<p>Surface roughness has crucial influence on the fouling propensity of thin film composite (TFC) polyamide reverse osmosis (RO) membranes. A common wisdom is that rougher membranes tend to experience more severe fouling. In this study, we compared the fouling behaviors of a smooth polyamide membrane (RO-s) and a nanovoid-containing rough polyamide membrane (RO-r). Contrary to the traditional belief, we observed more severe fouling for RO-s, which can be ascribed to its uneven flux distribution caused by the "funnel effect". Additional tracer filtration tests using gold nanoparticles revealed a more patchlike particle deposition pattern, confirming the adverse impact of "funnel effect" on membrane water transport. In contrast, the experimentally observed lower fouling propensity of the nanovoid-containing rough membrane can be explained by: (1) the weakened "funnel effect" thanks to the presence of nanovoids, which can regulate the water transport pathway through the membrane and (2) the decreased average localized flux over the membrane surface due to the increased effective filtration area for the nanovoid-induced roughness features. The current study provides fundamental insights into the critical role of surface roughness in membrane fouling, which may have important implications for the future development of high-performance antifouling membranes.</p>-
dc.languageeng-
dc.publisherAmerican Chemical Society-
dc.relation.ispartofEnvironmental Science and Technology-
dc.subjectfunnel effect-
dc.subjectmembrane fouling-
dc.subjectnanovoid-containing roughness structure-
dc.subjectpolyamide reverse osmosis (RO) membranes-
dc.subjectsurface roughness-
dc.titleDoes Surface Roughness Necessarily Increase the Fouling Propensity of Polyamide Reverse Osmosis Membranes by Humic Acid?-
dc.typeArticle-
dc.identifier.doi10.1021/acs.est.2c07872-
dc.identifier.pmid36719958-
dc.identifier.scopuseid_2-s2.0-85147204297-
dc.identifier.volume57-
dc.identifier.issue6-
dc.identifier.spage2548-
dc.identifier.epage2556-
dc.identifier.eissn1520-5851-
dc.identifier.isiWOS:000925979400001-
dc.publisher.placeWASHINGTON-
dc.identifier.issnl0013-936X-

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