File Download
  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Degradation of polyamide nanofiltration membranes by bromine: changes of physiochemical properties and filtration performance

TitleDegradation of polyamide nanofiltration membranes by bromine: changes of physiochemical properties and filtration performance
Authors
Issue Date2021
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/esthag
Citation
Environmental Science & Technology, 2021, v. 55 n. 9, p. 6329-6339 How to Cite?
AbstractThe potential coexistence and interaction of bromine and polyamide membranes during membrane-based water treatment prompts us to investigate the effect of bromine on membrane performance. For fully aromatic polyamide membrane NF90 exposed under a mild bromination condition (10 mg/L), bromine incorporation resulted in more negatively charged (−13 vs −25 mV) and hydrophobic (55.2 vs 58.9°) surfaces and narrower pore channels (0.3 vs 0.29 nm). The permeabilities of water and neutral solutes were reduced by 64 and 69–87%, respectively, which was attributed to the decreased effective pore radius and hydrophilicity. NaCl permeability was reduced by 90% as a synergistic result of enhanced size exclusion and charge repulsion. The further exposure (100 and 500 mg/L bromine) resulted in a more hydrophobic surface (61.7 and 65.5°) and the minor further reduction for water and solute permeabilities (1–9%). Compared with chlorine, the different incorporation efficiency and properties (e.g., atomic size, hydrophilicity) of bromine resulted in opposite trends and/or different degrees for the variation of physicochemical properties and filtration performance of membranes. The bromine incorporation, the shift and disappearance of three characteristic bands, and the increased O/N ratio and calcium content indicated the degradation pathways of N-bromination and bromination-promoted hydrolysis under mild bromination conditions (480 mg/L·h). The further ring-bromination occurred after severe bromine exposure (4800–24,000 mg/L·h). The semi-aromatic polyamide membrane NF270 underwent a similar but less significant deteriorated filtration performance compared with NF90, which requires a different explanation.
Persistent Identifierhttp://hdl.handle.net/10722/305294
ISSN
2023 Impact Factor: 10.8
2023 SCImago Journal Rankings: 3.516
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZhao, H-
dc.contributor.authorYang, L-
dc.contributor.authorChen, X-
dc.contributor.authorSheng, M-
dc.contributor.authorCao, G-
dc.contributor.authorCai, L-
dc.contributor.authorMeng, S-
dc.contributor.authorTang, CY-
dc.date.accessioned2021-10-20T10:07:23Z-
dc.date.available2021-10-20T10:07:23Z-
dc.date.issued2021-
dc.identifier.citationEnvironmental Science & Technology, 2021, v. 55 n. 9, p. 6329-6339-
dc.identifier.issn0013-936X-
dc.identifier.urihttp://hdl.handle.net/10722/305294-
dc.description.abstractThe potential coexistence and interaction of bromine and polyamide membranes during membrane-based water treatment prompts us to investigate the effect of bromine on membrane performance. For fully aromatic polyamide membrane NF90 exposed under a mild bromination condition (10 mg/L), bromine incorporation resulted in more negatively charged (−13 vs −25 mV) and hydrophobic (55.2 vs 58.9°) surfaces and narrower pore channels (0.3 vs 0.29 nm). The permeabilities of water and neutral solutes were reduced by 64 and 69–87%, respectively, which was attributed to the decreased effective pore radius and hydrophilicity. NaCl permeability was reduced by 90% as a synergistic result of enhanced size exclusion and charge repulsion. The further exposure (100 and 500 mg/L bromine) resulted in a more hydrophobic surface (61.7 and 65.5°) and the minor further reduction for water and solute permeabilities (1–9%). Compared with chlorine, the different incorporation efficiency and properties (e.g., atomic size, hydrophilicity) of bromine resulted in opposite trends and/or different degrees for the variation of physicochemical properties and filtration performance of membranes. The bromine incorporation, the shift and disappearance of three characteristic bands, and the increased O/N ratio and calcium content indicated the degradation pathways of N-bromination and bromination-promoted hydrolysis under mild bromination conditions (480 mg/L·h). The further ring-bromination occurred after severe bromine exposure (4800–24,000 mg/L·h). The semi-aromatic polyamide membrane NF270 underwent a similar but less significant deteriorated filtration performance compared with NF90, which requires a different explanation.-
dc.languageeng-
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/esthag-
dc.relation.ispartofEnvironmental Science & Technology-
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in Environmental Science & Technology, 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.est.1c00206-
dc.titleDegradation of polyamide nanofiltration membranes by bromine: changes of physiochemical properties and filtration performance-
dc.typeArticle-
dc.identifier.emailTang, CY: tangc@hku.hk-
dc.identifier.authorityTang, CY=rp01765-
dc.description.naturepostprint-
dc.identifier.doi10.1021/acs.est.1c00206-
dc.identifier.pmid33848140-
dc.identifier.scopuseid_2-s2.0-85105061901-
dc.identifier.hkuros326745-
dc.identifier.volume55-
dc.identifier.issue9-
dc.identifier.spage6329-
dc.identifier.epage6339-
dc.identifier.isiWOS:000648515400071-
dc.publisher.placeUnited States-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats