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dc.contributor.authorNg, Daniel Yee Fanen_US
dc.contributor.authorChen, Yunfengen_US
dc.contributor.authorDong, Zhilien_US
dc.contributor.authorWang, Rongen_US
dc.identifier.citationNg, D. Y. F., Chen, Y., Dong, Z. & Wang, R. (2019). Membrane compaction in forward osmosis process. Desalination, 468, 114067-.
dc.description.abstractMembrane compaction is commonly observed in polymeric membranes when subjected to elevated hydraulic pressure, but was rarely discussed in forward osmosis (FO) processes, since there was usually little hydraulic pressure difference across the membrane. In the current study, three TFC membranes were fabricated using hollow fiber substrates with varied water permeability to study the effect of the osmotic pressure on the TFC membranes. The TFC membranes were continuously tested in FO experiments for 24 h by using DI water as feed and NaCl solutions of different concentrations as draw solution, and their performances were checked again using fresh feed solutions. At the end of FO experiments, all TFC membranes experienced water flux and salt flux decline to different extents. The TFC membranes were characterized using SEM, TEM and AFM. Visible changes in the cross-section morphology and surface topography of the TFC membranes were observed after FO experiments. The observation suggested that the occurrence of membrane compaction could be associated with “negative pressure” build-up within the support layer of the TFC membranes. The current study could shed light on the important factors that should be considered during membrane fabrication and when establishing the testing protocols for the characterization of FO membrane.en_US
dc.description.sponsorshipEconomic Development Board (EDB)en_US
dc.description.sponsorshipNational Research Foundation (NRF)en_US
dc.description.sponsorshipPublic Utilities Board (PUB)en_US
dc.rights© 2019 Elsevier B.V. All rights reserved. This paper was published in Desalination and is made available with permission of Elsevier B.V.en_US
dc.subjectEngineering::Environmental engineeringen_US
dc.titleMembrane compaction in forward osmosis processen_US
dc.typeJournal Articleen
dc.contributor.schoolInterdisciplinary Graduate School (IGS)en_US
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.contributor.schoolSchool of Civil and Environmental Engineeringen_US
dc.contributor.researchNanyang Environment and Water Research Instituteen_US
dc.contributor.researchSingapore Membrane Technology Centreen_US
dc.description.versionAccepted versionen_US
dc.subject.keywordsForward Osmosis (FO) Processen_US
dc.subject.keywordsMembrane Compactionen_US
dc.description.acknowledgementThis research grant was supported by the Singapore National Research Foundation under its Urban Solution & Sustainability and administrated by PUB, Singapore's National Water Agency (USS-IF2018-1). The authors acknowledge Economic Development Board (EDB) of Singapore for funding the Singapore Membrane Technology Centre (SMTC), Nanyang Technological University.en_US
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