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dc.contributor.authorAkther, Nawshad
dc.contributor.authorAli, Syed Muztuza
dc.contributor.authorPhuntsho, Sherub
dc.contributor.authorShon, Hokyong
dc.date.accessioned2021-02-11T14:23:37Z
dc.date.available2021-02-11T14:23:37Z
dc.date.issued2020-10
dc.identifier.citationAkther, N., Ali, S. M., Phuntsho, S., & Shon, H. (2020). Surface modification of thin-film composite forward osmosis membranes with polyvinyl alcohol–graphene oxide composite hydrogels for antifouling properties. Desalination, 491, 114591. doi:10.1016/j.desal.2020.114591
dc.identifier.issn0011-9164
dc.identifier.doi10.1016/j.desal.2020.114591
dc.identifier.urihttp://hdl.handle.net/10754/667364
dc.description.abstractIn this study, the polyamide (PA) layers of commercial thin-film composite (TFC) forward osmosis (FO) membranes were coated with glutaraldehyde cross-linked polyvinyl alcohol (PVA) hydrogel comprising of graphene oxide (GO) at various loadings to enhance their fouling resistance. The optimal GO concentration of 0.02 wt% in hydrogel solution was confirmed from the FO membrane performance, and its influence on membrane antifouling properties was studied. The properties of the modified membranes, such as surface morphology, surface charge and wettability, were also investigated. PVA/GO coating was observed to increase the smoothness and hydrophilicity of the membrane surface. The foulant resistances of the pristine, PVA-coated and PVA/GO-coated membranes were also reported. PVA hydrogel-coated TFC membrane with a GO loading of 0.02 wt% showed a 55% reduction in specific reverse solute flux, only a marginal reduction in the water flux, and the best antifouling property with a 58% higher flux recovery than the pristine TFC membrane. The significant improvement in the selectivity of the modified membranes meant that the hydrogel coating could be used to seal PA defects. The biocidal GO flakes in PVA hydrogel coating also improved the biofouling resistance of the modified membranes, which could be attributed to their morphologies and superior surface properties.
dc.description.sponsorshipThe research reported in this paper was supported by the ARC Industrial Transformation Research Hub (IH170100009) and the King Abdullah University of Science and Technology (KAUST), Saudi Arabia through the Competitive Research Grant Program – CRG2017 (CRG6), Grant # URF/1/3404-01.
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S0011916420308602
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Desalination. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Desalination, [491, , (2020-10)] DOI: 10.1016/j.desal.2020.114591 . © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleSurface modification of thin-film composite forward osmosis membranes with polyvinyl alcohol–graphene oxide composite hydrogels for antifouling properties
dc.typeArticle
dc.identifier.journalDesalination
dc.rights.embargodate2022-06-13
dc.eprint.versionPost-print
dc.contributor.institutionSchool of Civil and Environmental Engineering, University of Technology Sydney (UTS), NSW 2007, Australia
dc.identifier.volume491
dc.identifier.pages114591
kaust.grant.numberCRG2017
kaust.grant.numberURF/1/3404-01
dc.identifier.eid2-s2.0-85086411179
kaust.acknowledged.supportUnitCompetitive Research


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