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Article: Double-skinned forward osmosis membranes based on layer-by-layer assembly-FO performance and fouling behavior

TitleDouble-skinned forward osmosis membranes based on layer-by-layer assembly-FO performance and fouling behavior
Authors
KeywordsAnti-Fouling Performance
Double-Skinned Forward Osmosis (Fo)
Internal Concentration Polarization (Icp)
Layer-By-Layer (Lbl) Assembly
Polyelectrolyte Deposition
Issue Date2012
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memsci
Citation
Journal Of Membrane Science, 2012, v. 405-406, p. 20-29 How to Cite?
AbstractNovel crosslinked layer-by-layer (xLbL) forward osmosis (FO) membranes with a double-skinned design have been synthesized and characterized in the present work. Cross flow reverse osmosis test results showed that the membrane top skin generally had higher hydraulic resistance and better solute rejection compared to the bottom skin even when the same number of polyelectrolyte layers were deposited. The overall water permeability of the double-skinned FO membrane can be estimated from the respective values of the top and bottom skins using a resistance-in-series model. For FO tests performed at high feed solution (FS) concentration (0.5M MgCl 2), the water flux was not affected by the membrane separation properties nor its orientation. However, much higher FO water flux was obtained in the top-skin-facing-the-draw-solution (Top-DS) orientation compared to the alternative Top-FS orientation when the FS concentration was low. Using DI water as FS and 0.5M MgCl 2 as DS, FO water fluxes ranged from 40 to 80L/m 2h in Top-DS and ∼30L/m 2h in Top-FS. Higher DS concentrations resulted in greater FO water fluxes (e.g., 50-110L/m 2h at 2M MgCl 2 DS). Fouling tests demonstrated that the double-skinned membrane had much better resistance against FO fouling in the Top-DS orientation. To the best knowledge of the authors, this is the first systematic study on the synthesis and characterization of double-skinned xLbL membranes. In addition, their superior anti-fouling ability was experimentally demonstrated for the first time. © 2012 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/185421
ISSN
2015 Impact Factor: 5.557
2015 SCImago Journal Rankings: 2.042
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorQi, Sen_US
dc.contributor.authorQiu, CQen_US
dc.contributor.authorZhao, Yen_US
dc.contributor.authorTang, CYen_US
dc.date.accessioned2013-07-30T07:32:25Z-
dc.date.available2013-07-30T07:32:25Z-
dc.date.issued2012en_US
dc.identifier.citationJournal Of Membrane Science, 2012, v. 405-406, p. 20-29en_US
dc.identifier.issn0376-7388en_US
dc.identifier.urihttp://hdl.handle.net/10722/185421-
dc.description.abstractNovel crosslinked layer-by-layer (xLbL) forward osmosis (FO) membranes with a double-skinned design have been synthesized and characterized in the present work. Cross flow reverse osmosis test results showed that the membrane top skin generally had higher hydraulic resistance and better solute rejection compared to the bottom skin even when the same number of polyelectrolyte layers were deposited. The overall water permeability of the double-skinned FO membrane can be estimated from the respective values of the top and bottom skins using a resistance-in-series model. For FO tests performed at high feed solution (FS) concentration (0.5M MgCl 2), the water flux was not affected by the membrane separation properties nor its orientation. However, much higher FO water flux was obtained in the top-skin-facing-the-draw-solution (Top-DS) orientation compared to the alternative Top-FS orientation when the FS concentration was low. Using DI water as FS and 0.5M MgCl 2 as DS, FO water fluxes ranged from 40 to 80L/m 2h in Top-DS and ∼30L/m 2h in Top-FS. Higher DS concentrations resulted in greater FO water fluxes (e.g., 50-110L/m 2h at 2M MgCl 2 DS). Fouling tests demonstrated that the double-skinned membrane had much better resistance against FO fouling in the Top-DS orientation. To the best knowledge of the authors, this is the first systematic study on the synthesis and characterization of double-skinned xLbL membranes. In addition, their superior anti-fouling ability was experimentally demonstrated for the first time. © 2012 Elsevier B.V.en_US
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memscien_US
dc.relation.ispartofJournal of Membrane Scienceen_US
dc.subjectAnti-Fouling Performanceen_US
dc.subjectDouble-Skinned Forward Osmosis (Fo)en_US
dc.subjectInternal Concentration Polarization (Icp)en_US
dc.subjectLayer-By-Layer (Lbl) Assemblyen_US
dc.subjectPolyelectrolyte Depositionen_US
dc.titleDouble-skinned forward osmosis membranes based on layer-by-layer assembly-FO performance and fouling behavioren_US
dc.typeArticleen_US
dc.identifier.emailTang, CY: tangc@hku.hken_US
dc.identifier.authorityTang, CY=rp01765en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.memsci.2012.02.032en_US
dc.identifier.scopuseid_2-s2.0-84862777096en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84862777096&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume405-406en_US
dc.identifier.spage20en_US
dc.identifier.epage29en_US
dc.identifier.isiWOS:000302782000003-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridQi, S=48461816800en_US
dc.identifier.scopusauthoridQiu, CQ=36019493600en_US
dc.identifier.scopusauthoridZhao, Y=8579132600en_US
dc.identifier.scopusauthoridTang, CY=35489259800en_US

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