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Article: Synthesis and characterization of novel forward osmosis membranes based on layer-by-layer assembly

TitleSynthesis and characterization of novel forward osmosis membranes based on layer-by-layer assembly
Authors
Issue Date2011
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/est
Citation
Environmental Science And Technology, 2011, v. 45 n. 12, p. 5201-5208 How to Cite?
AbstractForward osmosis (FO) has received considerable interest for water- and energy-related applications in recent years. FO does not require an applied pressure and is believed to have a low fouling tendency. However, a major challenge in FO is the lack of high performance FO membranes. In the current work, novel nanofiltration (NF)-like FO membranes with good magnesium chloride retention were synthesized using layer-by-layer (LbL) assembly. The membrane substrate was tailored (high porosity, finger-like pores, thin cross-section, and high hydrophilicity) to achieve a small structural parameter of 0.5 mm. Increasing the number of polyelectrolyte layers improved the selectivity of the LbL membranes while reducing their water permeability. The more selective membrane 6#LbL (with 6 polyelectrolyte layers) had much lower reverse solute transport compared to 3#LbL and 1#LbL. Meanwhile, the FO water flux was found to be strongly affected by both membrane water permeability and solute reverse transport. Severe solute reverse transport was observed for the active-layer-facing-draw-solution membrane orientation, likely due to the suppression of Donnan exclusion as a result of the high ionic strength of the draw solution. In contrast, the active-layer-facing-feed-solution orientation showed remarkable FO performance (15, 20, and 28 L/m 2.h at 0.1, 0.5, and 1.0 M MgCl 2, respectively, for membrane 3#LbL using distilled water as feed solution), superior to other NF-like FO membranes reported in the literature. To the best of the knowledge of the authors, this is the first work on the synthesis and characterization of LbL based FO membranes. © 2011 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/185402
ISSN
2015 Impact Factor: 5.393
2015 SCImago Journal Rankings: 2.664
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorSaren, Qen_US
dc.contributor.authorQiu, CQen_US
dc.contributor.authorTang, CYen_US
dc.date.accessioned2013-07-30T07:32:18Z-
dc.date.available2013-07-30T07:32:18Z-
dc.date.issued2011en_US
dc.identifier.citationEnvironmental Science And Technology, 2011, v. 45 n. 12, p. 5201-5208en_US
dc.identifier.issn0013-936Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/185402-
dc.description.abstractForward osmosis (FO) has received considerable interest for water- and energy-related applications in recent years. FO does not require an applied pressure and is believed to have a low fouling tendency. However, a major challenge in FO is the lack of high performance FO membranes. In the current work, novel nanofiltration (NF)-like FO membranes with good magnesium chloride retention were synthesized using layer-by-layer (LbL) assembly. The membrane substrate was tailored (high porosity, finger-like pores, thin cross-section, and high hydrophilicity) to achieve a small structural parameter of 0.5 mm. Increasing the number of polyelectrolyte layers improved the selectivity of the LbL membranes while reducing their water permeability. The more selective membrane 6#LbL (with 6 polyelectrolyte layers) had much lower reverse solute transport compared to 3#LbL and 1#LbL. Meanwhile, the FO water flux was found to be strongly affected by both membrane water permeability and solute reverse transport. Severe solute reverse transport was observed for the active-layer-facing-draw-solution membrane orientation, likely due to the suppression of Donnan exclusion as a result of the high ionic strength of the draw solution. In contrast, the active-layer-facing-feed-solution orientation showed remarkable FO performance (15, 20, and 28 L/m 2.h at 0.1, 0.5, and 1.0 M MgCl 2, respectively, for membrane 3#LbL using distilled water as feed solution), superior to other NF-like FO membranes reported in the literature. To the best of the knowledge of the authors, this is the first work on the synthesis and characterization of LbL based FO membranes. © 2011 American Chemical Society.en_US
dc.languageengen_US
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/esten_US
dc.relation.ispartofEnvironmental Science and Technologyen_US
dc.subject.meshAcrylic Resins - Chemistryen_US
dc.subject.meshElectrolytes - Chemistryen_US
dc.subject.meshFiltrationen_US
dc.subject.meshMembranes, Artificialen_US
dc.subject.meshMicroscopy, Electron, Scanningen_US
dc.subject.meshNanostructures - Chemistryen_US
dc.subject.meshOsmosisen_US
dc.subject.meshPolyamines - Chemistryen_US
dc.subject.meshPolystyrenes - Chemistryen_US
dc.subject.meshSalts - Chemistryen_US
dc.subject.meshWater Purification - Methodsen_US
dc.titleSynthesis and characterization of novel forward osmosis membranes based on layer-by-layer assemblyen_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.doi10.1021/es200115wen_US
dc.identifier.pmid21591607-
dc.identifier.scopuseid_2-s2.0-79959283684en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79959283684&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume45en_US
dc.identifier.issue12en_US
dc.identifier.spage5201en_US
dc.identifier.epage5208en_US
dc.identifier.isiWOS:000291422200022-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridSaren, Q=54399230600en_US
dc.identifier.scopusauthoridQiu, CQ=36019493600en_US
dc.identifier.scopusauthoridTang, CY=35489259800en_US

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