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Article: Characterization of forward osmosis membranes by electrochemical impedance spectroscopy

TitleCharacterization of forward osmosis membranes by electrochemical impedance spectroscopy
Authors
KeywordsElectrochemical Impedance Spectroscopy
Forward Osmosis
Internal Concentration Polarization
Issue Date2013
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/desal
Citation
Desalination, 2013, v. 312, p. 45-51 How to Cite?
AbstractForward osmosis (FO) has a potential role in desalination and water reclamation. However, the efficiency of FO processes is significantly limited by internal concentration polarization (ICP), which is difficult to detect by conventional characterization methods. In this work, we aimed to apply electrochemical impedance spectroscopy (EIS) to FO systems, and to develop a methodology for interpreting the interplay between the membrane structure and the polarization phenomena. Three commercial FO membranes with different substrate structures were characterized by an EIS system that was modified to accommodate FO processes, and the impedance spectra were analyzed based on their equivalent circuits. In the static tests (without osmosis), the limit behaviors of the impedance spectra were exploited to resolve the structural information of the FO membranes from the electrolyte background, which was in turn compared with the characterization results via scanning electron microscope (SEM). Associated with the different membrane orientations, the dynamic tests (with osmosis) were implemented to verify the ability of the EIS system to detect the variation of the developed concentration profiles within the membrane structure. The characterization results indicate that EIS is promising to be a handy tool to investigate the polarization phenomena during the FO processes. © 2012 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/185441
ISSN
2015 Impact Factor: 4.412
2015 SCImago Journal Rankings: 1.549
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorGao, Yen_US
dc.contributor.authorLi, Wen_US
dc.contributor.authorLay, WCLen_US
dc.contributor.authorCoster, HGLen_US
dc.contributor.authorFane, AGen_US
dc.contributor.authorTang, CYen_US
dc.date.accessioned2013-07-30T07:32:35Z-
dc.date.available2013-07-30T07:32:35Z-
dc.date.issued2013en_US
dc.identifier.citationDesalination, 2013, v. 312, p. 45-51en_US
dc.identifier.issn0011-9164en_US
dc.identifier.urihttp://hdl.handle.net/10722/185441-
dc.description.abstractForward osmosis (FO) has a potential role in desalination and water reclamation. However, the efficiency of FO processes is significantly limited by internal concentration polarization (ICP), which is difficult to detect by conventional characterization methods. In this work, we aimed to apply electrochemical impedance spectroscopy (EIS) to FO systems, and to develop a methodology for interpreting the interplay between the membrane structure and the polarization phenomena. Three commercial FO membranes with different substrate structures were characterized by an EIS system that was modified to accommodate FO processes, and the impedance spectra were analyzed based on their equivalent circuits. In the static tests (without osmosis), the limit behaviors of the impedance spectra were exploited to resolve the structural information of the FO membranes from the electrolyte background, which was in turn compared with the characterization results via scanning electron microscope (SEM). Associated with the different membrane orientations, the dynamic tests (with osmosis) were implemented to verify the ability of the EIS system to detect the variation of the developed concentration profiles within the membrane structure. The characterization results indicate that EIS is promising to be a handy tool to investigate the polarization phenomena during the FO processes. © 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/desalen_US
dc.relation.ispartofDesalinationen_US
dc.subjectElectrochemical Impedance Spectroscopyen_US
dc.subjectForward Osmosisen_US
dc.subjectInternal Concentration Polarizationen_US
dc.titleCharacterization of forward osmosis membranes by electrochemical impedance spectroscopyen_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.desal.2012.03.006en_US
dc.identifier.scopuseid_2-s2.0-84873145824en_US
dc.identifier.hkuros231359-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84873145824&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume312en_US
dc.identifier.spage45en_US
dc.identifier.epage51en_US
dc.identifier.isiWOS:000315548300008-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridGao, Y=55143621800en_US
dc.identifier.scopusauthoridLi, W=55139697800en_US
dc.identifier.scopusauthoridLay, WCL=25225504600en_US
dc.identifier.scopusauthoridCoster, HGL=7003350375en_US
dc.identifier.scopusauthoridFane, AG=35593963600en_US
dc.identifier.scopusauthoridTang, CY=35489259800en_US

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