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Article: The role of foulant-foulant electrostatic interaction on limiting flux for RO and NF membranes during humic acid fouling-Theoretical basis, experimental evidence, and AFM interaction force measurement

TitleThe role of foulant-foulant electrostatic interaction on limiting flux for RO and NF membranes during humic acid fouling-Theoretical basis, experimental evidence, and AFM interaction force measurement
Authors
KeywordsCritical Flux
Limiting Flux
Membrane Fouling
Nanofiltration (Nf)
Natural Organic Matter
Reverse Osmosis (Ro)
Issue Date2009
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memsci
Citation
Journal Of Membrane Science, 2009, v. 326 n. 2, p. 526-532 How to Cite?
AbstractA limiting flux model has been recently developed for predicting the fouling behavior of reverse osmosis and nanofiltration membranes by organic macromolecules [C.Y. Tang, J.O. Leckie, Membrane independent limiting flux for RO and NF membranes fouled by humic acid, Environmental Science and Technology 41 (2007) 4767-4773]. Several interesting results have been observed: (a) there was a maximum pseudo-stable flux (the limiting flux) beyond which further increase in applied pressure did not translate to a greater stable flux; (b) all membrane samples attained the limiting flux under constant pressure conditions as long as their initial flux was greater than the limiting flux; (c) the limiting flux did not depend on the properties of membranes; (d) the limiting flux had strong dependence on the feedwater composition, such as pH, ionic strength, and divalent ion concentration. The current study investigates the dependence of limiting flux on intermolecular interaction between foulant molecules. It was observed that the limiting flux was directly proportional to the intermolecular electrostatic repulsive force and that conditions enhancing foulant-deposited-foulant repulsion resulted in greater limiting flux values. Such observations agree well with a theoretical model capturing both hydrodynamic and DLVO interactions. Interaction force measurements by atomic force microscopy (AFM) were also performed. The limiting flux correlated reasonably well with AFM interaction force between the model foulant and the fouled membrane surface. © 2008 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/185381
ISSN
2015 Impact Factor: 5.557
2015 SCImago Journal Rankings: 2.042
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorTang, CYen_US
dc.contributor.authorKwon, YNen_US
dc.contributor.authorLeckie, JOen_US
dc.date.accessioned2013-07-30T07:32:04Z-
dc.date.available2013-07-30T07:32:04Z-
dc.date.issued2009en_US
dc.identifier.citationJournal Of Membrane Science, 2009, v. 326 n. 2, p. 526-532en_US
dc.identifier.issn0376-7388en_US
dc.identifier.urihttp://hdl.handle.net/10722/185381-
dc.description.abstractA limiting flux model has been recently developed for predicting the fouling behavior of reverse osmosis and nanofiltration membranes by organic macromolecules [C.Y. Tang, J.O. Leckie, Membrane independent limiting flux for RO and NF membranes fouled by humic acid, Environmental Science and Technology 41 (2007) 4767-4773]. Several interesting results have been observed: (a) there was a maximum pseudo-stable flux (the limiting flux) beyond which further increase in applied pressure did not translate to a greater stable flux; (b) all membrane samples attained the limiting flux under constant pressure conditions as long as their initial flux was greater than the limiting flux; (c) the limiting flux did not depend on the properties of membranes; (d) the limiting flux had strong dependence on the feedwater composition, such as pH, ionic strength, and divalent ion concentration. The current study investigates the dependence of limiting flux on intermolecular interaction between foulant molecules. It was observed that the limiting flux was directly proportional to the intermolecular electrostatic repulsive force and that conditions enhancing foulant-deposited-foulant repulsion resulted in greater limiting flux values. Such observations agree well with a theoretical model capturing both hydrodynamic and DLVO interactions. Interaction force measurements by atomic force microscopy (AFM) were also performed. The limiting flux correlated reasonably well with AFM interaction force between the model foulant and the fouled membrane surface. © 2008 Elsevier B.V. All rights reserved.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.subjectCritical Fluxen_US
dc.subjectLimiting Fluxen_US
dc.subjectMembrane Foulingen_US
dc.subjectNanofiltration (Nf)en_US
dc.subjectNatural Organic Matteren_US
dc.subjectReverse Osmosis (Ro)en_US
dc.titleThe role of foulant-foulant electrostatic interaction on limiting flux for RO and NF membranes during humic acid fouling-Theoretical basis, experimental evidence, and AFM interaction force measurementen_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.2008.10.043en_US
dc.identifier.scopuseid_2-s2.0-58149200926en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-58149200926&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume326en_US
dc.identifier.issue2en_US
dc.identifier.spage526en_US
dc.identifier.epage532en_US
dc.identifier.isiWOS:000263006500033-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridTang, CY=35489259800en_US
dc.identifier.scopusauthoridKwon, YN=51764040900en_US
dc.identifier.scopusauthoridLeckie, JO=7006717360en_US

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