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Article: Membrane independent limiting flux for RO and NF membranes fouled by humic acid

TitleMembrane independent limiting flux for RO and NF membranes fouled by humic acid
Authors
Issue Date2007
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/est
Citation
Environmental Science And Technology, 2007, v. 41 n. 13, p. 4767-4773 How to Cite?
AbstractThe flux decline of reverse osmosis and nanofiltration membranes was investigated under constant pressure conditions during humic acid fouling tests. For a given membrane type under a given feedwater composition, increasing pressure resulted in increased flux reduction and foulant accumulation. A limiting flux seems to exist beyond which the membrane flux cannot be sustained. Membranes with initial fluxes greater than the limiting flux experienced severe fouling and their pseudo stable fluxes approached the limiting flux. Flux reduction was much milder when the initial flux was lower than the limiting flux. Furthermore, the limiting flux seems to be independent of membrane properties, probably due to the dominance of foulant-deposited-foulant interaction upon complete foulant coverage over membrane surfaces. On the other hand, strong dependence of the limiting flux on the feedwater composition was observed. The limiting flux was reduced at higher proton, calcium, and/or background electrolytes concentrations, likely due to reduced electrostatic repulsion under these conditions. © 2007 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/185378
ISSN
2015 Impact Factor: 5.393
2015 SCImago Journal Rankings: 2.664
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorTang, CYen_US
dc.contributor.authorLeckie, JOen_US
dc.date.accessioned2013-07-30T07:32:03Z-
dc.date.available2013-07-30T07:32:03Z-
dc.date.issued2007en_US
dc.identifier.citationEnvironmental Science And Technology, 2007, v. 41 n. 13, p. 4767-4773en_US
dc.identifier.issn0013-936Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/185378-
dc.description.abstractThe flux decline of reverse osmosis and nanofiltration membranes was investigated under constant pressure conditions during humic acid fouling tests. For a given membrane type under a given feedwater composition, increasing pressure resulted in increased flux reduction and foulant accumulation. A limiting flux seems to exist beyond which the membrane flux cannot be sustained. Membranes with initial fluxes greater than the limiting flux experienced severe fouling and their pseudo stable fluxes approached the limiting flux. Flux reduction was much milder when the initial flux was lower than the limiting flux. Furthermore, the limiting flux seems to be independent of membrane properties, probably due to the dominance of foulant-deposited-foulant interaction upon complete foulant coverage over membrane surfaces. On the other hand, strong dependence of the limiting flux on the feedwater composition was observed. The limiting flux was reduced at higher proton, calcium, and/or background electrolytes concentrations, likely due to reduced electrostatic repulsion under these conditions. © 2007 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.meshHumic Substancesen_US
dc.subject.meshMembranes, Artificialen_US
dc.subject.meshOsmosisen_US
dc.titleMembrane independent limiting flux for RO and NF membranes fouled by humic aciden_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/es063105wen_US
dc.identifier.pmid17695927-
dc.identifier.scopuseid_2-s2.0-34447256086en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-34447256086&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume41en_US
dc.identifier.issue13en_US
dc.identifier.spage4767en_US
dc.identifier.epage4773en_US
dc.identifier.isiWOS:000247782500051-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridTang, CY=35489259800en_US
dc.identifier.scopusauthoridLeckie, JO=7006717360en_US

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