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Article: Nanofiltration membrane fouling by oppositely charged macromolecules: Investigation on flux behavior, foulant mass deposition, and solute rejection

TitleNanofiltration membrane fouling by oppositely charged macromolecules: Investigation on flux behavior, foulant mass deposition, and solute rejection
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. 20, p. 8941-8947 How to Cite?
AbstractNanofiltration membrane fouling by oppositely charged polysaccharide (alginate) and protein (lysozyme) was systematically studied. It was found that membrane flux decline in the presence of both lysozyme and alginate was much more severe compared to that when there was only lysozyme or alginate in the feed solution. The flux performance for the mixed foulants was only weakly affected by solution pH and calcium concentration. These effects were likely due to the strong electrostatic attraction between the two oppositely charged foulants. Higher initial flux caused increased foulant deposition, more compact foulant layer, and more severe flux decline. The deposited foulant cake layer had a strong tendency to maintain a constant foulant composition that was independent of the membrane initial flux and only weakly dependent on the relative foulant concentration in feed solution. In contrast, solution chemistry (pH and [Ca 2+]) had marked effect on the foulant layer composition, likely due to the resulting changes in the foulant-foulant interaction. The mixed alginate-lysozyme fouling could result in an initial enhancement in salt rejection. However, such initial enhancement was not observed when there was 1 mM calcium present in the feedwater, which may be attributed to the charge neutralization of the foulant layer. © 2011 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/185410
ISSN
2015 Impact Factor: 5.393
2015 SCImago Journal Rankings: 2.664
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWang, YNen_US
dc.contributor.authorTang, CYen_US
dc.date.accessioned2013-07-30T07:32:20Z-
dc.date.available2013-07-30T07:32:20Z-
dc.date.issued2011en_US
dc.identifier.citationEnvironmental Science And Technology, 2011, v. 45 n. 20, p. 8941-8947en_US
dc.identifier.issn0013-936Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/185410-
dc.description.abstractNanofiltration membrane fouling by oppositely charged polysaccharide (alginate) and protein (lysozyme) was systematically studied. It was found that membrane flux decline in the presence of both lysozyme and alginate was much more severe compared to that when there was only lysozyme or alginate in the feed solution. The flux performance for the mixed foulants was only weakly affected by solution pH and calcium concentration. These effects were likely due to the strong electrostatic attraction between the two oppositely charged foulants. Higher initial flux caused increased foulant deposition, more compact foulant layer, and more severe flux decline. The deposited foulant cake layer had a strong tendency to maintain a constant foulant composition that was independent of the membrane initial flux and only weakly dependent on the relative foulant concentration in feed solution. In contrast, solution chemistry (pH and [Ca 2+]) had marked effect on the foulant layer composition, likely due to the resulting changes in the foulant-foulant interaction. The mixed alginate-lysozyme fouling could result in an initial enhancement in salt rejection. However, such initial enhancement was not observed when there was 1 mM calcium present in the feedwater, which may be attributed to the charge neutralization of the foulant layer. © 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.meshHydrogen-Ion Concentrationen_US
dc.subject.meshMembranes, Artificialen_US
dc.subject.meshUltrafiltration - Methodsen_US
dc.subject.meshWater Purification - Methodsen_US
dc.titleNanofiltration membrane fouling by oppositely charged macromolecules: Investigation on flux behavior, foulant mass deposition, and solute rejectionen_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/es202709ren_US
dc.identifier.pmid21928796-
dc.identifier.scopuseid_2-s2.0-80054688300en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80054688300&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume45en_US
dc.identifier.issue20en_US
dc.identifier.spage8941en_US
dc.identifier.epage8947en_US
dc.identifier.isiWOS:000295704500047-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridWang, YN=35076853300en_US
dc.identifier.scopusauthoridTang, CY=35489259800en_US

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