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Article: Characterization of humic acid fouled reverse osmosis and nanofiltration membranes by transmission electron microscopy and streaming potential measurements

TitleCharacterization of humic acid fouled reverse osmosis and nanofiltration membranes by transmission electron microscopy and streaming potential measurements
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. 3, p. 942-949 How to Cite?
AbstractReverse osmosis and nanofiltration membranes fouled by humic acid were systematically characterized by transmission electron microscopy. All fouled membranes, except those with very low initial flux, were completely covered by a layer of humic acid whose thickness and density were greatly affected by the feedwater composition ([H +] and [Ca 2+]) and initial flux. A low-density humic layer (about 0.1 g of purified Aldrich humic acid (PAHA)/cm 3) was formed at low initial flux (2 m/day or less) at pH 7 without calcium. It was several times denser at a higher initial flux, pH 4.5, or 1 mM Ca 2+. Corresponding to the denser foulant layers under these conditions, PAHA accumulation was greatly increased. The denser foulant layers together with the greater PAHA accumulations were responsible for the severe flux reductions. Both virgin and fouled membranes were characterized by streaming potential measurements. While considerable differences existed for virgin membranes, humic acid fouled membranes exhibited identical surface charge properties. The ζ potential of the fouled membranes was controlled by the humic acid layer due to its complete coverage of the membrane surfaces. © 2007 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/185376
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.authorKwon, YNen_US
dc.contributor.authorLeckie, JOen_US
dc.date.accessioned2013-07-30T07:32:02Z-
dc.date.available2013-07-30T07:32:02Z-
dc.date.issued2007en_US
dc.identifier.citationEnvironmental Science And Technology, 2007, v. 41 n. 3, p. 942-949en_US
dc.identifier.issn0013-936Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/185376-
dc.description.abstractReverse osmosis and nanofiltration membranes fouled by humic acid were systematically characterized by transmission electron microscopy. All fouled membranes, except those with very low initial flux, were completely covered by a layer of humic acid whose thickness and density were greatly affected by the feedwater composition ([H +] and [Ca 2+]) and initial flux. A low-density humic layer (about 0.1 g of purified Aldrich humic acid (PAHA)/cm 3) was formed at low initial flux (2 m/day or less) at pH 7 without calcium. It was several times denser at a higher initial flux, pH 4.5, or 1 mM Ca 2+. Corresponding to the denser foulant layers under these conditions, PAHA accumulation was greatly increased. The denser foulant layers together with the greater PAHA accumulations were responsible for the severe flux reductions. Both virgin and fouled membranes were characterized by streaming potential measurements. While considerable differences existed for virgin membranes, humic acid fouled membranes exhibited identical surface charge properties. The ζ potential of the fouled membranes was controlled by the humic acid layer due to its complete coverage of the membrane surfaces. © 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.meshCalcium - Chemistryen_US
dc.subject.meshCations, Divalenten_US
dc.subject.meshEquipment Failureen_US
dc.subject.meshHumic Substances - Analysisen_US
dc.subject.meshHydrogen-Ion Concentrationen_US
dc.subject.meshMembranes, Artificialen_US
dc.subject.meshMicroscopy, Electron, Transmission - Methodsen_US
dc.subject.meshOsmosisen_US
dc.subject.meshTime Factorsen_US
dc.subject.meshUltrafiltration - Methodsen_US
dc.subject.meshWaste Disposal, Fluid - Methodsen_US
dc.subject.meshWater Purification - Methodsen_US
dc.titleCharacterization of humic acid fouled reverse osmosis and nanofiltration membranes by transmission electron microscopy and streaming potential measurementsen_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/es061322ren_US
dc.identifier.pmid17328207-
dc.identifier.scopuseid_2-s2.0-33846828679en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33846828679&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume41en_US
dc.identifier.issue3en_US
dc.identifier.spage942en_US
dc.identifier.epage949en_US
dc.identifier.isiWOS:000244002800051-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridTang, CY=35489259800en_US
dc.identifier.scopusauthoridKwon, YN=14123466400en_US
dc.identifier.scopusauthoridLeckie, JO=7006717360en_US

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