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Article: Effect of solution chemistry on the adsorption of perfluorooctane sulfonate onto mineral surfaces

TitleEffect of solution chemistry on the adsorption of perfluorooctane sulfonate onto mineral surfaces
Authors
Issue Date2010
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/watres
Citation
Water Research, 2010, v. 44 n. 8, p. 2654-2662 How to Cite?
AbstractPerfluorooctane sulfonate (PFOS) is an emergent contaminant of substantial environmental concerns, yet very limited information has been available on PFOS adsorption onto mineral surfaces. PFOS adsorption onto goethite and silica was investigated by batch adsorption experiments under various solution compositions. Adsorption onto silica was only marginally affected by pH, ionic strength, and calcium concentration, likely due to the dominance of non-electrostatic interactions. In contrast, PFOS uptake by goethite increased significantly at high [H+] and [Ca2+], which was likely due to enhanced electrostatic attraction between the negatively charged PFOS molecules and positively charged goethite surface. The effect of pH was less significant at high ionic strength, likely due to electrical double layer compression. PFOS uptake was reduced at higher ionic strength for a strongly positively charged goethite surface (pH 3), while it increased for a weakly charged surface (pH 7 and 9), which could be attributed to the competition between PFOS-surface electrostatic attraction and PFOS-PFOS electrostatic repulsion. A conceptual model that captures PFOS-surface and PFOS-PFOS electrostatic interactions as well as non-electrostatic interaction was also formulated to understand the effect of solution chemistry on PFOS adsorption onto goethite and silica surfaces. © 2010 Elsevier Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/185389
ISSN
2015 Impact Factor: 5.991
2015 SCImago Journal Rankings: 2.772
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorTang, CYen_US
dc.contributor.authorShiang Fu, Qen_US
dc.contributor.authorGao, Den_US
dc.contributor.authorCriddle, CSen_US
dc.contributor.authorLeckie, JOen_US
dc.date.accessioned2013-07-30T07:32:08Z-
dc.date.available2013-07-30T07:32:08Z-
dc.date.issued2010en_US
dc.identifier.citationWater Research, 2010, v. 44 n. 8, p. 2654-2662en_US
dc.identifier.issn0043-1354en_US
dc.identifier.urihttp://hdl.handle.net/10722/185389-
dc.description.abstractPerfluorooctane sulfonate (PFOS) is an emergent contaminant of substantial environmental concerns, yet very limited information has been available on PFOS adsorption onto mineral surfaces. PFOS adsorption onto goethite and silica was investigated by batch adsorption experiments under various solution compositions. Adsorption onto silica was only marginally affected by pH, ionic strength, and calcium concentration, likely due to the dominance of non-electrostatic interactions. In contrast, PFOS uptake by goethite increased significantly at high [H+] and [Ca2+], which was likely due to enhanced electrostatic attraction between the negatively charged PFOS molecules and positively charged goethite surface. The effect of pH was less significant at high ionic strength, likely due to electrical double layer compression. PFOS uptake was reduced at higher ionic strength for a strongly positively charged goethite surface (pH 3), while it increased for a weakly charged surface (pH 7 and 9), which could be attributed to the competition between PFOS-surface electrostatic attraction and PFOS-PFOS electrostatic repulsion. A conceptual model that captures PFOS-surface and PFOS-PFOS electrostatic interactions as well as non-electrostatic interaction was also formulated to understand the effect of solution chemistry on PFOS adsorption onto goethite and silica surfaces. © 2010 Elsevier Ltd.en_US
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/watresen_US
dc.relation.ispartofWater Researchen_US
dc.subject.meshAdsorptionen_US
dc.subject.meshAlkanesulfonic Acids - Chemistryen_US
dc.subject.meshEnvironmental Pollutants - Chemistryen_US
dc.subject.meshEnvironmental Pollution - Prevention & Controlen_US
dc.subject.meshFluorocarbons - Chemistryen_US
dc.subject.meshIron Compounds - Chemistryen_US
dc.subject.meshMineralsen_US
dc.subject.meshSilicon Dioxide - Chemistryen_US
dc.titleEffect of solution chemistry on the adsorption of perfluorooctane sulfonate onto mineral surfacesen_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.watres.2010.01.038en_US
dc.identifier.pmid20172580en_US
dc.identifier.scopuseid_2-s2.0-77950918744en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-77950918744&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume44en_US
dc.identifier.issue8en_US
dc.identifier.spage2654en_US
dc.identifier.epage2662en_US
dc.identifier.isiWOS:000277556300026-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridTang, CY=35489259800en_US
dc.identifier.scopusauthoridShiang Fu, Q=8117816400en_US
dc.identifier.scopusauthoridGao, D=7202964911en_US
dc.identifier.scopusauthoridCriddle, CS=7004173112en_US
dc.identifier.scopusauthoridLeckie, JO=7006717360en_US

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