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Article: An XPS study for mechanisms of arsenate adsorption onto a magnetite-doped activated carbon fiber

TitleAn XPS study for mechanisms of arsenate adsorption onto a magnetite-doped activated carbon fiber
Authors
KeywordsActivated carbon fiber (ACF)
Adsorption
Arsenate
Magnetite
X-ray photoelectron spectroscopy (XPS)
Issue Date2010
PublisherAcademic Press. The Journal's web site is located at http://www.elsevier.com/locate/jcis
Citation
Journal Of Colloid And Interface Science, 2010, v. 343 n. 1, p. 232-238 How to Cite?
Abstract
The surface and bulk structures of a newly developed carbon-based iron-containing adsorbent for As(V) adsorption were investigated by using X-ray diffraction (XRD), field emission scanning electronic microscopy (FESEM), and X-ray photoelectron spectroscopy (XPS). XRD patterns of the adsorbents indicated that the modified activated carbon fiber (MACF) was a simple mixture of the raw activated carbon fiber (RACF) and magnetite. After modification, a porous film was formed on the surface of the MACF with nano-sized magnetite on it. The As(V) uptake on the MACF was highly pH dependent and was facilitated in acidic solutions. XPS studies demonstrated that the surface oxygen-containing functional groups were involved in the adsorption and that magnetite played a key role in As(V) uptake. The dominance of HAsO4 2 - in surface complexes and the pH effect on As(V) uptake demonstrated that the monoprotonated bidentate complexes were dominant on the surface of the MACF. No reduction of As(V) was observed on the surface of the ACFs. © 2009 Elsevier Inc. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/129135
ISSN
2013 Impact Factor: 3.552
ISI Accession Number ID
Funding AgencyGrant Number
Agency for Science Technology and Research of Singapore0921010059
National University of SingaporeR-288-000-023-112
Hong Kong SAR Government of ChinaHKU7149/E06
HKU7144/E07
National Natural Science Foundation of China50728806
Funding Information:

The financial Support provided to J.P. Chen and S.J. Zhang by Agency for Science Technology and Research of Singapore (SERC Grant No. 0921010059) and the National University of Singapore (R-288-000-023-112) is appreciated. This research was also partially supported by the Research Grants Council of the Hong Kong SAR Government of China under Grants HKU7149/E06 and HKU7144/E07 and the National Natural Science Foundation of China under Grant 50728806.

References

 

DC FieldValueLanguage
dc.contributor.authorZhang, Sen_HK
dc.contributor.authorLi, Xyen_HK
dc.contributor.authorChen, JPen_HK
dc.date.accessioned2010-12-23T08:32:53Z-
dc.date.available2010-12-23T08:32:53Z-
dc.date.issued2010en_HK
dc.identifier.citationJournal Of Colloid And Interface Science, 2010, v. 343 n. 1, p. 232-238en_HK
dc.identifier.issn0021-9797en_HK
dc.identifier.urihttp://hdl.handle.net/10722/129135-
dc.description.abstractThe surface and bulk structures of a newly developed carbon-based iron-containing adsorbent for As(V) adsorption were investigated by using X-ray diffraction (XRD), field emission scanning electronic microscopy (FESEM), and X-ray photoelectron spectroscopy (XPS). XRD patterns of the adsorbents indicated that the modified activated carbon fiber (MACF) was a simple mixture of the raw activated carbon fiber (RACF) and magnetite. After modification, a porous film was formed on the surface of the MACF with nano-sized magnetite on it. The As(V) uptake on the MACF was highly pH dependent and was facilitated in acidic solutions. XPS studies demonstrated that the surface oxygen-containing functional groups were involved in the adsorption and that magnetite played a key role in As(V) uptake. The dominance of HAsO4 2 - in surface complexes and the pH effect on As(V) uptake demonstrated that the monoprotonated bidentate complexes were dominant on the surface of the MACF. No reduction of As(V) was observed on the surface of the ACFs. © 2009 Elsevier Inc. All rights reserved.en_HK
dc.languageengen_US
dc.publisherAcademic Press. The Journal's web site is located at http://www.elsevier.com/locate/jcisen_HK
dc.relation.ispartofJournal of Colloid and Interface Scienceen_HK
dc.subjectActivated carbon fiber (ACF)en_HK
dc.subjectAdsorptionen_HK
dc.subjectArsenateen_HK
dc.subjectMagnetiteen_HK
dc.subjectX-ray photoelectron spectroscopy (XPS)en_HK
dc.titleAn XPS study for mechanisms of arsenate adsorption onto a magnetite-doped activated carbon fiberen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0021-9797&volume=343&issue=1&spage=232&epage=238&date=2010&atitle=An+XPS+study+for+mechanisms+of+arsenate+adsorption+onto+a+magnetite-doped+activated+carbon+fiber-
dc.identifier.emailLi, Xy:xlia@hkucc.hku.hken_HK
dc.identifier.authorityLi, Xy=rp00222en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jcis.2009.11.001en_HK
dc.identifier.pmid20018292-
dc.identifier.scopuseid_2-s2.0-74449084764en_HK
dc.identifier.hkuros178452en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-74449084764&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume343en_HK
dc.identifier.issue1en_HK
dc.identifier.spage232en_HK
dc.identifier.epage238en_HK
dc.identifier.isiWOS:000274548900033-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridZhang, S=35867631900en_HK
dc.identifier.scopusauthoridLi, Xy=26642887900en_HK
dc.identifier.scopusauthoridChen, JP=25649179800en_HK
dc.identifier.citeulike6190508-

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