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Article: An XPS study for mechanisms of arsenate adsorption onto a magnetite-doped activated carbon fiber
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TitleAn XPS study for mechanisms of arsenate adsorption onto a magnetite-doped activated carbon fiber
 
AuthorsZhang, S1 2 3
Li, Xy1
Chen, JP3
 
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
 
CitationJournal Of Colloid And Interface Science, 2010, v. 343 n. 1, p. 232-238 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.jcis.2009.11.001
 
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.
 
ISSN0021-9797
2012 Impact Factor: 3.172
2012 SCImago Journal Rankings: 1.154
 
DOIhttp://dx.doi.org/10.1016/j.jcis.2009.11.001
 
ISI Accession Number IDWOS:000274548900033
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.

 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorZhang, S
 
dc.contributor.authorLi, Xy
 
dc.contributor.authorChen, JP
 
dc.date.accessioned2010-12-23T08:32:53Z
 
dc.date.available2010-12-23T08:32:53Z
 
dc.date.issued2010
 
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.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationJournal Of Colloid And Interface Science, 2010, v. 343 n. 1, p. 232-238 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.jcis.2009.11.001
 
dc.identifier.citeulike6190508
 
dc.identifier.doihttp://dx.doi.org/10.1016/j.jcis.2009.11.001
 
dc.identifier.epage238
 
dc.identifier.hkuros178452
 
dc.identifier.isiWOS:000274548900033
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.

 
dc.identifier.issn0021-9797
2012 Impact Factor: 3.172
2012 SCImago Journal Rankings: 1.154
 
dc.identifier.issue1
 
dc.identifier.openurl
 
dc.identifier.pmid20018292
 
dc.identifier.scopuseid_2-s2.0-74449084764
 
dc.identifier.spage232
 
dc.identifier.urihttp://hdl.handle.net/10722/129135
 
dc.identifier.volume343
 
dc.languageeng
 
dc.publisherAcademic Press. The Journal's web site is located at http://www.elsevier.com/locate/jcis
 
dc.publisher.placeUnited States
 
dc.relation.ispartofJournal of Colloid and Interface Science
 
dc.relation.referencesReferences in Scopus
 
dc.subjectActivated carbon fiber (ACF)
 
dc.subjectAdsorption
 
dc.subjectArsenate
 
dc.subjectMagnetite
 
dc.subjectX-ray photoelectron spectroscopy (XPS)
 
dc.titleAn XPS study for mechanisms of arsenate adsorption onto a magnetite-doped activated carbon fiber
 
dc.typeArticle
 
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Author Affiliations
  1. The University of Hong Kong
  2. Clemson University
  3. National University of Singapore