Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jcis.2009.11.001
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dc.titleAn XPS study for mechanisms of arsenate adsorption onto a magnetite-doped activated carbon fiber
dc.contributor.authorZhang, S.
dc.contributor.authorLi, X.-y.
dc.contributor.authorChen, J.P.
dc.date.accessioned2014-10-08T08:31:45Z
dc.date.available2014-10-08T08:31:45Z
dc.date.issued2010-03-01
dc.identifier.citationZhang, S., Li, X.-y., Chen, J.P. (2010-03-01). An XPS study for mechanisms of arsenate adsorption onto a magnetite-doped activated carbon fiber. Journal of Colloid and Interface Science 343 (1) : 232-238. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jcis.2009.11.001
dc.identifier.issn00219797
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/87456
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.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.jcis.2009.11.001
dc.sourceScopus
dc.subjectActivated carbon fiber (ACF)
dc.subjectAdsorption
dc.subjectArsenate
dc.subjectMagnetite
dc.subjectX-ray photoelectron spectroscopy (XPS)
dc.typeArticle
dc.contributor.departmentDIVISION OF ENVIRONMENTAL SCIENCE & ENGG
dc.description.doi10.1016/j.jcis.2009.11.001
dc.description.sourcetitleJournal of Colloid and Interface Science
dc.description.volume343
dc.description.issue1
dc.description.page232-238
dc.description.codenJCISA
dc.identifier.isiut000274548900033
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