Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jcis.2010.12.070
DC FieldValue
dc.titleCharacterization of hexavalent chromium interaction with Sargassum by X-ray absorption fine structure spectroscopy, X-ray photoelectron spectroscopy, and quantum chemistry calculation
dc.contributor.authorZheng, Y.-M.
dc.contributor.authorLiu, T.
dc.contributor.authorJiang, J.
dc.contributor.authorYang, L.
dc.contributor.authorFan, Y.
dc.contributor.authorWee, A.T.S.
dc.contributor.authorChen, J.P.
dc.date.accessioned2014-06-17T05:29:14Z
dc.date.available2014-06-17T05:29:14Z
dc.date.issued2011-04-15
dc.identifier.citationZheng, Y.-M., Liu, T., Jiang, J., Yang, L., Fan, Y., Wee, A.T.S., Chen, J.P. (2011-04-15). Characterization of hexavalent chromium interaction with Sargassum by X-ray absorption fine structure spectroscopy, X-ray photoelectron spectroscopy, and quantum chemistry calculation. Journal of Colloid and Interface Science 356 (2) : 741-748. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jcis.2010.12.070
dc.identifier.issn00219797
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/58983
dc.description.abstractHexavalent chromium represents higher toxicity in aqueous solutions. It can be removed by such low-cost biosorbents as Sargassum sp. In this study, X-ray absorption fine structure spectroscopy, X-ray photoelectron spectroscopy, and quantum chemistry (QC) calculation were used to study the interactions between hexavalent chromium and Sargassum sp. during the biosorption. It was found that most of the adsorbed Cr(VI) ions were reduced to Cr(III) after the biosorption. The electrons for the reduction of Cr(VI) were possibly supplied from the Sargassum biomass, some organic compounds of which were oxidized. Cr(III) ions were coordinated with the oxygen atoms from either carboxyl or hydroxyl functional groups to form an octahedral structural metal complex. The coordination numbers of the formed Cr complex were 4-6, and bond length of Cr-O was 1.98. Å. QC calculation proved the possible formation of the Cr(III) metal complex, and revealed that carboxyl from biomass could be strongly bound with Cr(III). A three-step removal mechanism of Cr(VI) by Sargassum was proposed. © 2010 Elsevier Inc.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.jcis.2010.12.070
dc.sourceScopus
dc.subjectBiosorption
dc.subjectChromium
dc.subjectComplexation
dc.subjectQuantum chemistry calculation
dc.subjectReduction
dc.subjectSpectroscopic analysis
dc.typeArticle
dc.contributor.departmentCHEMICAL & BIOMOLECULAR ENGINEERING
dc.contributor.departmentSINGAPORE SYNCHROTRON LIGHT SOURCE
dc.contributor.departmentCIVIL & ENVIRONMENTAL ENGINEERING
dc.contributor.departmentPHYSICS
dc.description.doi10.1016/j.jcis.2010.12.070
dc.description.sourcetitleJournal of Colloid and Interface Science
dc.description.volume356
dc.description.issue2
dc.description.page741-748
dc.description.codenJCISA
dc.identifier.isiut000288527800047
Appears in Collections:Staff Publications

Show simple item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

25
checked on Sep 18, 2019

WEB OF SCIENCETM
Citations

23
checked on Sep 10, 2019

Page view(s)

88
checked on Sep 8, 2019

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.