Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/44621
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dc.contributor.authorShen, Y.S.en_US
dc.contributor.author王尚禮zh_TW
dc.contributor.authorWang, S.L.en_US
dc.contributor.authorHuang, S.T.en_US
dc.contributor.authorTzou, Y.M.en_US
dc.contributor.authorHuang, J.H.en_US
dc.contributor.author鄒裕民zh_TW
dc.date2010zh_TW
dc.date.accessioned2014-06-06T08:12:54Z-
dc.date.available2014-06-06T08:12:54Z-
dc.identifier.issn0304-3894zh_TW
dc.identifier.urihttp://hdl.handle.net/11455/44621-
dc.description.abstractIn this study, the removal mechanism of Cr(VI) from water by coconut coir (CC) was investigated using Xray photoelectron spectroscopy (XPS), Cr K-edge X-ray absorption near edge structure (XANES) and FTIR spectroscopy. The results showed that, upon reaction with CC at pH 3, Cr(VI) was reduced to Cr(III), which was either bound to CC or released back into solution. As revealed by the FTIR spectra of CC before and after reacting with Cr(VI), the phenolic methoxyl and hydroxyl groups of lignin in CC are the dominant drivers of Cr(VI) reduction, giving rise to carbonyl and carboxyl groups on CC. These functional groups can subsequently provide binding sites for Cr(III) resulting from Cr(VI) reduction. In conjunction with forming complexes with carbonyl and carboxyl groups, the formation of Cr(III) hydroxide precipitate could also readily occur as revealed by the linear combination fitting of the Cr K-edge XANES spectrum using a set of reference compounds. The phenolic groups in lignin are responsible for initiating Cr(VI) reduction, so lignocellulosic materials containing a higher amount of phenolic groups are expected to be more effective scavengers for removal of Cr(VI) from the environment. (C) 2010 Elsevier B.V. All rights reserved.en_US
dc.language.isoen_USzh_TW
dc.relationJournal of Hazardous Materialsen_US
dc.relation.ispartofseriesJournal of Hazardous Materials, Volume 179, Issue 1-3, Page(s) 160-165.en_US
dc.relation.urihttp://dx.doi.org/10.1016/j.jhazmat.2010.02.073en_US
dc.subjectLignocelluloseen_US
dc.subjectHexavalent chromiumen_US
dc.subjectReductionen_US
dc.subjectSorptionen_US
dc.subjectTrivalenten_US
dc.subjectchromiumen_US
dc.subjectSurface precipitationen_US
dc.subjectx-ray-absorptionen_US
dc.subjectnear-edge structureen_US
dc.subject2p photoelectron-spectraen_US
dc.subjectlow-cost adsorbentsen_US
dc.subjecthexavalent chromiumen_US
dc.subjectwaste-wateren_US
dc.subjectagriculturalen_US
dc.subjectwasteen_US
dc.subjectaqueous-solutionsen_US
dc.subjectheavy-metalsen_US
dc.subjectremovalen_US
dc.titleBiosorption of Cr(VI) by coconut coir: Spectroscopic investigation on the reaction mechanism of Cr(VI) with lignocellulosic materialen_US
dc.typeJournal Articlezh_TW
dc.identifier.doi10.1016/j.jhazmat.2010.02.073zh_TW
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