Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/44775
DC FieldValueLanguage
dc.contributor.authorTzou, Y.M.en_US
dc.contributor.author鄒裕民zh_TW
dc.contributor.authorLoeppert, R.H.en_US
dc.contributor.authorWang, M.K.en_US
dc.date2002zh_TW
dc.date.accessioned2014-06-06T08:13:14Z-
dc.date.available2014-06-06T08:13:14Z-
dc.identifier.issn0038-075Xzh_TW
dc.identifier.urihttp://hdl.handle.net/11455/44775-
dc.description.abstractAlthough Cr(III) is considered a Cr species with low mobility and toxicity, the potential oxidation of Cr(III) to Cr(VI) in soils containing Mn requires further scientific attention because of the acute toxicity of Cr(VI). This study evaluates the inhibition or enhancement of Cr(III) oxidation by Mn oxide in the presence of various organic ligands and concentrations. Batch experiments indicate that 200 muM of organic ligands inhibited 20 muM Cr(III) oxidation by Mn oxide at pH 4 because of the occurrence of reductive dissolution of Mn oxide. Although oxalate did not show strong inhibition of Cr(III) oxidation at pH 10, nevertheless, citrate and N-hydroxyethyl-ethylenediamine-triacetic acid (HEDTA) ligands did retard Cr(III) oxidation. It is possible that the co-precipitation of Cr(III) and organic ligand, which has a low dissociation constant, results in low release of Cr(III) and subsequent oxidation. The current results imply that the management of Cr(III)-containing waste is very important to prevent potential oxidation of Cr(III) by Mn oxides, particularly at low pH. However, the presence of organic ligands in the field may lead to low Cr(III) oxidation where Cr(III) waste is disposed.en_US
dc.language.isoen_USzh_TW
dc.relationSoil Scienceen_US
dc.relation.ispartofseriesSoil Science, Volume 167, Issue 11, Page(s) 729-738.en_US
dc.relation.urihttp://dx.doi.org/10.1097/01.ss.0000038065.29390.46en_US
dc.subjectMnOxen_US
dc.subjectoxidationen_US
dc.subjectHEDTAen_US
dc.subjectcitrateen_US
dc.subjectoxalateen_US
dc.subjectreductive dissolutionen_US
dc.subjectchromium(iii) oxidationen_US
dc.subjectmanganeseen_US
dc.subjectbirnessiteen_US
dc.subjectprecipitationen_US
dc.subjectdelta-mno2en_US
dc.subjecthydroxideen_US
dc.subjectoxidesen_US
dc.titleEffect of organic complexing ligands on Cr(III) oxidation by MnOxen_US
dc.typeJournal Articlezh_TW
dc.identifier.doi10.1097/01.ss.0000038065.29390.46zh_TW
item.fulltextno fulltext-
item.languageiso639-1en_US-
item.openairetypeJournal Article-
item.cerifentitytypePublications-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.grantfulltextnone-
Appears in Collections:土壤環境科學系
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