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dc.contributor.advisorJames, Bruce Ren_US
dc.contributor.authorDeSarle, Catherine Roseen_US
dc.date.accessioned2014-10-16T05:35:00Z
dc.date.available2014-10-16T05:35:00Z
dc.date.issued2014en_US
dc.identifierhttps://doi.org/10.13016/M2760W
dc.identifier.urihttp://hdl.handle.net/1903/15887
dc.description.abstractHexavalent chromium (Cr(VI)) is a carcinogen and a pollutant of soils and natural waters. The standard method to extract and quantify total Cr(VI) in soils and waste materials was modified to prevent method-induced reduction of Cr(VI) by not heating (95°C) but shaking (100 cycles/min) at 23°C, followed by quantification using the 1,5-diphenylcarbazide method or ion chromatography. Forms of carbon and Cr(VI) (mineralogical vs. soluble) significantly influenced method-induced reduction. The proposed method should be used with samples containing ≥ 10 g/kg organic C. The new method was used to study the reduction of Cr(VI) in soils with Fe(II), Fe(III), and organic carbon, and the Cr in remediated soils was fractionated. Fe(II) in combination with Fe(III) was the most effective at reducing Cr(VI) and immobilizing newly-reduced Cr(III). The extraction and quantification refinements are relevant to accurate and precise metrics for Cr(VI) and its remediation in soils.en_US
dc.language.isoenen_US
dc.titleHEXAVALENT CHROMIUM QUANTIFICATION AND REMEDIATION IN SOILS AND WASTE MATERIALSen_US
dc.typeThesisen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.contributor.departmentEnvironmental Science and Technologyen_US
dc.subject.pqcontrolledSoil sciencesen_US
dc.subject.pqcontrolledEnvironmental scienceen_US
dc.subject.pqcontrolledChemistryen_US
dc.subject.pquncontrolledchromiumen_US
dc.subject.pquncontrolledcontaminated soilen_US
dc.subject.pquncontrolledextraction methoden_US
dc.subject.pquncontrolledmethod-induced reductionen_US
dc.subject.pquncontrolledremediationen_US


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