Persistent Link:
http://hdl.handle.net/10150/192042
Title:
Adsorption of Hexavalent Chromium on Koalinite and Illite.
Author:
Ward, Nancy Erica,1960-
Issue Date:
1990
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Adsorption of hexavalent chromium on two commonly occurring clay minerals, illite (Fithian, IL) and kaolinite (Mesa Alta, NM), was investigated over the pH range 4.0-8.5. Batch experiments were conducted to determine the kinetics of chromium adsorption and the adsorption edge. Reactions were complete in ten hours. Chromium removal was 100% effective at low pH's and aluminum dissolution minimal. Adsorption results were modeled using MINTEQ and the Triple Layer Model. Experimental data indicated that chromium was bound at the aluminum site on kaolinite, and at both the aluminum and silica sites on illite. Iron coatings were not extensive enough to effect sorption. Discrepancies between simulated and experimental data were explained by high surface loading. Surface complexation constants determined for illite and kaolinite may be added to the thermodynamic databases of geochemical models for predicting concentrations of chromium in the aquatic environment.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Kaolinite.; Illite.; Chromium.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Hydrology and Water Resources; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Bassett, Randy

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleAdsorption of Hexavalent Chromium on Koalinite and Illite.en_US
dc.creatorWard, Nancy Erica,1960-en_US
dc.contributor.authorWard, Nancy Erica,1960-en_US
dc.date.issued1990en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractAdsorption of hexavalent chromium on two commonly occurring clay minerals, illite (Fithian, IL) and kaolinite (Mesa Alta, NM), was investigated over the pH range 4.0-8.5. Batch experiments were conducted to determine the kinetics of chromium adsorption and the adsorption edge. Reactions were complete in ten hours. Chromium removal was 100% effective at low pH's and aluminum dissolution minimal. Adsorption results were modeled using MINTEQ and the Triple Layer Model. Experimental data indicated that chromium was bound at the aluminum site on kaolinite, and at both the aluminum and silica sites on illite. Iron coatings were not extensive enough to effect sorption. Discrepancies between simulated and experimental data were explained by high surface loading. Surface complexation constants determined for illite and kaolinite may be added to the thermodynamic databases of geochemical models for predicting concentrations of chromium in the aquatic environment.en_US
dc.description.notehydrology collectionen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshKaolinite.en_US
dc.subject.lcshIllite.en_US
dc.subject.lcshChromium.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineHydrology and Water Resourcesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairBassett, Randyen_US
dc.identifier.oclc221707573en_US
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