Adsorption of sulfate and phosphate at the mineral-water interface: isotherm, stoichiometry, and models

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dc.contributor.authorHe, Limingen
dc.contributor.committeecochairZelazny, Lucian W.en
dc.contributor.committeecochairMartens, David C.en
dc.contributor.committeememberBaligar, V. C.en
dc.contributor.committeememberRitchey, K. Daleen
dc.contributor.departmentCrop and Soil Environmental Sciencesen
dc.date.accessioned2014-03-14T21:23:04Zen
dc.date.adate2005-11-10en
dc.date.available2014-03-14T21:23:04Zen
dc.date.issued1995-10-15en
dc.date.rdate2005-11-10en
dc.date.sdate2005-11-10en
dc.description.abstractProcesses occurring at mineral-water interfaces play critical roles for regulating the composition of surface and groundwater, for soil development, and for the availability of plant nutrients. Sulfate adsorption at three pH levels was conducted on y-AI203 and kaolinite. The adsorption isotherms were described well by the simple Langmuir, two-site Langmuir, Freundlich, and Temkin equations. The capacity of SO42-adsorption for y-AI203 was five times greater than for kaolinite, indicating the difference in reactive site density between y-Ab03 and kaolinite. Mathematical analyses for the adsorption isothenns demonstrated that S042- may not be adsorbed on the d-plane, i.e., in the diffuse layer, whereas both outer- and inner-sphere complexation mechanisms predicted S042- adsorption equally well.en
dc.description.degreePh. D.en
dc.format.extentxiv, 187 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-11102005-141116en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-11102005-141116/en
dc.identifier.urihttp://hdl.handle.net/10919/40310en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V856_1995.H3.pdfen
dc.relation.isformatofOCLC# 34269124en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectmineral-water interfaceen
dc.subject.lccLD5655.V856 1995.H3en
dc.titleAdsorption of sulfate and phosphate at the mineral-water interface: isotherm, stoichiometry, and modelsen
dc.typeDissertationen
dc.type.dcmitypeTexten
thesis.degree.disciplineCrop and Soil Environmental Sciencesen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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