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dc.contributor.advisorRamsey, William G.
dc.contributor.advisorToghiani, Rebecca K.
dc.contributor.authorMohammad, Javeed
dc.date2002
dc.date.accessioned2020-08-19T16:02:52Z
dc.date.available2020-08-19T16:02:52Z
dc.identifier.urihttps://hdl.handle.net/11668/18940
dc.description.abstractA laboratory scale study was carried out on a set of 6 borosilicate waste glasses made from simulated high-level nuclear waste. The test matrix was designed to explore the composition region suitable for the long-term geologic disposal of high-temperature-and high-waste-containing glasses. The glass compositions were selected to achieve maximum waste loading without a sacrifice in glass durability. The relationship between glass composition and chemical durability was examined. The qualitative effect of increasing B2O3 content on the overall waste glass leaching behavior has also been addressed. The glass composition matrix was designed by systematically varying the factors: %waste loading and (SiO2+Frit):B2O3 ratio, with (SiO2:Frit) ratio being held constant. In order to assess the chemical durability, the Product Consistency Test (ASTM C-1285) was performed. Under PCT protocol, crushed glass was allowed to react with ASTM type I water under static conditions. All leachate solutions were analyzed by the technique; Inductively Coupled Plasma-Atomic Emission Spectroscopy (ICP-AES). A statistical regression technique was utilized to model the normalized release of the major soluble elements, Na, Si, and B, as a function of the individual as well as interactive chemical effects (B2O3, Al2O3, Fe2O3, MnO, SiO2, SrO, Na2O, B2O3*SiO2, B2O3*Al2O3, Fe2O3*Na2O, Al2O3*Na2O, and MnO*SiO2). Geochemical modeling was performed using the computer code EQ3/6 to: (1) determine the saturation states of the possible silicate minerals, a-cristobalite and chalcedony; and (2) predict the most stable mineral phase based on the mineral thermodynamic data. Mineral/water interactions were analyzed by representing the resultant glass data on a Na-Al-Si-O-H stability diagram.
dc.publishermississippi State University
dc.subject.lccRadioactive wastes--Vitrification--Testing.
dc.subject.lccSoil vitrification--Testing.
dc.subject.lccRadioactive waste disposal in the ground--Technological innovations.
dc.subject.lccRadioactive waste disposal in the ground--Storage--Safety measures.
dc.subject.lccHazardous wastes--Solidification--Testing.
dc.subject.otherBorosilicate Glass
dc.subject.otherGlass Structure
dc.subject.otherGlass Leaching
dc.subject.otherThermodynamic Stability
dc.subject.otherChemical Durability
dc.subject.otherWaste Loading
dc.titleOptimization of High-Level Waste Loading in a Borosilicate Glass Matrix by Using Chemical Durability Modeling Approach
dc.typeThesis
dc.publisher.departmentDepartment of Chemical Engineering.
dc.publisher.collegeBagley College of Engineering
dc.date.authorbirth1977
dc.subject.degreeMaster of Science
dc.subject.majorChemical Engineering
dc.contributor.committeeToghiani, Hossein


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