Submissions to Scholars Junction will be closed starting Monday, December 21, as we begin migrating to a new platform.

    • Login
    View Item  
    •   Scholars Junction
    • Theses and Dissertations
    • Theses and Dissertations
    • View Item
    •   Scholars Junction
    • Theses and Dissertations
    • Theses and Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Search

    My Account

    Login Register

    About

    About This Repository Deposit Your Work Policies and Terms of Use Contact Us More Scholarly Communication Services

    Browse

    Entire Repository Communities & Collections Issue Date Authors Titles Subjects This Collection Issue Date Authors Titles Subjects

    Optimization of High-Level Waste Loading in a Borosilicate Glass Matrix by Using Chemical Durability Modeling Approach

    View/ Open
    etd-10282002-160552.pdf (3.899 Mb )
    Author
    Mohammad, Javeed
    Item Type
    Thesis
    Advisor
    Ramsey, William G.
    Toghiani, Rebecca K.
    Committee
    Toghiani, Hossein
    Metrics
    
    Abstract
    A 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.
    Degree
    Master of Science
    Major
    Chemical Engineering
    College
    Bagley College of Engineering
    Department
    Department of Chemical Engineering.
    URI
    https://hdl.handle.net/11668/18940
    Collections
    • Theses and Dissertations
    Show full item record
    Mississippi State University Libraries
    395 Hardy Rd
    P.O. Box 5408, Mississippi State, MS 39762-5408
    (662) 325-7668
    (662) 325-0011
    (662) 325-8183
    Contact repository admin Report a problem Terms of use Privacy policy Accessibility MSU Legal
     

     

    Mississippi State University Libraries
    395 Hardy Rd
    P.O. Box 5408, Mississippi State, MS 39762-5408
    (662) 325-7668
    (662) 325-0011
    (662) 325-8183
    Contact repository admin Report a problem Terms of use Privacy policy Accessibility MSU Legal