Theses and Dissertations
Issuing Body
Mississippi State University
Advisor
Gabitov, Rinat I.
Committee Member
Migdisov, Artaches
Committee Member
Kirkland, Brenda L.
Date of Degree
5-1-2020
Original embargo terms
Worldwide
Document Type
Graduate Thesis - Open Access
Major
Geology Concentration in Geoscience
Degree Name
Master of Science
College
College of Arts and Sciences
Department
Department of Geosciences
Abstract
The traditional paradigm declares tetravalent uranium to be immobile under reducing conditions – an assumption widely employed for nuclear waste management strategies. In contrast, experiments presented here demonstrate this assumption, although valid for low temperatures, can be erroneous for high temperature natural systems. This project focuses on the ability of sulfate-bearing solutions to transport uranium at reduced conditions and elevated temperatures, identifies the new species U(OH)2SO4, derives thermodynamic constants necessary for modeling, and expands the quantifiable range of U4+ mobility to more neutral pH conditions. The data obtained enable more accurate assessment of uranium mobility by updating the existing uranium thermodynamic databases and is applicable to uranium fluid transport in oreorming systems and nuclear waste repositories.
URI
https://hdl.handle.net/11668/16936
Sponsorship
Research presented in this thesis was supported by the Laboratory Directed Research and Development program of Los Alamos National Laboratory under project numbers 20180007DR, 20180094DR and by the CSES Emerging Ideas R&D grants (LANL) to A.M (20180475DR).
Recommended Citation
van Hartesveldt, Noah, "Uranium solubility in high temperature, reduced systems" (2020). Theses and Dissertations. 4856.
https://scholarsjunction.msstate.edu/td/4856