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http://hdl.handle.net/11375/24082
Title: | Sorption Study of Se(-II) onto Illite, Bentonite, and Shale Under High Ionic Strength Conditions |
Authors: | Walker, Andrew |
Advisor: | Nagasaki, Shinya |
Department: | Engineering Physics |
Keywords: | selenium;reducing condition;sorption;distribution coefficient;anion;surface complex |
Publication Date: | 2018 |
Abstract: | Due to the very long half-life of Se-79 and its presence in used nuclear fuel, Se is an element of interest in the safety assessment for a deep geological repository (DGR) for used nuclear fuel. Sorption of radionuclides onto the surrounding host rocks and engineered barrier materials is a potential retardation mechanism for radionuclide transport. This thesis investigates the sorption of Se(-II) onto illite, bentonite (engineered barrier material), and shale under high ionic strength conditions relevant to a Canadian DGR. The ionic strength and pH dependence of Se(-II) sorption onto illite, bentonite, and shale were studied. A non-electrostatic surface complexation model was also developed for Se(-II) sorption onto illite and montmorillonite to investigate the sorption mechanisms by which Se(-II) sorbs onto these solids. |
URI: | http://hdl.handle.net/11375/24082 |
Appears in Collections: | Open Access Dissertations and Theses |
Files in This Item:
File | Description | Size | Format | |
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Walker_Andrew_T_201809_MASc.pdf | 2.12 MB | Adobe PDF | View/Open |
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