TRANSFORMACE BENTONITU V PODMÍNKÁCH ÚLOŽIŠTĚ RADIOAKTIVNÍHO ODPADU: GEOCHEMICKÝ MODEL

Dana Hanuláková, Josef Zeman

Abstrakt

Geochemical modeling is (1) one of the ways how to asses bentonite stability and (2) an effective method to define key processes of a bentonite transformation. A simulation of bentonite transformation was performed for various physical and chemical conditions. The influence of pore water and mineral composition was theoretically studied. The modeling has shown that the most important factor which influences stability of bentonite is initial water composition and the presence of accessory minerals such as pyrite and calcite. The type of montmorillonite that forms the main part of bentonite did not play a key role in the bentonite transformation. Initial mixture of Na-, K-, Ca-, montmorillonites was transformed mainly into Mg- and Ca-montmorillonites. Totally 3 to 9 wt. % of initial bentonite was transformed to the secondary minerals.

Bibliografická citace

Hanuláková, D., & Zeman, J. (2016). TRANSFORMACE BENTONITU V PODMÍNKÁCH ÚLOŽIŠTĚ RADIOAKTIVNÍHO ODPADU: GEOCHEMICKÝ MODEL. Geologické výzkumy na Moravě a ve Slezsku, 16. Získáno z https://journals.muni.cz/gvms/article/view/4795

Klíčová slova

montmorillonite transformation; bentonite; Mock-Up-CZ; geochemical modeling

Plný Text:

Reference

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Acros, D. – Grandia, F. – Domènech, C. (2006): Geochemical evolution of the near field of a KBS-3 repository. – SKB TR 06-16, 97 pp, Stockholm.
Bethke, C. M. (2005a): The Geochemist’s Workbench® Release 6.0. GWB esentials guide. University of Illinois, 76 pp.
Bethke, C. M. (2005b): The Geochemist’s Workbench® Release 6.0. Reaction modeling guide. University of Illinois, 74 pp.
Bethke, C. M. (2005c): The Geochemist’s Workbench® Release 6.0. Reference manual. University of Illinois, 241 pp.
Karnland, O. – Birgersson, M. (2006): Montmorillonite stability with special respect to KBS-3 conditions. – SKB TR 06-11, 38 pp. Stockholm.
Karnland, O. – Olsson, S. – Nilsson, U. (2006): Mineralogy and sealing properties of various bentonites and smectite-rich clay materials. – SKB TR-06-30, 117 pp. Stockholm.