Thermodynamical Data of uranyl carbonate complexes from Absorption Spectroscopy
Thermodynamical Data of uranyl carbonate complexes from Absorption Spectroscopy
Götz, C.; Geipel, G.; Bernhard, G.
Aqueous uranyl carbonate complexes play an important role in the hydrogeology of uranium mining areas and nuclear waste disposals. Many publications are available for the stability of uranyl carbonate complexes, but thermodynamical data like the enthalpy or entropy are rare. We determined thermodynamical data from spectroscopic studies for the uranyl carbonate complex UO2(CO3)34- in the temperature range from 5°C to 70°C. We found for the reaction enthalpy the value 36.25 ± 4.31 kJ/mol and for the reaction entropy a value of 297.082 ± 13.839 J/(K∙mol).
Keywords: Uranyl; Carbonates; uranylcarbonate; thermodynamics; equilibrium constant
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Poster
5th International Conference Uranium Mining and Hydrogeology (UMH V), 14.-18.09.2008, Freiberg, Germany -
Contribution to external collection
Broder J. Merkel, Andrea Hasche-Berger: Uranium, Mining and Hydrogeology, Berlin: Springer Verlag, 2008, 978-3-540-87745-5, 907-914
Permalink: https://www.hzdr.de/publications/Publ-10966