Characterizing uranium solubilization under natural near oxic conditions
2006Springer, Berlin/Heidelberg
Article in Anthology
Angenommene Version
Englisch
DOI: https://doi.org/10.1007/3-540-28367-6_42
Persistent URL: http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/6982
Persistent URL: http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/6982
Noubactep, Chicgoua; Merten, Dirk; Heinrichs, Till; Sonnefeld, Jürgen; Sauter, Martin, 2006: Characterizing uranium solubilization under natural near oxic conditions. In: Uranium in the Environment, DOI: 10.1007/3-540-28367-6_42.
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A 782 d solubilization study using not shaken batch experiments and involving one uranium-bearing rock and three natural carbonate minerals was conducted to characterize uranium (U) leaching under oxic conditions. Results showed that aqueous U concentration increased continuously with a solubilization rate of 0.16 mgm-2h-1 for the first 564 d (1.5 y). After 1.5 y, U concentration reached a maximum value (saturation) and decreased afterwards. The saturation concentration of 54 mgL-1 (mean value) was influenced to various extent by the presence of carbonate minerals. Dissolution/precipitation, adsorption or ion exchange processes appear to control U solubilization.
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