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Characterizing uranium solubilization under natural near oxic conditions
Journal
Uranium in the Environment
Date Issued
2006
Author(s)
Editor(s)
Merkel, B. J.
Hasche-Berger, A.
DOI
10.1007/3-540-28367-6_42
Abstract
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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