Characterizing uranium solubilization under natural near oxic conditions
Merten, Dirk
Heinrichs, Till
Sonnefeld, Jürgen
Sauter, Martin
Merkel, B. J.
Hasche-Berger, A.
DOI: https://doi.org/10.1007/3-540-28367-6_42
Persistent URL: http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/6982
Noubactep, Chicgoua; Merten, Dirk; Heinrichs, Till; Sonnefeld, Jürgen; Sauter, Martin, Merkel, B. J.; Hasche-Berger, A. (Ed.),2006: Characterizing uranium solubilization under natural near oxic conditions . In: Springer , DOI: https://doi.org/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.