Effects of the Presence of Pyrite and Carbonate Minerals on the Kinetics of the Uranium Release from a Natural Rock
Preprint2006
2006-11 (Erscheinungsjahr der gedruckten Vorlage)
DOI: https://doi.org/10.1007/s10967-006-0352-x
Persistent URL: http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/6797
Persistent URL: http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/6797
Noubactep, C.; Sonnefeld, J.; Merten, D.; Heinrichs, T.; Sauter, M., 2006: Effects of the Presence of Pyrite and Carbonate Minerals on the Kinetics of the Uranium Release from a Natural Rock. In: Journal of Radioanalytical and Nuclear Chemistry, Band 270, 270: 325 - 333, DOI: 10.1007/s10967-006-0352-x.
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The influence of calcite, dolomite, pyrite and vaterite on the kinetics of uranium (U) release
from a natural rock under relevant i.e. field conditions has been investigated. The time
dependence of the U release has been studied in two different experimental procedures (open
and closed systems) at laboratory temperature (21 ± 2 °C). Performing batch experiments in
tap water, the U release efficiency of a natural U-bearing rock was characterised in the
presence of varying amounts of three different carbonate bearing minerals for experimental
durations of up to 782 days. Another experiment was conducted for a period of 14 days in the
presence of a pyrite mineral. The results demonstrate that the presence of carbonate minerals
does not have any significant influence on U release in closed systems where the U
concentration at saturation was ca. 54 mg/L. In contrast, in open systems, the U concentration
was ca. 8 mg/L at saturation and the effects of all additives both on kinetics and saturation
concentration of U were apparent.
Statistik:
ZugriffsstatistikSammlung:
- Geologie [931]