Sorption of technetium and rhenium on natural sorbents under aerobic conditions

Vinsova, H.; Konirova, R.; Koudelkova, M.; Jedinakova-Krizova, V.
August 2004
Journal of Radioanalytical & Nuclear Chemistry;Aug2004, Vol. 261 Issue 2, p407
Academic Journal
The uptake of technetium on bentonite materials has been studied from the point of view of the characterization of long-term radioactive elements behavior in nuclear waste repository. It is generally known that bentonite materials show an excellent cation-exchange capacity and on the other hand a poor uptake of anions. The aim of our research has been to find out the conditions suitable for technetium sorption on selected bentonite under oxidizing conditions. The influence of the addition of different materials (e.g., activated carbon, graphite, Fe2+, Fe) with bentonite, the effect of solid:aqueous phase ratio and a pH value on the percentage of technetium uptake and on the Kd values were tested.


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