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Separation of Am (V,VI) from Cm(III) and Pr(III) in Ammonia and Ammonium Carbonate Media
- Authors: Osin P.A.1, Trofimov T.I.1, Kulyako Y.M.1, Vinokurov S.E.1, Myasoedov B.F.1
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Affiliations:
- Vernadsky Institute of Geochemistry and Analytical Chemistry
- Issue: Vol 67, No 1 (2025)
- Pages: 53-57
- Section: Articles
- URL: https://journals.rcsi.science/0033-8311/article/view/307978
- DOI: https://doi.org/10.31857/S0033831125010076
- ID: 307978
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Abstract
New approaches to the selective isolation of Am from the actinide–lanthanide fraction of high-level wastes with preliminary oxidation of Am(III) to Am(V) and Am(VI) using ammonia and ammonia–carbonate media are proposed. It was found that, when ammonium hydroxide is added to a 0.1 M HNO3 solution containing Am(V), Cm(III) and Pr(III) (as a mimic of the behavior of lanthanides) to pH ~8, AmO2+ shows increased stability and is retained in solution up to 80%, and Cm(III) and Pr(III) in the form of poorly soluble compounds precipitate. It was also found that, in ammonia–carbonate solutions at pH ~10, up to 96% of the initial amount of Am(VI) is retained in the solution, and Cm(III) and Pr(III) precipitate to 85%.
About the authors
P. A. Osin
Vernadsky Institute of Geochemistry and Analytical Chemistry
Email: Posingeohi@rambler.ru
ul. Kosygina 19, Moscow, 119991 Russia
T. I. Trofimov
Vernadsky Institute of Geochemistry and Analytical Chemistry
Email: Posingeohi@rambler.ru
ul. Kosygina 19, Moscow, 119991 Russia
Y. M. Kulyako
Vernadsky Institute of Geochemistry and Analytical Chemistry
Email: Posingeohi@rambler.ru
ul. Kosygina 19, Moscow, 119991 Russia
S. E. Vinokurov
Vernadsky Institute of Geochemistry and Analytical Chemistry
Email: Posingeohi@rambler.ru
ul. Kosygina 19, Moscow, 119991 Russia
B. F. Myasoedov
Vernadsky Institute of Geochemistry and Analytical Chemistry
Author for correspondence.
Email: Posingeohi@rambler.ru
ul. Kosygina 19, Moscow, 119991 Russia
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