Issue 10, 2024

Neglected solid phase pentavalent plutonium carbonate in the environment

Abstract

KPuO2CO3 solid phase precipitation from hexavalent plutonium (Pu(VI)) solution is discussed herein. The kinetic process of Pu(V)/potassium carbonate formation is widely investigated under constant control of Pu concentration in different oxidation states, redox potentials, and pH values. Synchrotron-based X-ray diffraction, X-ray absorption spectroscopy, high-resolution transmission electron microscopy, and scanning electron microscopy with energy-dispersive X-ray spectroscopy are employed for solid phase analysis. The crystal structure of KPuO2CO3 is specified via the Rietveld method and extended X-ray absorption fine structure fitting. The stability area of Pu(V) potassium carbonate is discussed and a moderated Pourbaix diagram is presented.

Graphical abstract: Neglected solid phase pentavalent plutonium carbonate in the environment

Supplementary files

Article information

Article type
Paper
Submitted
04 Apr 2024
Accepted
20 Aug 2024
First published
04 Sep 2024

Environ. Sci.: Nano, 2024,11, 4381-4390

Neglected solid phase pentavalent plutonium carbonate in the environment

A. S. Kuzenkova, T. V. Plakhova, R. D. Svetogorov, E. S. Kulikova, A. L. Trigub, V. O. Yapaskurt, A. V. Egorov, A. S. Toropov, A. A. Averin, M. D. Shaulskaya, D. M. Tsymbarenko, A. Yu. Romanchuk and S. N. Kalmykov, Environ. Sci.: Nano, 2024, 11, 4381 DOI: 10.1039/D4EN00283K

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