Abstract
The distribution of uranium between different phases of cast stone matrices fabricated by fusion of basalt and uranium-bearing SiO2-based collectors was investigated. It was found that matrices created by fusion of basalt with SiO2 consist of glass, quartz, and spinel as the main phases. A study of the physicochemical properties of collectors based on 30 wt % UO2(NO3)2-bearing SiO2 showed that, after thermal treatment at a temperature of 973 K, they contain uranium only in the form of UO3. The uranium leaching in H2O from SiO2 after its thermal treatment, as well as from a basaltic melt with SiO2, was estimated.
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ACKNOWLEDGMENTS
X-ray phase analysis was carried out on an AERIS X-ray powder diffractometer (Malvern Panalytical, Netherlands) of the Center for the Collective Use of Physical Research Methods at the Frumkin Institute of Physical Chemistry and Electrochemistry.
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The study was carried out with the financial support of the Ministry of Science and Higher Education of the Russian Federation.
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Translated from Radiokhimiya, No. 2, pp. 158–163, April, 2022 https://doi.org/10.31857/S003383112202006X
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Kulemin, V.V., Martynov, K.V., Krasavina, E.P. et al. Cast Stone Matrices Based on Basaltic Melt with Uranium-Bearing Silica Gel. Radiochemistry 64, 158–163 (2022). https://doi.org/10.1134/S1066362222020060
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DOI: https://doi.org/10.1134/S1066362222020060