Abstract
The chemical stability of Pb[(UO2)2O2(OH)2](H2O) and Pb2[(UO2)5O6(OH)2](H2O)2 compounds in aqueous solutions was studied. The acid-base boundaries of the existence of these compounds in aqueous solutions were established, the hydrolysis products were identified, and their solubility was determined. Based on the data obtained, the equilibrium constants of dissolution reactions, the Gibbs functions of the formation and dissolution of Pb[(UO2)2O2(OH)2](H2O) and Pb2[(UO2)5O6(OH)2](H2O)2 were calculated, the solubility curves of the compounds under study, and the phase diagrams of U(VI) and Pb(II) in saturated aqueous solutions and in equilibrium solid phases were constructed.
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The work was carried out with the financial support of the Ministry of Education and Science of the Russian Federation (basic part of the state task, project no. FSWR-2023-0025).
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Nipruk, O.V., Klinshova, K.A., Chernorukov, G.N. et al. Chemical Stability of Pb[(UO2)2O2(OH)2](H2O) and Pb2[(UO2)5O6(OH)2](H2O)2 Compounds in Aqueous Solutions. Russ J Gen Chem 93, 2549–2559 (2023). https://doi.org/10.1134/S1070363223100109
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DOI: https://doi.org/10.1134/S1070363223100109