Affiliation:
1. Lobachevsky State University of Nizhni Novgorod
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 the 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 calculated.
Publisher
The Russian Academy of Sciences