State of uranyl phosphates and arsenates in aqueous solutions |
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| Authors: | O V Nipruk N G Chernorukov Yu P Pykhova N S Godovanova A A Eremina |
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| Affiliation: | 1.Lobachevsky Nizhni Novgorod State University,Nizhni Novgorod,Russia |
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| Abstract: | The state of uranyl phosphates and arsenates (UO2)3(PO4)2·nH2O and (UO2)3(AsO4)2·nH2O in aqueous solutions in the interval of pH 1–14 was studied by X-ray diffraction, IR spectroscopy, thermography, and chemical
analysis. The composition and structure of the initial solid phases vary depending on the solution acidity. The equilibrium
constants of the reactions occurring in the heterogeneous systems (UO2)3(BVO4)2·nH2O (BV = P, As)-aqueous solution were calculated. The speciation diagrams of the solid phases and equilibrium solutions were plotted. |
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