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Title of Article

INVESTIGATION OF HETEROGENEOUS EQUILIBRIUM IN THE SYSTEM AIHGeUO6•nH2O - AQUEOUS SOLUTION (AI - Li, Na, K, Rb, Cs, NH4)


Issue
4
Date
2014

Article type
scientific article
UDC
546.791.6
Pages
169-177
Keywords
uranogermanates, heterogeneous equilibria, solubility, solubility product, standard-state Gibbs free energy of formation,


Authors
Nipruk O.V.
Nizhegorodskiy gosuniversitet im. N.I. Lobachevskogo

Chernorukov N.G.
Nizhegorodskiy gosuniversitet im. N.I. Lobachevskogo

Zakharycheva N.S.
NII khimii Nizhegorodskogo gosuniversiteta im. N.I. Lobachevskogo

Kostrova E.L.
Nizhegorodskiy gosuniversitet im. N.I. Lobachevskogo


Abstract
Heterogeneous equilibriums in aqueous solutions of uranogermanates with general formula AIHGeUO6•nH2O (AI - Li, Na, K, Rb, Cs, NH4) are investigated in the pH scale range from 0 to 14. Acid-base boundaries of existence of the compounds in aqueous solutions are found and the products of their conversion and solubility are determined. Equilibrium constants for heterogeneous reactions and ?Gf for AIHGeUO6•nH2O are calculated. The solubility curves and the speciation diagrams of U (VI) and Ge (IV) in aqueous solutions and bottom solid phases are presented.

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