URANIUM SORPTION FROM CARBONATE SOLUTIONS BY INORGANIC SORBENTS .11. THERMODYNAMICS OF U-SORPTION BY THERMOXIDE-5 DURING SORPTION DESORPTION CYCLES

Authors
NURIEV AN AKPEROV GA KOMAREVSKII VM MAMEDOV RM NOVIKOV YP
Citation
An. Nuriev et al., URANIUM SORPTION FROM CARBONATE SOLUTIONS BY INORGANIC SORBENTS .11. THERMODYNAMICS OF U-SORPTION BY THERMOXIDE-5 DURING SORPTION DESORPTION CYCLES, Soviet radiochemistry, 33(2), 1991, pp. 187-190
Citations number
3
Journal title
Soviet radiochemistry → ACNP
ISSN journal
0038576X
Volume
33
Issue
2
Year of publication
1991
Pages
187 - 190
Database
ISI
SICI code
0038-576X(1991)33:2<187:USFCSB>2.0.ZU;2-N
Abstract
The thermodynamics of U sorption on Thermoxide-5 from 20 to 65-degrees -C with various initial [U] (from 2.6.10(-5) to 8.4.10(-4) M) in marin e-type carbonate solution at pH = 7.85 is studied during sorption-deso rption cycles. The entropy, enthalpy, and free energy of U sorption ch ange from cycle to cycle. The sorption is found to occur in two steps consisting of reversible (ion-exchange) and irreversible (chemosorptio n) steps.