SORPTION OF URANIUM FROM CARBONATE SOLUTIONS BY INORGANIC SORBENTS .12. KINETICS 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., SORPTION OF URANIUM FROM CARBONATE SOLUTIONS BY INORGANIC SORBENTS .12. KINETICS OF U-SORPTION BY THERMOXIDE-5 DURING SORPTION DESORPTION CYCLES, Soviet radiochemistry, 33(2), 1991, pp. 191-193
Citations number
3
Journal title
Soviet radiochemistry → ACNP
ISSN journal
0038576X
Volume
33
Issue
2
Year of publication
1991
Pages
191 - 193
Database
ISI
SICI code
0038-576X(1991)33:2<191:SOUFCS>2.0.ZU;2-I
Abstract
The kinetics of U sorption on Thermoxide-5 during sorption-desorption cycles from 20 to 65-degrees-C with various initial [U] in marine-type carbonate solutions at pH = 7.85 are studied. The free energy of acti vation for sorption increases with each cycle and becomes constant in 3-5 cycles, corresponding to the free energy of activation of irrevers ible chemosorption of U. The generalized rate constants for the chemos orption and ion-exchange steps of U sorption by Thermoxide-5 are calcu lated.