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

被引:0
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作者
NURIEV, AN
AKPEROV, GA
KOMAREVSKII, VM
MAMEDOV, RM
NOVIKOV, YP
机构
来源
SOVIET RADIOCHEMISTRY | 1991年 / 33卷 / 02期
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中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
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 marine-type carbonate solution at pH = 7.85 is studied during sorption-desorption cycles. The entropy, enthalpy, and free energy of U sorption change from cycle to cycle. The sorption is found to occur in two steps consisting of reversible (ion-exchange) and irreversible (chemosorption) steps.
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页码:187 / 190
页数:4
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