Authors:
J. Cabicar Technical University of Prague Faculty of Nuclear Science and Physical Engineering, Department of Nuclear Chemistry Břehová 7 11519 Prague 1 (Czechoslovakia)

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A. Gosman Technical University of Prague Faculty of Nuclear Science and Physical Engineering, Department of Nuclear Chemistry Břehová 7 11519 Prague 1 (Czechoslovakia)

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J. Plicka Technical University of Prague Faculty of Nuclear Science and Physical Engineering, Department of Nuclear Chemistry Břehová 7 11519 Prague 1 (Czechoslovakia)

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K. Štamberg Technical University of Prague Faculty of Nuclear Science and Physical Engineering, Department of Nuclear Chemistry Břehová 7 11519 Prague 1 (Czechoslovakia)

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Abstract  

The kinetics of isotope exchange in the238U(VI)-233U(VI)-strongly acidic cation exchanger Ostion KS system was studied in the temperature range 275–307K and for total uranium concentration 2.94·10−4–1.75·10−2 mol·l−1 in UO2(NO3)2 solution. The experimental results were evaluated by means of the “two-film mass-transfer model” and by the use of Fick's diffusion equations which have been proved more suitable for the system studied than McKay's equation. The influence of the temperature was evaluated using the Arrhenius equation. The diffusion character of the process follows also from the value of the activation energy (15.12 kJ·mol−1). In comparison with the UO 22+ ↔H+ ion exchange6 the isotope exchange studied is faster and less dependent on temperature (the activation energy is substantially lower).

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)