Authors:
Steven SmithPacific Northwest National Laboratory Advanced Radioanalytical Chemistry Group, Physical and Chemical Science Division MSIN P7-07 P.O. Box 999 Richland WA 99352 USA

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Shane PeperPacific Northwest National Laboratory Advanced Radioanalytical Chemistry Group, Physical and Chemical Science Division MSIN P7-07 P.O. Box 999 Richland WA 99352 USA

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Matthew DouglasPacific Northwest National Laboratory Advanced Radioanalytical Chemistry Group, Physical and Chemical Science Division MSIN P7-07 P.O. Box 999 Richland WA 99352 USA

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Kate ZiegelgruberPacific Northwest National Laboratory Advanced Radioanalytical Chemistry Group, Physical and Chemical Science Division MSIN P7-07 P.O. Box 999 Richland WA 99352 USA

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Erin FinnPacific Northwest National Laboratory Advanced Radioanalytical Chemistry Group, Physical and Chemical Science Division MSIN P7-07 P.O. Box 999 Richland WA 99352 USA

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Abstract  

Bench scale experiments were conducted to determine the dissolution characteristics of UO2, U3O8, and UO3 in aqueous peroxide-containing carbonate solutions. The experimental parameters investigated included carbonate countercation (NH4+, Na+, K+, and Rb+) and H2O2 concentration. The carbonate countercation had a dramatic influence on the dissolution behavior of UO2 in 1 M carbonate solutions containing 0.1 M H2O2, with the most rapid dissolution occurring in (NH4)2CO3 solution. The initial dissolution rate (y) of UO2 in 1 M (NH4)2CO3 increased linearly with peroxide concentration (x) ranging from 0.05 to 2 M according to: y = 2.41x + 1.14. The trend in initial dissolution rates for the three U oxides under study was UO3 ≫ U3O8 > UO2.

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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)

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