Kinetic study of the dissolution of uraninite

Journal Article · Tue Nov 30 23:00:00 EST 1976 · Econ. Geol.; (United States)

DOI:https://doi.org/10.2113/gsecongeo.71.8.1493· OSTI ID:5171111

Grandstaff, D E

The kinetics of uraninite dissolution in water may be summarized by the equation: R = (-d(uran)/dt) = 10/sup 20/./sup 25/ (SS) (RF)/sup -1/ (10/sup -3.38-10.8 NOC/) (a/sub ..sigma..CO/sub 2//) (D.O.) (a/sub H/sup +//) exp (-7045/T) day/sup -1/ where R is the rate of the dissolution reaction, SS is the specific surface area (cm/sup 2/-gm/sup -1/), RF is an organic retardation factor, NOC is the mole fraction of nonuranium cations in the uraninite, D.O. is the dissolved oxygen content of the water (ppM), ..sigma..CO/sub 2/ is the total dissolved carbonate, and T is the absolute temperature. Application of these data may allow better understanding of factors influencing oxidation of uraninite and the resulting mobility of uranium in natural waters.

• Research Organization: Temple Univ., Philadelphia
• OSTI ID: 5171111
• Journal Information: Econ. Geol.; (United States), Journal Name: Econ. Geol.; (United States) Vol. 71:8; ISSN ECGLA
• Country of Publication: United States
• Language: English

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ACTINIDES
AQUEOUS SOLUTIONS
CHEMISTRY
DISPERSIONS
DISSOLUTION
ELEMENTS
EQUATIONS
GEOCHEMISTRY
HYDROGEN COMPOUNDS
KINETIC EQUATIONS
METALS
MINERALS
MIXTURES
OXYGEN COMPOUNDS
RADIOACTIVE MATERIALS
RADIOACTIVE MINERALS
SOLUTIONS
URANINITES
URANIUM
URANIUM MINERALS
WATER