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- W18014082 abstract "The leaching of UO/sub 2/ in sulfuric acid solutions was investigated and the rate of leaching was measured by determining the concentration of UO/sub 2//sup ++/ in solution as a function of time. The rate was determined as a function of the agitation of the solution, acid concentration, and overpressure of oxygen. A mechanism was postulated that satisfied the experimental observations. The leaching of uranium was found to be linear over the range of time under all the conditions investigated, and the rate was observed to be directly proportional to the partial pressure of oxygen. The rate at various concentrations of ions was determined to be a function of the concentration of H/ sup +/ ions. Evidences are presented that a UO/sub 2/ site on the surface of UO/ sub 2/ reacts with a molecule of water to form a hydroxyl complex which in turn can dissociate simliar to an acid. The rate determining step was found to be the reaction between an oxygen molecule and a hydroxyl complex of uranium on the surface of UO/sub 2/. Calculations of the energy of activation for the over-all process using the arrhenius equation was found to be 18 kcal/mole. Wlth this valuemore » it was estimated that one site for every 10 to 20 surface sites was active. (auth)« less" @default.
- W18014082 created "2016-06-24" @default.
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- W18014082 date "1957-09-15" @default.
- W18014082 modified "2023-09-27" @default.
- W18014082 title "KINETICS OF DISSOLUTION OF UO$sub 2$ IN SULFURIC ACID. Technical Report No. XXVIII" @default.
- W18014082 hasPublicationYear "1957" @default.
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