Abstract
The acidity of the ore is of crucial importance in uranium extraction. As the passage of uranium into solution involves various chemical processes and is complicated by the presence of impurities in the ores, it is necessary to study the mechanism of uranium oxidation and the influence of various compounds which pass into solution during the leaching of the uranium ore. In this paper are presented the results of an investigation into the oxidation and solution of uranium oxide in acid media and the influence on these processes of divalent iron compounds. For the first time the effects on uranium of various oxidizing agents are compared. It is shown that the oxidation of tetravalent uranium is not determined simply by the normal oxidation-reduction potential. The results obtained show that where considerable quantities of iron ions are present incomplete uranium extraction by a mixture of nitric and sulphuric acids in low concentrations is associated with the formation of complexes between Fe 2, SO 4 staggered2− and NO 3 staggered− ions.
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Schedule a callMore From: Journal of Nuclear Energy. Parts A/B. Reactor Science and Technology
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