Abstract:The purpose of this paper was to study the oxidation of uranium species coming from some Romanian uranium ores at U(VI), in the presence of the following oxidizing agents: KMnO 4 /H 2 SO 4, H 2 O 2 and HCl+HNO 3. There was ascertained that the highest capacity of leaching is shown by KMnO 4 /H 2 SO 4 that achieved values of almost 100% after about 7 days. This fact was explained through the chemical and mineralogical composition of the studied ores.
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