Abstract:Abstract. The purpose of the present work was to study the oxidation of uranium species coming from different samples of 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 royal water. It was established that the highest capacity of leaching is shown by KMnO 4 /H 2 SO 4 that achieved values of ca. 100% in about seven days. This chemical reaction was explained through the chemical and mineralogical composition of the studied samples.
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