A Study of Kinetics of Oxidation Reaction of Uranium (Ⅲ) with Oxygen in the Air

Abstract

Abstract: The oxidation reaction of uranium (Ⅲ) in the hydrochloric acid solution with oxygen in the air was investigated. It was found that the oxidation rate was proportional to [U(Ⅲ)] and [Cl^-]^-1/2in hydrochloric acid solution and [O₂]₍₆₎^1/4 in air. Moreover, the rates were nearly independent of [H⁺] in the range of 0. 2-2 mol/L. The oxidation rate increased with increasing temperature. The apparent activation energy was found to be 3-1. 3 kJ/mol in the temperatures of 10 to 40℃ region. It is suggested that the reaction may be a catalytic oxidation process.

Key words: Trivalent uranium, Oxidation kinetics, Activation energy

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Zhou Zu-ming, Zhao Lei-hong, Qin Qi-zong . A Study of Kinetics of Oxidation Reaction of Uranium (Ⅲ) with Oxygen in the Air[J]. Chem. J. Chinese Universities, 1991, 12(4): 498.

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A Study of Kinetics of Oxidation Reaction of Uranium (Ⅲ) with Oxygen in the Air

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