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1995•Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and AtomsRequires access

STUDY ON THE STABILTY OF URANIUM(IV)IN NITRIC ACID AND ORGANIC MEDIA

Zukang Zhou

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Abstract

The stability of uranium(Ⅳ)in nitric acid and tributyl Phospate(TBP)-kerosene media is investigated. The effects of concentrations of uranium(Ⅳ),nitric acid,TBP in the aqueous or or-ganic solution and the oxygen in gas phase on the oxidation rate of uranium(Ⅳ)are examined.The oxidation rates of uranium(Ⅳ)in both media increase obvisoly with increasing temperatureand the apparent activation eneries are 91kJ/mol for nitric acid medium and 42kJ/mol for TBP-kerosene medium. The regularities of oxidation rate of uranium(Ⅳ)in nitric acid and TBP.kerosene media are compared.

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What this paper is about

The stability of uranium(Ⅳ)in nitric acid and tributyl Phospate(TBP)-kerosene media is investigated. The effects of concentrations of uranium(Ⅳ),nitric acid,TBP in the aqueous or or-ganic solution and the oxygen in gas phase on the oxidation rate of uranium(Ⅳ)are examined.The oxidation rates of uranium(Ⅳ)in both media increase obvisoly with increasing temperatureand the apparent activation eneries are 91kJ/mol for nitric acid medium and 42kJ/mol for TBP-kerosene medium. The regularities of oxidation rate of uranium(Ⅳ)in nitric acid and TBP.kerosene media are compared.

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Available abstract

The stability of uranium(Ⅳ)in nitric acid and tributyl Phospate(TBP)-kerosene media is investigated. The effects of concentrations of uranium(Ⅳ),nitric acid,TBP in the aqueous or or-ganic solution and the oxygen in gas phase on the oxidation rate of uranium(Ⅳ)are examined.The oxidation rates of uranium(Ⅳ)in both media increase obvisoly with increasing temperatureand the apparent activation eneries are 91kJ/mol for nitric acid medium and 42kJ/mol for TBP-kerosene medium. The regularities of oxidation rate of uranium(Ⅳ)in nitric acid and TBP.kerosene media are compared.

Key concepts: Nitric acid, Uranium, Chemistry, Kerosene, Tributyl phosphate, Nuclear chemistry, Inorganic chemistry, Oxygen

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