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1986•Sov. Radiochem. (Engl. Transl.); (United States)Requires access

Production and stability of tetra- and hexavalent americium in solutions of sodium carbonate

V.Ya. Frenkel, P.L. Khizhnyak, I.A. Lebedev, B. F. Myasoedov

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Abstract

This paper investigates the electrochemical oxidation of americium(III) in solutions of sodium carbonate. At pH = 10, as a result of oxidation, americium(IV) is obtained, while at pH 11, americium(IV) is obtained. A spectrophotometric investigation of the stability of tetra- and hexavalent americium at various temperatures showed that Am(VI) is reduced to Am(V) according to a first-order reaction, the activation energy of which is equal to 63.8 + or - 5.4 kJ/ mole, while Am(IV) disproportionates to form Am(III) and Am(V) and is reduced.

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This paper investigates the electrochemical oxidation of americium(III) in solutions of sodium carbonate. At pH = 10, as a result of oxidation, americium(IV) is obtained, while at pH 11, americium(IV) is obtained. A spectrophotometric investigation of the stability of tetra- and hexavalent americium at various temperatures showed that Am(VI) is reduced to Am(V) according to a first-order reaction, the activation energy of which is equal to 63.8 + or - 5.4 kJ/ mole, while Am(IV) disproportionates to form Am(III) and Am(V) and is reduced.

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Available abstract

This paper investigates the electrochemical oxidation of americium(III) in solutions of sodium carbonate. At pH = 10, as a result of oxidation, americium(IV) is obtained, while at pH 11, americium(IV) is obtained. A spectrophotometric investigation of the stability of tetra- and hexavalent americium at various temperatures showed that Am(VI) is reduced to Am(V) according to a first-order reaction, the activation energy of which is equal to 63.8 + or - 5.4 kJ/ mole, while Am(IV) disproportionates to form Am(III) and Am(V) and is reduced.

Key concepts: Americium, Chemistry, Sodium carbonate, Inorganic chemistry, Sodium, Electrochemistry, Nuclear chemistry, Carbonate

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