Peculiarities of the kinetics and mechanism of certain redox reactions of neptunium, plutonium, and uranium

Journal Article · Tue Dec 31 23:00:00 EST 1974 · Sov. Radiochem. (Engl. Transl.); (United States)

OSTI ID:7185315

Koltunov, V S; Zhuravleva, G I; Marchenko, V I; Tikhonov, M F

The kinetics of eight redox reactions of U, Np, and Pu in solutions of HClO/sub 4/ and HNO/sub 3/ was studied by a spectrophotometric method. Equations are given for the rate of reduction of Np(VI) and Np(V) by hydrazine, the disproportionation of NpO/sub 2//sup +/ ions, the oxidation of Pu(III) and reduction of Pu(IV) by nitrous acid, the oxidation of Pu(IV) by Mn/sup 3 +/ and MnO/sub 4//sup -/ ions, and the oxidation of U(IV) by nitrous acid in the presence of Fe(III). The values of the rate constant were found, and the thermodynamic parameters of activation were calculated for all the indicated reactions. The reaction mechanisms are discussed. 5 tables.

• OSTI ID: 7185315
• Journal Information: Sov. Radiochem. (Engl. Transl.); (United States), Journal Name: Sov. Radiochem. (Engl. Transl.); (United States) Vol. 17:2; ISSN SVRDA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400702* -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ACTINIDE COMPOUNDS
CATIONS
CHARGED PARTICLES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IONS
KINETICS
NEPTUNIUM COMPOUNDS
NITRIC ACID
PERCHLORIC ACID
PLUTONIUM COMPOUNDS
REACTION KINETICS
REDOX REACTIONS
SPECTROPHOTOMETRY
TRANSURANIUM COMPOUNDS
URANIUM COMPOUNDS