Photochemical reduction of the uranyl ion by phosphorus acid amides in aqueous solutions

Journal Article · Sun Sep 01 04:00:00 EDT 1985 · Sov. Radiochem. (Engl. Transl.); (United States)

OSTI ID:5454665

Yakshin, V V; Afonichev, D D; Kazakova, V P; Khokhlova, N L

The authors investigate the photochemical reduction of the uranyl ion by hexamethyphosphoric triamide and hexaethylphosphoric triamide molecules in aqueous sulfuric acid solutions, upon irradiation with light of wavelength 313 nm. The quantum yield of the photoreduction has been determined at various HMPA concentrations. It has been shown that a maximum quantum yield is reached at equal concentrations of uranyl ion and HMPA. The relation between the quantum yield and the temperature has been found. A reaction mechanism which includes a transfer of an oxygen atom from the uranyl ion to the HMPA is proposed for the photo reduction of the uranyl ion by HMPA molecules.

• OSTI ID: 5454665
• Journal Information: Sov. Radiochem. (Engl. Transl.); (United States), Journal Name: Sov. Radiochem. (Engl. Transl.); (United States) Vol. 27:1; ISSN SVRDA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400500* -- Photochemistry
400702 -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ACTINIDE COMPOUNDS
AMIDES
AQUEOUS SOLUTIONS
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
DECOMPOSITION
DISPERSIONS
ELEMENTS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
KINETICS
MIXTURES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN
PHOSPHORIC ACID
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
QUANTITY RATIO
REACTION KINETICS
REDUCTION
SOLUTIONS
SULFURIC ACID
TEMPERATURE DEPENDENCE
URANIUM COMPOUNDS
URANYL COMPOUNDS
YIELDS