Kinetics of Am(VI) reduction in formate solutions
Creators
Description
The reaction of Am(VI) with HCO2H and HCO2- is studied by spectrophotometry. The reaction is first-order in Am(VI). Increasing [HCO2-] increases the rate and is accompanied by formation of the Am(VI) formate complex of reduced reactivity compared with AmO22+. The apparent activation energy in the range 25-48 degrees C is 60.7 ± 5.7 kJ/mole. The reaction products in solutions of pH 0.3-4 are Am(V) and Am(III) in a 1:0.25 ratio. Only Am(V) accumulates in solutions with pH > 4. A mechanism is discussed that includes formation of the activated complex through replacement of a H2O in the Am(VI) coordination sphere by HCO2-. Replacement of two H2O renders the complex unreactive. Traces of Pt accelerate the Am(VI) reduction. 12 refs., 4 figs., 2 tabs
Additional details
Publishing Information
- Journal Title
- Soviet Radiochemistry
- Journal Volume
- 34
- Journal Issue
- 4
- Journal Page Range
- p. 444-449.
- ISSN
- 0038-576X
- CODEN
- SVRDAX
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 24037458
- Subject category
- S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
- Resource subtype / Literary indicator
- Numerical Data, Translation
- Descriptors DEI
- ABSORPTION SPECTROSCOPY; ACTIVATION ENERGY; AMERICIUM; CHEMICAL REACTION KINETICS; EXPERIMENTAL DATA; FORMATES; PH VALUE; QUANTITY RATIO; REDUCTION; VALENCE
- Descriptors DEC
- ACTINIDES; CARBOXYLIC ACID SALTS; CHEMICAL REACTIONS; DATA; ELEMENTS; ENERGY; INFORMATION; KINETICS; METALS; NUMERICAL DATA; REACTION KINETICS; SPECTROSCOPY; TRANSPLUTONIUM ELEMENTS; TRANSURANIUM ELEMENTS
Optional Information
- Notes
- Cover-to-cover Translation of Radiokhimiya (USSR).