Electrochemical production and stability of americium(IV) in sodium carbonate solutions

Journal Article · Thu May 01 00:00:00 EDT 1986 · Sov. Radiochem. (Engl. Transl.); (United States)

OSTI ID:5397943

Frenkel, V Y; Khizhnyak, P L; Lebedev, I A; Myasoedov, B F

The authors investigate the electrochemical oxidation of Am(III) in solution containing 1.3-2 M Na/sub 2/CO/sub 3/ at pH 9-12.1. It was established that at an anode potential greater than or equal to 0.9 V, Am(III) is entirely oxidized to Am(IV) if the pH of the solution does not exceed 10.1, and to Am(VI) at pH 11-12.1. Americium (VI) in carbonate solution at pH 11.25 is slowly reduced to Am(V) according to a first order reaction. At 25 degrees C the half-reduction time is equal to ca 14 h, and the activation energy of this reaction is equal to 63.8 kJ/mole.

• OSTI ID: 5397943
• Journal Information: Sov. Radiochem. (Engl. Transl.); (United States), Journal Name: Sov. Radiochem. (Engl. Transl.); (United States) Vol. 27:5; ISSN SVRDA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400* -- Electrochemistry
ABSORPTION SPECTRA
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ACTINIDES
ACTIVATION ENERGY
ALKALI METAL COMPOUNDS
ALPHA DECAY RADIOISOTOPES
AMERICIUM
AMERICIUM 241
AMERICIUM 243
AMERICIUM ISOTOPES
CARBON COMPOUNDS
CARBONATES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
CURIUM 244
CURIUM ISOTOPES
ELECTROCHEMISTRY
ELECTROLYSIS
ELEMENTS
ENERGY
EVEN-EVEN NUCLEI
HEAVY NUCLEI
ISOTOPES
KINETICS
LYSIS
METALS
NUCLEI
ODD-EVEN NUCLEI
OXIDATION
OXYGEN COMPOUNDS
PH VALUE
RADIOISOTOPES
REACTION KINETICS
REDOX POTENTIAL
REDUCTION
SODIUM CARBONATES
SODIUM COMPOUNDS
SPECTRA
STABILITY
TRANSPLUTONIUM ELEMENTS
TRANSURANIUM ELEMENTS
VALENCE
YEARS LIVING RADIOISOTOPES