Kinetics of neptunium(VI) reduction by Kojic acid

Journal Article · Wed Aug 10 04:00:00 EDT 1988 · Inorg. Chem.; (United States)

DOI:https://doi.org/10.1021/ic00289a006· OSTI ID:5775001

Kim, W H; Choppin, G R

The kinetics for Np(VI) reduction by kojic acid, HK, have been studied at tracer level concentrations of Np(VI) in aqueous chloride media. The empirical rate expression for the reaction was found to be /minus/d(Np(VI))/dt = k(Np(VI))(HK)/sub T//(H/sup +/), where T denotes the total concentration. Rate constant and activation parameters have been determined at an ionic strength of 1.0 M (NaCl) and 25.0/degree/C to be k = 1.63 /plus minus/ 0.08 s/sup /minus/1/, /Delta/H/double dagger/ = 82.7 /plus minus/ 3.4 kJ/mol, and /Delta/S/double dagger/ = 34 /plus minus/ 12 J/(mol/center dot/K). The rate decreases with increasing ionic strength. A reaction mechanism is discussed. 26 references, 3 figures, 3 tables.

• Research Organization: Florida State Univ., Tallahassee (USA)
• OSTI ID: 5775001
• Journal Information: Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 27:16; ISSN INOCA
• 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
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DATA
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
INFORMATION
KINETICS
NEPTUNIUM COMPOUNDS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
REACTION KINETICS
REDOX REACTIONS
REDUCTION
TRANSURANIUM COMPOUNDS