A Critical Evaluation of the Redox Properties of Uranium, Neptunium and Plutonium Ions in Acidic Aqueous Solutions

Standard redox potentials, s, and redox processes of U, Np and Pu ions in acidic aqueous solutions are reviewed and evaluated critically. The of reversible redox processes, MO /MO and M /M (M: U, Np or Pu) adopted are those proposed mainly by Riglet et al. on the basis of the precise correction of f...

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Bibliographic Details
Published inPure and applied chemistry Vol. 71; no. 9; pp. 1771 - 1807
Main Authors Kihara, Sorin, Yoshida, Zenko, Aoyagi, Hisao, Maeda, Kohji, Shirai, Osamu, Kitatsuji, Yoshihiro, Yoshida, Yumi
Format Journal Article
LanguageEnglish
Published Berlin De Gruyter 01.09.1999
Walter de Gruyter GmbH
Subjects
Abbreviations
Activity coefficients
Aquatic plants
Aqueous solutions
Chemical reactions
Coulometers
Coulometry
Disproportionation
Electrodes
Electrolysis
Neptunium
Plutonium
Plutonium dioxide
Polarography
Redox reactions
Reduction
Temperature dependence
Voltammetry
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Summary:Standard redox potentials, s, and redox processes of U, Np and Pu ions in acidic aqueous solutions are reviewed and evaluated critically. The of reversible redox processes, MO /MO and M /M (M: U, Np or Pu) adopted are those proposed mainly by Riglet et al. on the basis of the precise correction of formal potentials, s, according to the improved theoretical approach to estimate the activity coefficient. Electrode processes of the U, Np and Pu ions are discussed in terms of current-potential curves, measured so far by polarography, voltammetry or flow coulometry. Special attention is payed to the irreversible MO /M reactions. Disproportionation reactions of MO are also discussed. New substances are introduced as intermediates during reductions of MO to M or disproportionations of MO
ISSN:0033-4545
1365-3075
DOI:10.1351/pac199971091771