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Redox equilibria of Pu4+/Pu3+ and PuO22+/Pu4+ couples in molten NaCl-CsCl eutectic as measured by absorption spectrophotometry
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Takayuki Nagai
Veröffentlicht/Copyright:
25. September 2009
Abstract
In order to enhance the understanding of redox reactions of plutonium ions in molten NaCl-CsCl eutectic, absorption spectrophotometry was performed for Pu3+, Pu4+, and PuO22+ in molten NaCl-CsCl at 923 K by controlling the flow-rate ratio of Cl2 and Ar or O2 in the ventilating mixture gas. Based upon the relations of the measured rest potentials to the concentration ratios of [Pu4+]/[Pu3+] and [PuO22+]/[Pu4+], the redox potentials of Pu4+/Pu3+ and PuO22+/Pu4+ couples in molten NaCl-CsCl eutectic at 923 K were estimated.
Published Online: 2009-9-25
Published in Print: 2009-5-1
© by Oldenbourg Wissenschaftsverlag, München, Germany
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Artikel in diesem Heft
- Preface
- Solubility of Pu and rare-earths in LiCl-Li2O melt
- Solubility of plutonium in MgCl2 and CaCl2 solutions in contact with metallic iron
- Complex formation and solubility of Pu(IV) with malonic and succinic acids
- New insights in the formation processes of Pu(IV) colloids
- Redox equilibria of Pu4+/Pu3+ and PuO22+/Pu4+ couples in molten NaCl-CsCl eutectic as measured by absorption spectrophotometry
- In search of an optimum plutonium density measurement fluid
- Some aspects of neptunium acetohydroxamic acid chemistry under acidic conditions
- Excitation spectra of near-infrared photoluminescence from Np(VI) in Cs2U(Np)O2Cl4
- Study of reaction of curium oxy-compound formation in molten chlorides
- Extraction behaviour of actinides and lanthanides in TALSPEAK, TRUEX and NPEX processes of UREX+
- Effect of oxide ions on separation factors of actinides from lanthanides in reductive extraction
- Solid phase precipitates in (Zr,Th)-OH-(oxalate, malonate) ternary aqueous system
- The adsorption of ammonia on polycrystalline thorium
- Formation and stability of actinide oxides: a valence band photoemission study
- Plutonium traces in atmospheric precipitation and in aerosols from Krakow and Bialystok
- Plutonium in the environment: key factors related to impact assessment in case of an accidental atmospheric release
- Unveiling the history of seized plutonium through nuclear forensic investigations
Schlagwörter für diesen Artikel
Plutonium;
Formal redox potential;
Absorption spectroscopy;
NaCl-CsCl eutectic
Artikel in diesem Heft
- Preface
- Solubility of Pu and rare-earths in LiCl-Li2O melt
- Solubility of plutonium in MgCl2 and CaCl2 solutions in contact with metallic iron
- Complex formation and solubility of Pu(IV) with malonic and succinic acids
- New insights in the formation processes of Pu(IV) colloids
- Redox equilibria of Pu4+/Pu3+ and PuO22+/Pu4+ couples in molten NaCl-CsCl eutectic as measured by absorption spectrophotometry
- In search of an optimum plutonium density measurement fluid
- Some aspects of neptunium acetohydroxamic acid chemistry under acidic conditions
- Excitation spectra of near-infrared photoluminescence from Np(VI) in Cs2U(Np)O2Cl4
- Study of reaction of curium oxy-compound formation in molten chlorides
- Extraction behaviour of actinides and lanthanides in TALSPEAK, TRUEX and NPEX processes of UREX+
- Effect of oxide ions on separation factors of actinides from lanthanides in reductive extraction
- Solid phase precipitates in (Zr,Th)-OH-(oxalate, malonate) ternary aqueous system
- The adsorption of ammonia on polycrystalline thorium
- Formation and stability of actinide oxides: a valence band photoemission study
- Plutonium traces in atmospheric precipitation and in aerosols from Krakow and Bialystok
- Plutonium in the environment: key factors related to impact assessment in case of an accidental atmospheric release
- Unveiling the history of seized plutonium through nuclear forensic investigations
