Interaction of tetravalent plutonium and zirconium with citric acid in nitric acid solutions
The interaction of Pu(IV) and Zr(IV) with citric acid in nitric acid solutions (C/sub HNO/sub 3// greater than 0.1 M) of lithium nitrate was studied by the distribution method in the interval of nitrate ion concentrations from 1 to 6 g-eq/liter. A 40 percent solution of TBP in decane was used as the extraction reagent. It was established that within the range of concentrations studied, complex compounds of plutonium and zirconium are formed: PuHCit/sup 2 +/ and ZrH/sub 2/Cit/sup 3 +/. The concentration equilibrium constants of the reactions of formation of these compounds retain a constant value at constant ionic strength and undergo substantial variation when the total concentration of the nitrate ion in solution is varied. The values of the effective equilibrium constants, calculated considering the change in the activity coefficient of the hydrogen ion, retain a constant value within a wide range of nitrate ion concentrations. It was shown that the effectiveness of the separation of plutonium and zirconium by extraction with TBP increases with increasing concentration of the electrolyte.
- OSTI ID:
- 7273403
- Journal Information:
- Sov. Radiochem. (Engl. Transl.); (United States), Vol. 17:2; Other Information: Translated from Radiokhimiya; 17: No. 2, 284-287(1975)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CITRIC ACID
CHEMICAL REACTIONS
PLUTONIUM COMPOUNDS
ZIRCONIUM COMPOUNDS
AQUEOUS SOLUTIONS
CATIONS
DECANE
EQUILIBRIUM
LITHIUM NITRATES
NITRIC ACID
SOLVENT EXTRACTION
TBP
ACTINIDE COMPOUNDS
ALKALI METAL COMPOUNDS
ALKANES
BUTYL PHOSPHATES
CARBOXYLIC ACIDS
CHARGED PARTICLES
DISPERSIONS
ESTERS
EXTRACTION
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXY ACIDS
INORGANIC ACIDS
IONS
LITHIUM COMPOUNDS
MIXTURES
NITRATES
NITROGEN COMPOUNDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHORIC ACID ESTERS
SEPARATION PROCESSES
SOLUTIONS
TRANSITION ELEMENT COMPOUNDS
TRANSURANIUM COMPOUNDS
400702* - Radiochemistry & Nuclear Chemistry- Properties of Radioactive Materials