Abstract
A kientic isotope effect in Pu(V) disproportionation in nitric acid solutions have been observed in a heterogeneous system with phenyloctylphosphonic acid deposited on hydrophobized silicagel. The isotope separation coefficient α for242Pu/239Pu isotopes was found to be 1.022 at 25°C. The rate constant of Pu(V) disproportionation in this heterogeneous system was determined to be 5.0±0.6 12mol−2s−1 at 25°C, [HNO3]= 0.87–1.5 mol l−1 and 1∶1 phase ratio (10% extractant on the support).
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Extraction Chromatography, (Eds by T. Braun and G. Gersini) Akadémiai Kiadó, Budapest, 1975.
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Garnov, Y.Y., Nikitenko, S.I. Kinetic isotope effect in pentavalent plutonium disproportionation in heterogeneous systems. Journal of Radioanalytical and Nuclear Chemistry Letters 187, 151–157 (1994). https://doi.org/10.1007/BF02162663
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DOI: https://doi.org/10.1007/BF02162663