Advertisement

Radiochemistry

, Volume 54, Issue 2, pp 143–148 | Cite as

Reduction of Pu(IV) and Np(VI) with carbohydrazide in nitric acid solution

  • V. I. Volk
  • V. I. Marchenko
  • K. N. Dvoeglazov
  • V. N. Alekseenko
  • S. I. Bychkov
  • E. Yu. Pavlyukevich
  • V. V. Bondin
  • A. S. D’yachenko
Article

Abstract

The reduction of Pu(IV) and Np(VI) with carbohydrazide (NH2NH)2CO in 1–6 M HNO3 solutions was studied. The Pu(IV) reduction is described by a first-order rate equation with respect to Pu(IV). At [HNO3] ≥ 3 M, the reaction becomes reversible. The rate constants of the forward and reverse reactions were determined, and their activation energies were estimated. Neptunium(VI) is reduced to Np(V) at a high rate, whereas the subsequent reduction of Np(V) to Np(IV) is considerably slower and is catalyzed by Fe and Tc ions. The possibility of using carbohydrazide for stabilizing desired combinations of Pu and Np valence states was examined.

Keywords

carbohydrazide nitric acid solutions plutonium neptunium ions reduction kinetics catalysis technetium iron 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Marchenko, V.I., Dvoeglazov, K.N., and Volk, V.I., Radiokhimiya, 2009, vol. 51, no. 4, pp. 289–302.Google Scholar
  2. 2.
    Kurzer, F. and Wilkinson, M., Chem. Rev., 1970, vol. 70, no. 1, pp. 111–149.CrossRefGoogle Scholar
  3. 3.
    Kalinichenko, I.I., Ivanov, M.G., and Titov, N.M., Zh. Neorg. Khim., 1984, vol. 29, no. 4, pp. 926–928.Google Scholar
  4. 4.
    Ivanov, N.M. and Kalinichenko, I.I., Zh. Neorg. Khim., 1981, vol. 26, no. 2, pp. 411–413.Google Scholar
  5. 5.
    Ivanov, N.M. and Kalinichenko, I.I., Zh. Neorg. Khim., 1984, vol. 29, no. 5, pp. 1237–1240.Google Scholar
  6. 6.
    Ivanov, N.M. and Kalinichenko, I.I., Zh. Neorg. Khim., 1984, vol. 29, no. 5, pp. 2159–2162.Google Scholar
  7. 7.
    McBride, W.R., Henry, R.A., and Skolnik, S., Anal. Chem., 1953, vol. 25, no. 7, pp. 1042–1046.CrossRefGoogle Scholar
  8. 8.
    Panchenkov, G.M. and Lebedev, V.P., Khimicheskaya kinetika i kataliz (Chemical Kinetics and Catalysis), Moscow: Khimiya, 1974.Google Scholar
  9. 9.
    Koltunov, V.S., Tikhonov, M.F., and Frolov, K.M., Radiokhimiya, 1981, vol. 23, no. 4, pp. 559–566.Google Scholar
  10. 10.
    Koltunov, V.S., J. Nucl. Sci. Technol., 2002, suppl. 3, pp. 347–350.Google Scholar
  11. 11.
    Koltunov, V.S., Taylor, R.J., Mezhov, E.A., et al., in Proc. Int. Conf. ATALANTE 2000, Avignon (France), 2000, paper 01-06.Google Scholar

Copyright information

© Pleiades Publishing, Ltd. 2012

Authors and Affiliations

  • V. I. Volk
    • 1
  • V. I. Marchenko
    • 1
  • K. N. Dvoeglazov
    • 1
  • V. N. Alekseenko
    • 2
  • S. I. Bychkov
    • 2
  • E. Yu. Pavlyukevich
    • 1
  • V. V. Bondin
    • 2
  • A. S. D’yachenko
    • 2
  1. 1.Bochvar High-Tech Institute of Inorganic MaterialsPublic Joint-Stock CompanyMoscowRussia
  2. 2.Mining and Chemical CombineFederal State Unitary EnterpriseZheleznogorsk, Krasnoyarsk kraiRussia

Personalised recommendations