Extraction of molybdenum and technetium with diamides of dipicolinic acid from nitric acid solutions

  • J. L. Lapka
  • A. Paulenova
  • M. Yu. Alyapyshev
  • V. A. Babain
  • R. S. Herbst
  • J. D. Law
Radiochemistry

Abstract

The concentration of molybdenum(VI) in dissolved spent nuclear fuel is comparable with the concentrations of Tc, and the minor actinides (Np, Am). Therefore it is of great interest to understand its behavior under conditions imposed by separation processes. The simultaneous extraction ability of ortho, meta, and para isomers of N,N′-diethyl-N,N′-ditolyl-dipicolinamide (EtTDPA) for molybdenum and technetium were investigated in a large range of nitric and hydrochloric acid conditions. Molybdenum shows no increase in extraction at higher concentrations of nitric acid giving a solvate number n=0 with all isomers of EtTDPA, while Mo shows great extractability from HCl. Technetium distribution ratios decrease with increasing concentrations of nitrate showing indication of ion exchange occurring between TcO4 and NO3 anions. Et(m)TDPA and Et(p)TDPA show the greatest extractability, with 60% of the total technetium extracted into the organic phase at 1M HNO3.

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References

  1. 1.
    T A. Todd, K. N. Brewer, J. D. Law, D. J. Wood, R. S. Herbst, V. N. Romanovskiy, V. M. Esimantovskiy, I. V. Smirnov, V. A. Babain, Czechoslovak Journal of Physics, Vol. 49 (1999).Google Scholar
  2. 2.
    E. K. Rzhekhina, V. G. Karkozov, M. Yu. Alyapyshev, V. A. Babain, I. V. Smirnov, P. A. Todd, J. D. Law, R. S. Herbst, Radiochemistry, 49(No. 5) (2007) 493.CrossRefGoogle Scholar
  3. 3.
    J. D. Law, R. S. Herbst, T. A. Todd, D. R. Peterman, V. N. Romanovskiy, V. M. Esimantovskiy, I. V. Smirnov, V. A. Babain, B. N. Zaitsev, WM’01 Conference, Tucson, AZ, February 25–March 1 (2001).Google Scholar
  4. 4.
    S. I. Sinkov, B. M. Rapko, G. J. Lumetta, B. P. Hay, Inorg. Chem., 43 (2004) 8404.CrossRefGoogle Scholar
  5. 5.
    B. M. Rapko, B. K. McNamara, R. D. Rogers, G. J. Lumetta, B. P. Hay, Inorg. Chem., 38 (1999) 4585.CrossRefGoogle Scholar
  6. 6.
    A. Shimada, T. Yaita, H. Narita, S. Tachimori, K. Okuno, Solv. Extr. Ion Exch., 22 (2004) 147.CrossRefGoogle Scholar
  7. 7.
    A. P. Paiva, P. Malik, J. Radioanal. Nucl. Chem., 261 (2004) 2.CrossRefGoogle Scholar
  8. 8.
    Y. Sasaki, Y. Sugo, S. Suzuki, T. Kimura, Anal. Chim. Acta., 543 (2005) 31.CrossRefGoogle Scholar
  9. 9.
    Y. Sasaki, G. R. Choppin, Anal. Sci., 12(2) (1996) 225.CrossRefGoogle Scholar
  10. 10.
    S. A. Ansari, P. N. Pathak, V. K. Manchanda, M. Husain, A. K. Prasad, V. S. Parmar, Solv. Extr. Ion Exch., 23(4) (2005) 463.CrossRefGoogle Scholar
  11. 11.
    K. Van Hecke, G. Modolo, J. Radioanal. Nucl. Chem., 261 (2004) 269.CrossRefGoogle Scholar
  12. 12.
    R. S. Herbst, J. D. Law, T. A. Todd, V. N. Romanovskiy, V. A. Babain, M. Yu. Alyapyshev, I. V. Smirnov, Separ. Sci. Technol., 41 (2006) 2111.CrossRefGoogle Scholar
  13. 13.
    V. A. Babain, M. Yu. Alyapyshev, R. N. Kiseleva, Radiochim. Acta, 95 (2007) 217.CrossRefGoogle Scholar
  14. 14.
    M. Yu. Alyapyshev, V. A. Babain, I. V. Smirnov, Radiochem. (Radiokhimiya), Engl. Ed. 46 (2004) 270.Google Scholar
  15. 15.
    V. N. Romanovskiy, V. A. Babain, M. Yu. Alyapyshev, Czech. J. Phys., 56 (2006).Google Scholar
  16. 16.
    Y. Pokhitonov, V. Aleksandruk, B. Bibichev, G. Novikov, V. Riazantsev, V. Saprykin, in: Waste Management, WM’02 Conference, Tucson, AZ, February 24–28 (2002).Google Scholar
  17. 17.
    I. A. Demet’ev, A. O. Kozin, Yu. V. Kondrat’ev, D. V. Korol’kov, A. A. Proyavkin, Russ. J. General Chem., 77(5) (2007) 822.CrossRefGoogle Scholar
  18. 18.
    T. Fujii, H. Yamana, M. Watanabe, H. Moriyama, Solvent Extraction And Ion Exchange, 19,1 (2001) 127.CrossRefGoogle Scholar
  19. 19.
    T. Sato, H. Watanabe, H. Suzuki, Hydrometallurgy, 23 (1990) 297.CrossRefGoogle Scholar
  20. 20.
    D. L. Samudralwar, R. B. Lanjewar, A. N. Garg, J. Radioanal. Nucl. Chem., 119 (1987) 211.CrossRefGoogle Scholar
  21. 21.
    A. Kumar, P. K. Mohapatra, P. N. Pathak, V. K. Manchanda, Solvent Extraction and Ion Exchange, 19,3 (2001) 491.CrossRefGoogle Scholar
  22. 22.
    J. G. Bernard, E. Bauer, M. P. Richards, J. B. Arerburnz, R. M. Chamberlin, Radiochim. Acta, 89 (2001) 59.CrossRefGoogle Scholar
  23. 23.
    G. Lumetta, The Problem with Anions in the DOE Complex, in: B. A. Moyer, R. Singh (Eds), Fundamentals and Applications of Anion Separations, Kluwer, New York, 2004.Google Scholar
  24. 24.
    E. S. Nikitskaya, V. S. Usovskaya, M. V. Rubtsov, Zh. Obsch. Khimii, Russian J. General Chem., 28 (1958) 161.Google Scholar
  25. 25.
    E. I. Stiefel, Prog. Inorg. Chem., 22 (1977) 1.CrossRefGoogle Scholar
  26. 26.
    P. Tkac, A. Paulenova, Speciation of Mo(VI) in Aqueous and Organic Phases of Selected Extraction Systems, Separ. Sci. Techn., 45 (2008) accepted.Google Scholar
  27. 27.
    J. J. Cruywagen, J. B. B. Heyns, A. N. Westra, Inorg. Chem., 35(6) (1996) 1556.CrossRefGoogle Scholar
  28. 28.
    J. H. P. Watson, D. C. Ellwood, Nucl. Eng. Design, 226 (2003) 375.CrossRefGoogle Scholar
  29. 29.
    K. Schwochau, Technetium, Chemistry and Radiopharmaceutical Applications, Wiley-VCH, Weinheim, ISBN: 3-527-29496-1, (2000) p. 11.Google Scholar

Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2009

Authors and Affiliations

  • J. L. Lapka
    • 1
  • A. Paulenova
    • 1
  • M. Yu. Alyapyshev
    • 1
    • 2
  • V. A. Babain
    • 2
  • R. S. Herbst
    • 3
  • J. D. Law
    • 3
  1. 1.Oregon State UniversityCorvallisUSA
  2. 2.Khlopin Radium InstituteSt-PetersburgRussia
  3. 3.Idaho National LaboratoryIdaho FallsUSA

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