Czechoslovak Journal of Physics

, Volume 56, Issue 1, pp D445–D451 | Cite as

Oscillatory extraction — New method of similar elements and isotopes separation

  • M. A. Afonin
  • A. A. Kopyrin
  • K. Moody
Separation Methods, Speciation


The new separation extraction method was created based on oscillatory extraction/stripping process in two extractors coupled by bulk liquid membrane (LM). The experimental setup to investigate the kinetics of non-stationary processes was built in Saint Petersburg State Institute of Technology in the Rare Earth Department. To induce the oscillatory extraction-stripping process the cyclic Belousov-Zhabotinsky (BZ) reaction or cyclic electrochemical oxidation-reduction was used. The possibility to use oscillatory extraction approach to separate similar elements by using the differences in their kinetic properties is demonstrated. The experimental evidences of uranium, cerium and neodymium isotopes separation were obtained. The separation of 142Ce and 140Ce isotopes between aqueous phases of two extractors coupled by bulk LM in the experiments with cyclic chemical oxidation/reduction with enrichment factor about 2.5% was observed. Under the same conditions the separation of the Nd isotopes (heavy isotopes of Nd — 144Nd, 145Nd, 146Nd, 148Nd, and 150Nd from the light isotope — 143Nd) in the same experiment with enrichment factor about 0.7–1.4% was observed.


Extractor Enrichment Factor Separation Factor Liquid Membrane Malonic Acid 
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  1. [1]
    Kizim N. F. and Lar’kov A. P.: In: Abstracts of presented papers of 2-nd International Symposium The Problems Of Complex Ores Utilization May 19–24, 1996, State Mining Institute, Saint-Petersburg, Russia, p. 306–307 (in Russian)Google Scholar
  2. [2]
    Kubota F. et al.: Sep. Sci. and Tech. 30, No. 5, (1995) 777.CrossRefGoogle Scholar
  3. [3]
    Otawara K. and Fan L. T.: Computers & Chemical Engineering 2, No 2–3 (2001) 333.CrossRefGoogle Scholar
  4. [4]
    Afonin M. A. and Komarov E. V.: Doklady AN SSSR 307 (1989) 388 (in Russian).Google Scholar
  5. [5]
    Afonin M. A., Smirnov A. V., Sedov V. M.: Radiokhimia, 35, No.4 (1993) 121 (in Russian).Google Scholar
  6. [6]
    Afonin M. A., Smirnov A. V.: Radiokhimia, 35, No.6 (1993) 72 (in Russian).Google Scholar
  7. [7]
    Smirnov A. V., Afonin M. A., Sedov V. M.: Radiokhimia 36, No.3 (1994) 256 (in Russian).Google Scholar
  8. [8]
    Afonin M. A., Romanovskij V. V., Scherbakov V. A.: Solv. Ext. and Ion Exch. 16, No 5 (1998) 1215.CrossRefGoogle Scholar
  9. [9]
    Moller A. C. and Olsen L. F.: J. Am. Chem. Soc. 121 (1999) 6351.CrossRefGoogle Scholar
  10. [10]
    Eichwald C. and Walleczek J.: Biophysical Chemistry 74 (1998) 209.CrossRefGoogle Scholar
  11. [11]
    Hjelmfelt A. and Ross J.: J. Phys. Chem. B, 102 (1998) 3441.CrossRefGoogle Scholar
  12. [12]
    Ivakhno S. U., Urtov E. V.: Membrane Extraction. Itogi Nauki I tekhniki. Ser. Neorg. Khimija 18 (1990) 176 pp. (in Russian).Google Scholar
  13. [13]
    Lev A. A.: Ionnaja Izbiratel’nost’ Kletochnykh Membran (Ionic selectivity of cellular membranes), L. Nauka, 1975, 324 pp. (In Russian)Google Scholar
  14. [14]
    Demirel Y. and Sandler S. I.: Biophysical Chemistry 97, No. 2–3 (2002 87.CrossRefGoogle Scholar
  15. [15]
    Mitchell J. Herbel et al.: Geochimica et Cosmochimica Acta 64 (2000) 3701.CrossRefADSGoogle Scholar

Copyright information

© Institute of Physics, Academy of Sciences of the Czech Republic 2006

Authors and Affiliations

  • M. A. Afonin
    • 1
  • A. A. Kopyrin
    • 1
  • K. Moody
    • 2
  1. 1.Saint-Petersburg Institute of TechnologySaint-PetersburgRussia
  2. 2.Lawrence Livermore National LaboratoryLivermoreUSA

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