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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

Abstract

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.

Keywords

Extractor Enrichment Factor Separation Factor Liquid Membrane Malonic Acid 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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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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