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Czechoslovak Journal of Physics

, Volume 56, Supplement 4, pp D81–D86 | Cite as

Geochemical study of uranium mobility in tertiary argillaceous system at Ruprechtov site, Czech Republic

  • V. Havlová
  • A. Laciok
  • D. Vopálka
  • M. Andrlík
Article
  • 55 Downloads

Abstract

The natural analogue study at the Ruprechtov site is aimed to investigate and understand the behaviour of natural radioelements in plastic clay formation. Uranium is present predominantly in U(+IV) form, either in secondary uranium minerals (uraninite, ningyoite) or in detrital immobile phases (monazite, rhabdophane, xenotime, zircon) and in hardly characterisable non-crystalline forms as well. Process of uranium accumulation probably proceeded via reduction of U(VI) and U(IV) precipitation with involvement of As. Sorption also played important role in U accumulation formation. The sequential extraction experiments were performed in order to specify phases causing uranium retention and accumulation. The isotopic exchange tests with 233U were used to determine the amount of exchangeable uranium. The contradictions in the extraction schema used for the Ruprechtov sediment samples were found. The results prompt careful approach and potential sequential schema modification.

Keywords

Uranium Kaolin Sequential Extraction Sequential Extraction Method Uranium Accumulation 
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.

References

  1. [1]
    Noseck U. et al. In: Uranium in Aquatic Environment (Merkel B. el al. ed.) Springer, Berlin, Heidelberg (2002).Google Scholar
  2. [2]
    Hercík M. Technická a geologická dokumentace vrtných prací. Přírodní analog. Report ÚJV Řež a.s., 2005.Google Scholar
  3. [3]
    Hercík M. Závěrečené shrnutí výsledků projektu Přírodní analog. Report ÚJV Řež a.s., 2005.Google Scholar
  4. [4]
    Breiter K., Knotek M. and Pokorny L Folia Musei Rerum Naturalum Bohemia Occidentalis 33 (1991) 1.Google Scholar
  5. [5]
    Suksi: In: Noseck U. et al. Geochemical behaviour of uranium in a natural argillaceous system at Ruprechtov site. MIGRATION, Avignon, 2005.Google Scholar
  6. [6]
    Denecke M. et al. Env. Sci. Technol. 39 (2005) 2049.CrossRefGoogle Scholar
  7. [7]
    Sulovský P. Mineralogy of Ruprechtov site samples. Expert report. NRI Řež, 2004.Google Scholar
  8. [8]
    Tessier A., Campbell P. G. C. and Bosson M. Anal. Chemistry 51 (1979) 844.CrossRefGoogle Scholar
  9. [9]
    Percival J. B. (1990) Clay mineralogy, geochemistry and partitioning of uranium within the alternative halo of Cigar Lake uranium deposit, Saskatchewan, Canada. Carleton University, Ottawa, PhD Thesis.Google Scholar
  10. [10]
    Sachs S. et al. FZKA 6969, Wissenschaft Berichte (Buckau G., ed.) Research Centre Karslruhe, Karlsruhe 2004, 79.Google Scholar

Copyright information

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

Authors and Affiliations

  • V. Havlová
    • 1
  • A. Laciok
    • 1
  • D. Vopálka
    • 2
  • M. Andrlík
    • 2
  1. 1.Nuclear Research Institute Řež plc.Řež near PragueCzech Republic
  2. 2.Faculty of Nuclear Sciences and Physical EngineeringCzech Technical UniversityPrague 1Czech Republic

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