Coordination of U(IV) and U(VI) sulfate hydrate in aqueous solution

  • Christoph Hennig
  • Satoru Tsushima
  • Vinzenz Brendler
  • Atsushi Ikeda
  • Andreas C. Scheinost
  • Gert Bernhard
Chapter

Abstract

Sulfuric acid has been used for in situ leaching of uranium ores at several places, among them Känigstein/Germany. The fate of the remaining leaching solvents may pose a substantial problem when released into aquifers used for drinking water. The current available thermodynamic data on uranium sulfate species in aqueous solution are not sufficient because typical leaching solutions commonly exceed the limit of ionic strengths of conventional models. The application of spectroscopic techniques may help to provide the missing data. We review here coordination data of U(IV) and U(VI) sulfate in aqueous solutions with high ionic strengths investigated by several spectroscopic techniques (mainly EXAFS) combined with XRD studies and DFT calculations. The observed results expand the current knowledge of uranium sulfates substantially beyond the available information based mainly on thermodynamic data.

Keywords

Density Functional Theory Calculation Bidentate Coordination Sulfate Hydrate Increase Sulfate Concentration Tricapped Trigonal Prism 
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

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Christoph Hennig
    • 1
  • Satoru Tsushima
    • 1
  • Vinzenz Brendler
    • 1
  • Atsushi Ikeda
    • 1
  • Andreas C. Scheinost
    • 1
  • Gert Bernhard
    • 1
  1. 1.Forschungszentrum Dresden-RossendorfInstitute of RadiochemistryDresdenGermany

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