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Environmental Science and Pollution Research

, Volume 20, Issue 12, pp 8629–8635 | Cite as

Investigation of uranium binding forms in selected German mineral waters

  • Alfatih A. A. OsmanEmail author
  • Gerhard Geipel
  • Gert Bernhard
  • Eckhard Worch
Research Article

Abstract

Cryogenic time-resolved laser-induced fluorescence spectroscopy was successfully used to identify uranium binding forms in selected German mineral waters of extremely low uranium concentrations (<2.0 μg/L). The measurements were performed at a low temperature of 153 K. The spectroscopic data showed a prevalence of aquatic species Ca2UO2(CO3)3 in all investigated waters, while other uranyl–carbonate complexes, viz, UO2CO3(aq) and UO2(CO3)2 2−, only existed as minor species. The pH value, alkalinity (CO3 2−), and the main water inorganic constituents, specifically the Ca2+ concentration, showed a clear influence on uranium speciation. Speciation modeling was performed using the most recent thermodynamic data for aqueous complexes of uranium. The modeling results for the main uranium binding form in the investigated waters indicated a good agreement with the spectroscopy measurements.

Keywords

Mineral waters Uranium Cryo-TRLFS Binding forms Thermodynamic modeling 

Notes

Acknowledgments

This work was funded by the German Academic Exchange Service (DAAD). The authors would like to thank C. Eckardt, U. Schaefer, and A. Ritter for providing analytical data of the mineral waters. We are grateful to C. Joseph for helping with EQ3/6 calculations.

Supplementary material

11356_2013_1822_MOESM1_ESM.pdf (57 kb)
Fig. S1 Luminescence decay curves for U(VI) in all investigated mineral waters (PDF 56 kb)
11356_2013_1822_MOESM2_ESM.pdf (32 kb)
Fig. S2 Analysis of individual emission peaks as a function of delay time in a Extalerquelle still water and b Teinacher classic water (PDF 31 kb)
11356_2013_1822_MOESM3_ESM.pdf (18 kb)
Table S1 Some important formation constants for aqueous uranyl complexes used for thermodynamic modeling of mineral waters (PDF 17 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Alfatih A. A. Osman
    • 1
    Email author
  • Gerhard Geipel
    • 1
  • Gert Bernhard
    • 1
  • Eckhard Worch
    • 2
  1. 1.Institute of Resource EcologyHelmholtz-Zentrum Dresden-RossendorfDresdenGermany
  2. 2.Institute of Water ChemistryDresden University of TechnologyDresdenGermany

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