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Journal of Radioanalytical and Nuclear Chemistry

, Volume 267, Issue 1, pp 21–27 | Cite as

Release of coprecipitated uranium from iron oxides

  • C. Noubactep
  • A. Schöner
  • H. Dienemann
  • M. Sauter
Article

Summary

The removal of uranium (VI) from zerovalent iron permeable reactive barriers and wetlands can be explained by its association with iron oxides. The long term stability of immobilized U is yet to be addressed. The present study investigates the remobilization of U(VI) from iron oxides via diverse reaction pathways (acidification, reduction, complex formation). Prior, uranium coprecipitation experiments were conducted under various conditions. The addition of various amounts of a pH-shifting agents (pyrite), an iron complexing agent (EDTA) or iron (III) reduction agent (TiCl3) yielded in uranium remobilization, concentrations above the US EPA allowedmaximum contaminant level(MCL=30 µg/l). This study demonstrates that U(VI) release in nature strongly depends on the conditions and the mechanism of its fixation by geological materials.

Keywords

Oxide Iron EDTA Inorganic Chemistry Uranium 
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/Akadémiai Kiadó 2005

Authors and Affiliations

  • C. Noubactep
    • 1
  • A. Schöner
    • 2
  • H. Dienemann
    • 3
  • M. Sauter
    • 4
  1. 1.Centre of Geosciences - Applied Geology
  2. 2.Institute of Geosciences, Friedrich-Schiller-University
  3. 3.Institute of General Ecology and Environmental Protection of Tharandt
  4. 4.Centre of Geosciences - Applied Geology

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