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Understanding the Chemistry of the Actinides in High Level Waste Tank Systems: The Impact of Temperature on Hydrolysis and Complexation with Organics.


DE2005839455

Publication Date 2005
Personal Author Wood, S. A.
Page Count 16
Abstract The solubility of CeO2 and ThO2 in aqueous NaNO3 solutions was studied as a function of pH and ionic strength, and the concentration of the organic ligands: citrate, EDTA, and oxalate. The main findings of the study are that these organic ligands increase the solubility of CeO2 markedly via the formation of complexes. On the other hand, the solubility of ThO2 was not affected by the presence of these ligands at levels of several hundred micromolar. These results have implications for the behavior of Pu(IV), for which Ce(IV) and Th(IV) are analogues.
Keywords
  • High level radioactive wastes
  • Actinides
  • Chemistry
  • Ligands
  • Temperature
  • Hydrolysis
  • Tanks
  • Wastes
  • Solubility
  • Cerium
  • Thorium
  • pH
  • Ionic reactions
Source Agency
  • Technical Information Center Oak Ridge Tennessee
Corporate Authors Idaho Univ., Moscow.; Department of Energy, Washington, DC.
Supplemental Notes Sponsored by Department of Energy, Washington, DC.
Document Type Technical Report
NTIS Issue Number 200603
Understanding the Chemistry of the Actinides in High Level Waste Tank Systems: The Impact of Temperature on Hydrolysis and Complexation with Organics.
Understanding the Chemistry of the Actinides in High Level Waste Tank Systems: The Impact of Temperature on Hydrolysis and Complexation with Organics.
DE2005839455

  • High level radioactive wastes
  • Actinides
  • Chemistry
  • Ligands
  • Temperature
  • Hydrolysis
  • Tanks
  • Wastes
  • Solubility
  • Cerium
  • Thorium
  • pH
  • Ionic reactions
  • Technical Information Center Oak Ridge Tennessee
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