National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

Actinyl(VI) Speciation in Concentrated Sodium Chloride Solutions.

DE2001763298

Publication Date	2000
Personal Author	Runde, W.; Neu, M.
Page Count	12
Abstract	Thermodynamic parameters and sorption coefficients provide the fundamental database for the mathematical abstraction of environmental transport of actinides. We have been investigating the chemistry of the hexavalent actinides, U and Pu, in the solid state in concentrated salt (NaCl) solutions representative of conditions within geologic salt formations, sites for nuclear waste disposal. Chloride complexation is proven to play an important role for actinyl(VI) volubility and speciation. We investigated U(VI) and Pu(VI) equilibria with the predominant inorganic ligands hydroxide and carbonate in the presence of chloride. We used a number of spectroscopic techniques (UV-vis-NIR, Raman, FTIR, NMR, XAS) and Xray diffraction to characterize solution species and solid phases as a function of pH, carbonate concentration, and ionic strength.
Keywords	Sodium chlorides Evaluation Aqueous solutions Actinide compounds Thermodynamics Radioactive waste disposal Actinides Ligands Environmental transport
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	77G - Radioactive Wastes & Radioactivity 68F - Radiation Pollution & Control
Corporate Authors	Los Alamos National Lab., NM.; Department of Energy, Washington, DC.
Document Type	Conference Proceedings
NTIS Issue Number	200123
Contract Number	W-7405-ENG-36

Actinyl(VI) Speciation in Concentrated Sodium Chloride Solutions.

Actinyl(VI) Speciation in Concentrated Sodium Chloride Solutions.
DE2001763298

Publication Date	2000
Personal Author	Runde, W.; Neu, M.
Page Count	12
Abstract	Thermodynamic parameters and sorption coefficients provide the fundamental database for the mathematical abstraction of environmental transport of actinides. We have been investigating the chemistry of the hexavalent actinides, U and Pu, in the solid state in concentrated salt (NaCl) solutions representative of conditions within geologic salt formations, sites for nuclear waste disposal. Chloride complexation is proven to play an important role for actinyl(VI) volubility and speciation. We investigated U(VI) and Pu(VI) equilibria with the predominant inorganic ligands hydroxide and carbonate in the presence of chloride. We used a number of spectroscopic techniques (UV-vis-NIR, Raman, FTIR, NMR, XAS) and Xray diffraction to characterize solution species and solid phases as a function of pH, carbonate concentration, and ionic strength.
Keywords	Sodium chlorides Evaluation Aqueous solutions Actinide compounds Thermodynamics Radioactive waste disposal Actinides Ligands Environmental transport
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	77G - Radioactive Wastes & Radioactivity 68F - Radiation Pollution & Control
Corporate Authors	Los Alamos National Lab., NM.; Department of Energy, Washington, DC.
Document Type	Conference Proceedings
NTIS Issue Number	200123
Contract Number	W-7405-ENG-36