Fundamental chemistry of cesium extraction from acidic media by HCCD in FS-13

R. Scott Herbst; Dean Peterman; Richard D. Tillotson; Laetitia H. Delmau

doi:10.1080/07366290801925298

Fundamental chemistry of cesium extraction from acidic media by HCCD in FS-13

R. Scott Herbst, Dean Peterman, Richard D. Tillotson, Laetitia H. Delmau

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Abstract

We previously published a model for cesium extraction from acidic media by the protonated form of the hexachlorinated derivative of the chloro-protected cobalt bis(dicarbollide), HCCD, dissolved in trifluoromethylphenyl sulfone, FS-13. The model indicated that Cs extraction proceeds through a series of ion-paired and/or dissociated extraction equilibria. Additional Cs distribution ratio data has been obtained and the model refined and simplified. It is demonstrated that the equilibrium exclusively involving the exchange of proton for cesium by formation of ion-paired CsCCD models the Cs distribution data very well, particularly for the concentrations of HCCD greater than ∼0.0005 M (0.5 mM). Finally, activity corrections for the aqueous phase to the Cs distribution data results in good agreement to the theoretical value of -1 for slope (log-log) analysis of the data over a wide range of HNO₃ and HCCD concentrations.

Original language	English
Pages (from-to)	163-174
Number of pages	12
Journal	Solvent Extraction and Ion Exchange
Volume	26
Issue number	2
DOIs	https://doi.org/10.1080/07366290801925298
State	Published - Mar 2008

Funding

This research was sponsored by the Laboratory Directed Research and Development Program, U.S. Department of Energy under DOE Idaho Operations Office contract DE-AC07-05ID14517 with the Idaho National Laboratory, managed by Battelle Energy Alliance, LLC.

Funders	Funder number
Battelle Energy Alliance
U.S. Department of Energy	DE-AC07-05ID14517
Laboratory Directed Research and Development
Idaho National Laboratory

Keywords

Cesium
Cesium extraction
Chlorinated cobalt dicarbollide
Extraction
Slope analysis
Trifluoromethylphenyl sulfone

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10.1080/07366290801925298

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abstract = "We previously published a model for cesium extraction from acidic media by the protonated form of the hexachlorinated derivative of the chloro-protected cobalt bis(dicarbollide), HCCD, dissolved in trifluoromethylphenyl sulfone, FS-13. The model indicated that Cs extraction proceeds through a series of ion-paired and/or dissociated extraction equilibria. Additional Cs distribution ratio data has been obtained and the model refined and simplified. It is demonstrated that the equilibrium exclusively involving the exchange of proton for cesium by formation of ion-paired CsCCD models the Cs distribution data very well, particularly for the concentrations of HCCD greater than ∼0.0005 M (0.5 mM). Finally, activity corrections for the aqueous phase to the Cs distribution data results in good agreement to the theoretical value of -1 for slope (log-log) analysis of the data over a wide range of HNO3 and HCCD concentrations.",

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AU - Peterman, Dean

AU - Tillotson, Richard D.

AU - Delmau, Laetitia H.

PY - 2008/3

Y1 - 2008/3

N2 - We previously published a model for cesium extraction from acidic media by the protonated form of the hexachlorinated derivative of the chloro-protected cobalt bis(dicarbollide), HCCD, dissolved in trifluoromethylphenyl sulfone, FS-13. The model indicated that Cs extraction proceeds through a series of ion-paired and/or dissociated extraction equilibria. Additional Cs distribution ratio data has been obtained and the model refined and simplified. It is demonstrated that the equilibrium exclusively involving the exchange of proton for cesium by formation of ion-paired CsCCD models the Cs distribution data very well, particularly for the concentrations of HCCD greater than ∼0.0005 M (0.5 mM). Finally, activity corrections for the aqueous phase to the Cs distribution data results in good agreement to the theoretical value of -1 for slope (log-log) analysis of the data over a wide range of HNO3 and HCCD concentrations.

AB - We previously published a model for cesium extraction from acidic media by the protonated form of the hexachlorinated derivative of the chloro-protected cobalt bis(dicarbollide), HCCD, dissolved in trifluoromethylphenyl sulfone, FS-13. The model indicated that Cs extraction proceeds through a series of ion-paired and/or dissociated extraction equilibria. Additional Cs distribution ratio data has been obtained and the model refined and simplified. It is demonstrated that the equilibrium exclusively involving the exchange of proton for cesium by formation of ion-paired CsCCD models the Cs distribution data very well, particularly for the concentrations of HCCD greater than ∼0.0005 M (0.5 mM). Finally, activity corrections for the aqueous phase to the Cs distribution data results in good agreement to the theoretical value of -1 for slope (log-log) analysis of the data over a wide range of HNO3 and HCCD concentrations.

KW - Cesium

KW - Cesium extraction

KW - Chlorinated cobalt dicarbollide

KW - Extraction

KW - Slope analysis

KW - Trifluoromethylphenyl sulfone

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Fundamental chemistry of cesium extraction from acidic media by HCCD in FS-13

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