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The Effect of Na-Bearing Thermal Solutions on Ca-Mg-Bentonite Sorption of Sr and Cs

Published online by Cambridge University Press:  15 February 2011

Alexander P. Mukhamet-Galeyev ,
Alexey V. Kudrin ,
Boris S. Nikonov  and
Nadezhda D. Shikina
Alexander P. Mukhamet-Galeyev
Affiliation:
Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetnyi 35, 109017 Moscow, Russia
Alexey V. Kudrin
Affiliation:
Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetnyi 35, 109017 Moscow, Russia
Boris S. Nikonov
Affiliation:
Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetnyi 35, 109017 Moscow, Russia
Nadezhda D. Shikina
Affiliation:
Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetnyi 35, 109017 Moscow, Russia
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Abstract

The sorption of Sr and Cs has been investigated on Ca-Mg-bentonite preliminary treated by 0.1–1.0 m NaCl solutions at 25, 170–250°C during 0.5–7 months. The bentonite remained stable in these conditions. Moreover, hydrothermal treatment has raised the sorption activity of the bentonite. The treated bentonite has shown a strong selectivity for Sr and less pronounced one for Cs. The sorption of the elements increased with temperature and decreased with NaCl content more significant for Sr, than for Cs. The distribution ratio Rd was nearly independent on ion loading for Cs and strongly increased up to 104.5 mL/g in 10−2.0−10−0.5 meq/g ion loading interval for Sr, dropping sharply at more concentrations.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 353: Symposium – Scientific Basis for Nuclear Waste Management XVIII , 1994 , 1053
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

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