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Application of Thermodynamic Sorption Models to Distribution Coefficients of Radionuclides in Bentonite

Published online by Cambridge University Press:  10 February 2011

M. Ochs ,
B. Lothenbach  and
M. Yui
M. Ochs
Affiliation:
BMG Engineering Ltd, Ifangstrasse 11, CH-8952 Ziirich-Schlieren, Switzerland
B. Lothenbach
Affiliation:
BMG Engineering Ltd, Ifangstrasse 11, CH-8952 Ziirich-Schlieren, Switzerland
M. Yui
Affiliation:
Power Reactor and Nuclear Fuel Development Corporation, Tokai-mura, 319-11Japan
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Abstract

The application of thermodynamic models to calculate Kd values for Sr/Ra and Pb on bentonite is demonstrated. The model discussed here can be used to identify relevant sorption processes, as well as other factors that determine Kd values, such as impurities contained in bentonite or artifacts (precipitation); i.e. it can be used to conduct sensitivity analyses of Kd values. Kd values can be modeled over a very wide range, indicating that such models may also be used for an evaluation of experimental data, and for predictive purposes where no such data are available.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 506: Symposium – Scientific Basis for Nuclear Waste Management XXI , 1997 , 765
Copyright
Copyright © Materials Research Society 1998

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