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The Use of Partial-Replenishment Tests in Modeling the Leach behavior of Glasses

Published online by Cambridge University Press:  28 February 2011

Aa. Barkatt ,
S. A. Olszowka ,
W. Sousanpour ,
T. Choudhury ,
Y. Guo ,
Al. Barkatt  and
R. Adiga
Aa. Barkatt
Affiliation:
The Catholic University of America, Washington, D.C. 20064
S. A. Olszowka
Affiliation:
The Catholic University of America, Washington, D.C. 20064
W. Sousanpour
Affiliation:
The Catholic University of America, Washington, D.C. 20064
T. Choudhury
Affiliation:
The Catholic University of America, Washington, D.C. 20064
Y. Guo
Affiliation:
The Catholic University of America, Washington, D.C. 20064
Al. Barkatt
Affiliation:
The Catholic University of America, Washington, D.C. 20064
R. Adiga
Affiliation:
The Catholic University of America, Washington, D.C. 20064
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Abstract

The partial-replenishment test can be an important tool in exploring the long-term leach behavior of glasses. In order to demonstrate the use of partial-replenishment test data in modeling, experiments were conducted which show that after a relatively short period test results become largely independent of exchange interval and volume exchange fraction. The results can be characterized by the ratio between these two parameters, which corresponds to the residence time. Sampling of the leachates during a given exchange interval shows that leachate concentrations quickly recover following the exchange, and that this recovery can be satisfactorily described using a simple model based on first-order approach to equilibrium at the silica saturation level.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 212: Symposium P – Scientific Basis for Nuclear Waste Management XIV , 1990 , 133
Copyright
Copyright © Materials Research Society 1991

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References

REFERENCES

[1] Barkatt, Aa., Macedo, P. B., Sousanpour, W., Barkatt, Al., Boroomand, M. A., Fisher, C. F., Shirron, J. J., Szoke, P. and Rogers, V. L., Nucl. Chem. Waste Manage., 4, 153–169 (1983).Google Scholar
[2] Barkatt, Aa., Barkatt, Al., Pehrsson, P. E., Szoke, P. and Macedo, P. B., Nucl. Chem. Waste Manage., 2, 151–164 (1981).Google Scholar
[3] McGrail, B. P., Olson, K. M. and Johnston, J. W., to be published.Google Scholar
[4] Iler, R. K., The Chemistry of Silica, Wiley-Interscience, New York, NY, 1979.Google Scholar