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Leach Rate Excursions in Borosilicate Glasses: Effects of Glass and Leachant Composition

Published online by Cambridge University Press:  28 February 2011

Aa. Barkatt ,
S. A. Olszowka ,
W. Sousanpour ,
M. A. Adel-Hadadi ,
R. Adiga ,
Al. Barkatt ,
G. S. Marbury  and
S. Li
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
M. A. Adel-Hadadi
Affiliation:
The Catholic University of America, Washington, D.C. 20064
R. Adiga
Affiliation:
The Catholic University of America, Washington, D.C. 20064
Al. Barkatt
Affiliation:
The Catholic University of America, Washington, D.C. 20064
G. S. Marbury
Affiliation:
The Catholic University of America, Washington, D.C. 20064
S. Li
Affiliation:
The Catholic University of America, Washington, D.C. 20064
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Abstract

Leach tests on borosilicate glasses using a partial-replenishment technique show that in certain cases large excursions in leach rate may appear at the end of periods ranging between 1 and 20 months. The extent and time of these leach rate transients are very sensitive to glass and leachant composition and to S/V ratio, and they may be eliminated by slight increases in Si and Al levels in the glass or by using a neutrally buffered leachant. This phenomenon, which may reflect cracking of the initial surface layer, can have a considerable effect on the results and complicate the modeling of leach tests which strongly reflect the extent of leaching during the early stages of glass/leachant interaction. However, these effects appear to have relatively little significance in the long term.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 212: Symposium P – Scientific Basis for Nuclear Waste Management XIV , 1990 , 65
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] Eisenstatt, L. R., Chapman, C. C. and Bogart, R. L., in Waste Management ‘86, eds. Post, R. G. and Wacks, M. E., University of Arizona Board of Regents, Tucson, AZ, 1986, Vol. 2, pp. 513–519.Google Scholar
[3] Shelby, J. E. and Vitko, J. Jr., J. Non-Cryst. Solids, 38–39. 631–636 (1980).CrossRefGoogle Scholar
[4] Lanza, F. and Parnisari, E., Proc. Int. Symp. Ceramics in Nuclear Waste Management, Cincinnati, Ohio, April 1979, CONF-790420, Technical Information Center, U. S. Department of Energy, 1979, pp. 238–242.Google Scholar
[5] Simmons, J. H., Barkatt, Aa. and Macedo, P. B., Nucl. Tech., 56, 265–270 (1982).CrossRefGoogle Scholar
[6] Grambow, B., in Scientific Basis for Nuclear Waste Management VUI, eds. Jantzen, C. M., Stone, J. A. and Ewing, R. C., Materials Research Society, Pittsburgh, PA, 1985, pp. 15–23.Google Scholar
[7] Freude, E., Grambow, B., Lutze, W., Rabe, H. and Ewing, R. C., in Scientific Basis for Nuclear Waste Management VIII, eds. Jantzen, C. M., Stone, J. A. and Ewing, R. C., Materials Research Society, Pittsburgh, PA, 1985, pp. 99–106.Google Scholar
[8] Charles, R. J., J. Appl. Phys., 29, 1549–1553 (1958).CrossRefGoogle Scholar
[9] Jantzen, C. M. and Plodinec, M. J., J. Non-Cryst. Solids, 67, 207–223 (1984).Google Scholar
[10] Barkatt, Aa., Macedo, P. B., Sousanpour, W., Barkatt, Al., Boroomand, M. A., Rogers, V. L., Nazari, A., Pimenov, G. and Shirron, J. J., in Waste Management ‘84, eds. Post, R. G. and Wacks, M. E., University of Arizona Board of Regents, Tucson, AZ, 1984, pp. 627–631.Google Scholar