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Empirical Dissolution Rate Law for the Glass R7T7 Contacting Halite- and Silica-Saturated Brines

Published online by Cambridge University Press:  25 February 2011

B. Grambow ,
W. Lutze  and
R. Müller
B. Grambow
Affiliation:
Kemforschungszentrum Karlsruhe, D7500-Karlsruhe, Postfach 3640, FRG
W. Lutze
Affiliation:
Kemforschungszentrum Karlsruhe, D7500-Karlsruhe, Postfach 3640, FRG
R. Müller
Affiliation:
Kemforschungszentrum Karlsruhe, D7500-Karlsruhe, Postfach 3640, FRG
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Abstract

We report on the time dependence of release of glass constituents during static dissolution experiments with the COGEMA glass R7T7 in saline MgCl2 and NaCl dominated solutions at temperatures between 110 and 190°C. The experiments were performed at high S/V values to ensure silica saturation almost from the start of the tests. The results show a square root of time dependence indicating diffusion as rate-controlling with apparent diffusion coefficients similar to that of water diffusion in alkali silicate, borosilicate glasses or long-term weathered obsidians.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 257: Symposium – Scientific Basis for Nuclear Waste Management XV , 1991 , 143
Copyright
Copyright © Materials Research Society 1992

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References

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