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Role of Surface Layers in the Leaching Behavior of Glass

Published online by Cambridge University Press:  21 February 2011

B.K. Zoitos  and
D.E. Clark
B.K. Zoitos
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611
D.E. Clark
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611
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Abstract

Results are presented from a two-year dynamic leach test of nuclear waste glass under conditions designed to simulate those of the Stripa granite repository. Solution and surface analytical techniques were used to assess the glass leach rate as well as surface composition and morphology. Glass leach rates were observed to decrease by a factor of two during the first six months. This effect is attributed to the formation of a protective surface layer. Analysis of this layer shows it to be rich in silicon and iron and depleted in lithium, sodium and boron. It was also found that the layer is subject to dissolution.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 125: Symposium N – Materials Stability and Environmental Degradation , 1988 , 169
Copyright
Copyright © Materials Research Society 1988

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References

REFERENCES

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