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Effects of Microorganisms Growth on the Long-Term Stability of Cement and Bitumen

Published online by Cambridge University Press:  01 January 1992

Marie F. Libert ,
R. Sellier ,
G. Jouquet ,
M. Trescinski  and
H. Spor
Marie F. Libert
Affiliation:
Department of waste management and disposal, Nuclear Research Center of Cadarache, 13108 St Paul Lez Durance Cedex, FRANCE
R. Sellier
Affiliation:
Department of waste management and disposal, Nuclear Research Center of Cadarache, 13108 St Paul Lez Durance Cedex, FRANCE
G. Jouquet
Affiliation:
Department of waste management and disposal, Nuclear Research Center of Cadarache, 13108 St Paul Lez Durance Cedex, FRANCE
M. Trescinski
Affiliation:
Department of waste management and disposal, Nuclear Research Center of Cadarache, 13108 St Paul Lez Durance Cedex, FRANCE
H. Spor
Affiliation:
Department of waste management and disposal, Nuclear Research Center of Cadarache, 13108 St Paul Lez Durance Cedex, FRANCE
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Abstract

Cement is used as a coating matrix for nuclear waste or as an engineered barrier of waste repositories situated in geological formations.

The effect of mineral acids excreted by bacteria (Thiobacillus) or organic acids produced by fungi, on the biodegradation of cement is discussed. Organic acids are quantitatively and qualitatively determined during growth of fungi over a two-year period. Even with high pH conditions, pH of the cement ≈ 11, growth of microorganisms occurs.

Biodeterioration of cement is expressed in terms of bioleaching velocity of calcium and is observed by electron microscopy.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 294: Symposium V – Scientific Basis for Nuclear Waste Management XVI , 1992 , 267
Copyright
Copyright © Materials Research Society 1993

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References

REFERENCES

1. Bachofen, R., Experentia 47 (6), 583–585 (1991).Google Scholar
2. Ait-Langomazino, N., Sellier, R., Jouquet, G. and Trescinski, M., Experentia 47 (6), 507–640 (1991).Google Scholar