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Quarterly Journal of Engineering Geology and Hydrogeology
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Quarterly Journal of Engineering Geology and Hydrogeology; 1989; v. 22; issue.3; p. 241-246;
DOI: 10.1144/GSL.QJEG.1989.022.03.08
© 1989 Geological Society of London

Article

The attenuation of the organic component of landfill leachate in the unsaturated zone: a review

J. D. Mather

British Geological Survey, , 64 Gray's Inn Road, London WC1X8NG, UK

Current philosophies for the landfill disposal of wastes are reviewed. A survey of research and operating experience suggests that in some geological environments biodegradation of organic components is occurring within the unsaturated zone whereas little attenuation occurs elsewhere. The most important factor controlling this biodegradation is the buffering capacity of the strata. Aquifers with a significant carbonate content are able to buffer acid leachates favouring the development of microbial populations and leachate attenuation. The lack of buffering capacity within many Permo-Triassic Sandstones maintains acid conditions and limits the development of biodegradation reactions.




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