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Elements; April 2009; v. 5; no. 2; p. 105-110; DOI: 10.2113/gselements.5.2.105
© 2009 Mineralogical Society of America
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Bentonite Clay Keeps Pollutants at Bay

Will P. Gates1, Abdelmalek Bouazza1 and G. Jock Churchman2

1 Department of Civil Engineering, Monash University
Melbourne, Australia
E-mail: gateswp{at}smectech.com.au; malek.bouazza{at}eng.monash.edu.au
2 School of Earth and Environmental Sciences
University of Adelaide, Adelaide, Australia
E-mail: jock.churchman{at}adelaide.edu.au

Increasingly stringent regulation of pollution and waste production worldwide drives the need to isolate contaminants that pose a threat to human and environmental health by using engineered barrier systems. The relatively low cost and wide versatility of reactive barriers favour the use of bentonite as an important component in barrier systems. Current research aims to optimise the performance of bentonite-based barriers under the effects of coupled thermal, mechanical, hydraulic and chemical stresses, for a wide range of pollutants and over long time periods - tens of thousands of years in the case of nuclear waste.

KEYWORDS: engineered barrier, fluid, waste, radioactive waste, bentonite, smectite, clay




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