Benzene, Toluene, Ethylbenzene, m&p-Xylene, o-Xylene Diffusion and Sorption for a Geosynthetic Clay Liner at Two Temperatures
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 131, Issue 10
Abstract
The diffusion and sorption characteristics of a geosynthetic clay liner (GCL) are examined for a group of volatile aromatic hydrocarbons: benzene, toluene, ethylbenzene, m&p-xylene, and o-xylene (BTEX) at two different temperatures. It is shown that geotextile component of a GCL contributes to the sorption of hydrocarbons by the GCL. While the partitioning coefficients of the BTEX compounds have the order m&p-xylene , the diffusion coefficients have the order . The reduction in diffusion and sorption coefficients with decreasing temperature have opposite effects in terms of the rate of contaminant movement through a GCL. However, it is shown that the decrease in transport due to a reduced diffusion coefficient dominates and mass transport is reduced at lower temperature.
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Acknowledgments
The study was financially supported by the Canadian Department of National Defense. The writers are grateful to Dr. R. J. Bathurst of GeoEngineering Centre Queen’s–RMC, Royal Military College, Canada, Dr. K. Badv of Department of Civil Engineering, Urmia University, Iran, and Mr. Paul Hurst of Department of Civil Engineering, Queen’s University, Canada for their contribution to this project. They also appreciate the thorough review and thoughtful comments of the anonymous reviewers.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 131 • Issue 10 • October 2005
Pages: 1211 - 1221
Copyright
© 2005 ASCE.
History
Received: Jun 6, 2003
Accepted: Feb 27, 2005
Published online: Oct 1, 2005
Published in print: Oct 2005
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