Development of an Apparatus for pH-Isolated Electrokinetic In Situ Chemical Oxidation
Publication: Journal of Environmental Engineering
Volume 137, Issue 9
Abstract
An apparatus was designed, manufactured, and implemented to isolate pH during electrokinetic in situ chemical oxidation (EK-ISCO). and electromigration were used to determine the adequacy of the designed apparatus for pH isolation. A series of pH-isolation and normal-mode (no pH-isolation) experiments were undertaken and compared. It was found that pH isolation was achieved when the electrode reservoirs were separated by porous media combined with the purging of the electrode reservoir fluid. The electromigration retardation factor of and was calculated for the porous media using the observed pH breakthrough times. The retardation factor for was also calculated by considering mass flux data. The retardation factors for and were found to be 28.3 and 95, respectively, when using the breakthrough time. The retardation factor for was calculated to be 36.7 using the mass flux data.
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Acknowledgments
Funding for this project was received from ARC grant No. NASALP0776887. Thanks are due to Mark LaGalia, Ming Zhi Wu, and Tim Robertson, all of whom provided input and assistance in the development of this research, and Golder Associates Pty. Ltd., from whom additional funding and support was received.
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Information
Published In
Journal of Environmental Engineering
Volume 137 • Issue 9 • September 2011
Pages: 809 - 816
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Oct 6, 2010
Accepted: Mar 8, 2011
Published online: Mar 10, 2011
Published in print: Sep 1, 2011
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