Removal of Hexachlorobenzene from Kaolin by Electrokinetics Coupled with PRB
Publication: Journal of Hazardous, Toxic, and Radioactive Waste
Volume 15, Issue 3
Abstract
This study deals with the remediation of clayed soils contaminated with hydrophobic organic compounds (HOCs) by using electrokinetics (EK) coupled with a permeable reactive barrier (PRB) technique. Hexachlorobenzene (HCB) and kaolin were selected as the typical HOCs and clay, respectively, and microscale particles were synthesized as the functional materials of PRB. Furthermore, Triton X-100 was used as the solubility-enhanced agent to promote the movement and removal of contaminants. Four bench-scale EK tests were conducted with or without PRB. The results reveal that coupling EK with PRB greatly promoted the overall removal of HCB from soil, compared with EK alone. Other than the electroosmotic flow, the adsorption/reductive degradation by PRB may also be responsible for the HCB removal (over 82% of HCB passing by the PRB was removed). Our investigation suggests that the integration of EK and PRB is of great promise to promote the application of EK technique in the remediation of HOC-contaminated soils.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (Grants NNSFC20777024 and NNSFC40801114).
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Published In
Journal of Hazardous, Toxic, and Radioactive Waste
Volume 15 • Issue 3 • July 2011
Pages: 175 - 179
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Feb 26, 2010
Accepted: Jul 23, 2010
Published online: Jul 26, 2010
Published in print: Jul 1, 2011
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