Removal of Hexachlorobenzene and Phenanthrene from Clayey Soil by Surfactant- and Ultrasound-Assisted Electrokinetics
Publication: Journal of Environmental Engineering
Volume 136, Issue 7
Abstract
Removal of nonpolar contaminants such as most organic compounds are transported primarily by electroosmosis in electrokinetic remediation, thus the process is effective only if the contaminants are soluble in pore fluid. Hydrophobic organic compounds such as hexachlorobenzene (HCB) and phenanthrene (PHE) can adsorb strongly to clayey soil. Therefore, in this study, enhancements were done by adding 2-hydroxylpropyl- -cyclodextrin surfactant and ultrasonication comparably to assist the electrokinetic treatment in improving the mobility of these hydrophobic compounds. The results show that HCB and PHE were mobilized and removed in both cases. But HCB is more difficult to remove than PHE, because of its highly stable nature and low water-solubility property. Ultrasound-assisted test performed better PHE reduction than surfactant-assisted test, because ultrasound can degrade the contaminant through oxidation by free radicals.
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Acknowledgments
The writers would like to thank the Maj and Tor Nessling Foundation, Helsinki, Finland, for their financial support in this research.
References
Chung, H. I., and Kamon, M. (2005). “Ultrasonically enhanced electrokinetic remediation for removal of Pb and phenanthrene in contaminated soils.” Eng. Geol. (Amsterdam), 77, 233–242.
Jiradecha, C., Urgun-Demirtas, M., and Pagilla, K. (2006). “Enhanced electrokinetic dissolution of naphthalene and 2,4-DNT from contaminated soils.” J. Hazard. Mater., 136, 61–67.
Kommalapati, R. R., Valsaraj, K. T., Constant, W. D., and Roy, D. (1997). “Aqueous solubility enhancement and desorption of hexachlorobenzene from soil using a plant-based surfactant.” Water Res., 31, 2161–2170.
Maturi, K., and Reddy, K. R. (2006). “Simultaneous removal of organic compounds an heavy metals from soils by electrokinetic remediation with a modified cyclodextrin.” Chemosphere, 63(6), 1022–1031.
Pamukcu, S., and Huang, C. P. (2001). “In-situ remediation of contaminated soils by electrokinetic processes.” Hazardous and radioactive waste treatment technologies handbook, C. H. Oh, ed., CRC, Boca Raton, Fla.
Park, J. -Y., Lee, H. -H., Kim, S. -J., Lee, Y. -J., and Yang, J. -W. (2007). “Surfactant-enhanced electrokinetic removal of phenanthrene from kaolinite.” J. Hazard. Mater., 140, 230–236.
Reddy, K. R., and Saichek, R. E., (2002). “Electrokinetic removal of phenanthrene from kaolin using different surfactants and cosolvents.” ASTM Special Technical Publication 1415, evaluation and remediation of low permeability and dual porosity environments, ASTM, West Conshohocken, Pa., 138–161.
Saichek, R. E., and Reddy, K. R. (2003). “Effect of pH control at the anode for the electrokinetic removal of phenanthrene from kaolin soil.” Chemosphere, 51(4), 273–287.
Saichek, R. E., and Reddy, K. R. (2005). “Electrokinetically enhanced remediation of hydrophobic organic compounds in soils: A review.” Environ. Sci. Technol., 35, 115–192.
Yuan, S., Shu, Z., Wan, J., and Lu, X. (2007). “Enhanced desorption of hexachlorobenzene from kaolin by single and mixed surfactants.” J. Colloid Interface Sci., 314, 167–175.
Yuan, S., Tian, M., and Lu, X. (2006). “Electrokinetic movement of hexachlorobenzene in clayed soils enhanced by Tween 80 and -cyclodextrin.” J. Hazard. Mater., 137(2), 1218–1225.
Zhou, W., and Zhu, L. (2007). “Enhanced desorption of phenanthrene from contaminated soil using anionic/nonionic mixed surfactant.” Environ. Pollut., 147, 350–357.
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© 2010 ASCE.
History
Received: Apr 2, 2008
Accepted: Dec 11, 2008
Published online: Dec 2, 2009
Published in print: Jul 2010
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