Cosolvent-Enhanced Electrokinetic Remediation of Soils Contaminated with Phenanthrene
Publication: Journal of Environmental Engineering
Volume 126, Issue 6
Abstract
This research was carried out to evaluate feasibility of using an electrokinetic technique to remove hydrophobic organic pollutants from soils, with the assistance of a cosolvent (n-butylamine, tetrahydrofuran, or acetone) added to the conducting fluid. The experiments were carried out on glacial till clay with phenanthrene as the test compound. Desorption equilibrium was investigated by batch tests. The electrokinetic experiments were conducted using a 19.1 cm long × 6.2 cm inside diameter column under controlled voltage. Water or 20% (volume) cosolvent solution was constantly supplied at the anode. The concentration of phenanthrene in the effluent collected at the cathode was monitored. Each experiment lasted for 100 to 145 days. Results showed that the presence of n-butylamine significantly enhanced the desorption and electrokinetic transport of phenanthrene; about 43% of the phenanthrene was removed after 127 days or 9 pore volumes. The effect of acetone was not as significant as butylamine. The effluent flow in the tetrahydrofuran experiments was minimal, and phenanthrene was not detected in the effluent. The use of water as the conducting solution did not cause observable phenanthrene migration.
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References
1.
Acar, Y. B., and Alshawabkeh, A. N. (1993). “Principles of electrokinetic remediation.” Envir. Sci. and Technol., 27(13), 2638–2647.
2.
Acar, Y. B., Li, H., and Gale, R. J. (1992). “Phenol removal from kaolinite by electrokinetics.” J. Geotech. Eng., 118(11), 1837–1852.
3.
Bruell, C. J., Segal, B. A., and Walsh, M. T. (1992). “Electroosmotic removal of gasoline hydrocarbons and TCE from clay.”J. Envir. Engrg., ASCE, 118(1), 68–83.
4.
Eykholt, G. R., and Daniel, D. E. (1994). “Impact of system chemistry on electroosmosis in contaminated soil.”J. Geotech. Engrg., ASCE, 120(5), 797–815.
5.
Ho, S. V., Athmer, C. J., Heitkamp, M. A., and Brackin, J. M. (1995). “Integrated in situ soil remediation technology: The Lasagna process.” Envir. Sci. and Technol., 29(10), 2528–2534.
6.
Li, A., and Yalkowsky, S. H. (1998a). “Predicting cosolvency. I: Solubility ratio and solute log Kow.” Industrial and Engrg. Chem. Res., 37(11), 4470–4475.
7.
Li, A., and Yalkowsky, S. H. (1998b). “Predicting cosolvency. II: Correlation with solvent physicochemical properties.” Industrial Engrg. Chem. Res., 37(11), 4476–4480.
8.
Logan, B. E. (1998). Environ. Transport Processes, Wiley, New York.
9.
MacDonald, J. A., and Rao, P. S. (1997). “Shift needed to improve market for innovative technologies.” Soil and Groundwater Cleanups, August/September, 19–25.
10.
Mitchell, J. K. (1992). Fundamentals of Soil Behavior, 2nd Ed., Wiley, New York.
11.
Peters, C. A., and Luthy, R. G. (1993). “Coal tar dissolution in water-miscible solvents: Experimental evaluation.” Envir. Sci. and Technol., 27, 2831–2843.
12.
Rao, P. S. C., Lee, L. S., and Wood, A. L. (1991). “Solubility, sorption and transport of hydrophobic organic chemicals in complex mixtures.” Rep. EPA/600/M-91/009, Environmental Protection Agency, Washington, D.C.
13.
Reddy, K. R., Parupudi, U. S., Devulapalli, S. N., and Xu, C. Y. (1997). “Effects of soil composition on the removal of chromium by electrokinetics.” J. Haz. Mat., 55, 135–158.
14.
Reddy, K. R., and Parupudi, U. S. (1997). “Removal of chromium, nickel and cadmium from clays by in-situ electrokinetic remediation.” J. Soil Contamination, 6(4), 391–407.
15.
Reddy, K. R., and Shirani, A. B. (1997). “Electrokinetic remediation of metal contaminated glacial tills.” Geotech. Geological Engrg., London, 15, 3–29.
16.
Schwarzenbach, R. P., Gschwend, P. M., and Imboden, D. M. ( 1993). Chapter 11: “Sorption: Solid-Aqueous Solution Exchange.” Envir. Organic Chem., Wiley, New York, 255–341.
17.
U.S. Environmental Protection Agency (USEPA). (1995). “In situ remediation technology status report: Cosolvents.” Rep. EPA 542-K-94-006, Washington, D.C.
Information & Authors
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Published In
Journal of Environmental Engineering
Volume 126 • Issue 6 • June 2000
Pages: 527 - 533
History
Received: Apr 13, 1999
Published online: Jun 1, 2000
Published in print: Jun 2000
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