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Electroremediation of Cu-Contaminated Soil

Authors: Darius Jay R. Bongay, Roberto L. Ngo

Abstract:

This study investigated the removal efficiency of electrokinetic remediation of copper-contaminated soil at different combinations of enhancement reagents used as anolyte and catholyte. Sodium hydroxide (at 0.1, 0.5, and 1.0 M concentrations) and distilled water were used as anolyte, while lactic acid (at 0.01, 0.1, and 0.5 M concentrations), ammonium citrate (also at 0.01, 0.1, and 0.5 M concentrations) and distilled water were used as catholyte. A continuous voltage application (1.0 VDC/cm) was employed for 240 hours for each experiment. The copper content of the catholyte was determined at the end of the 240-hour period. Optimization was carried out with a Response Surface Methodology - Optimal Design, including F test, and multiple comparison method, to determine which pair of anolyte-catholyte was the most significant for the removal efficiency. "1.0 M NaOH" was found to be the most significant anolyte while it was established that lactic acid was the most significant type of catholyte to be used for the most successful electrokinetic experiments. Concentrations of lactic acid should be at the range of 0.1 M to 0.5 M to achieve maximum percent removal values.

Keywords: Electrokinetic remediation, copper contamination, heavy metal contamination, soil remediation

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1076826

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References:


[1] Y. B. Acar, , A. N. Alshawabkeh, and R. J. Gale, "Fundamentals of extracting species from soils by electrokinetics," Waste Manage., vol. 13, pp. 141-151, 1993.
[2] Y. B. Acar, and A. N. Alshawabkeh, "Principles of electrokinetic remediation," Environ. Sci. Technol., vol. 27 (13), pp. 2638-2647, 1993.
[3] Y. B. Acar, , A. N. Alshawabkeh, M. Bricka, R. J. Gale, R. E. Marks, R. Parker, and S. Puppala, "Electrokinetic remediation: basics and technology status," J. Hazard. Mater., vol. 40, pp. 117-137, 1995.
[4] A. N. Alshawabkeh, M. Bricka, and A. T. Yeung, "Practical aspects of in-situ electrokinetic extraction," J. Environ. Eng., vo1. 25, pp. 27-35, 1999.
[5] Design-Expert® Stat-Ease Inc., Version 8.0.5. Minneapolis, USA. Copyright© 2010.
[6] A. Giannis and E: Gidarakos, "Washing enhanced electrokinetic remediation for removal cadmium from real contaminated soil," J. Hazard. Mater., vol. 123, pp. 165-175, 2005.
[7] S. V. Ho, C. J. Athmer, A. P. Shapiro, and P. W. Sheridan, "Integrated in situ soil remediation tehnology: The Lasagna process," Environ. Sci. Technol., vol. 29 (10), pp. 2528-2534, 1995.
[8] S. V. Ho, C. J. Athmer, A. P. Shapiro, and P. W. Sheridan, "Scale-up aspects of the LAsagna TM process for in situ soil decontamination," J. Hazard. Mater., vol. 55, pp. 39-60, 1997.
[9] IBM® SPSS® Statistics Inc., Version 19.0. Apache Software Foundation. LEADTOOLS. Chicago, USA, 1989-2010.
[10] W. S. Kim, S. O. Kim, and K. W. Kim, "Enhanced electrokinetic extraction of heavy metals from soils assisted by ion exchange membranes," J. Hazard. Mater., vol. 118, pp. 93-102, 2005.
[11] D. Lestan, C. L. Luo, and X. D. Li, "A new approach to electrokinetic remediation of metal-contaminated soils: a review." Environ. Pollut., vol. 153, pp. 3-13, 2008.
[12] Z. Li, I. Neretnieks, and J. W. Yu, "A new approach to electrokinetic remediation of soils polluted by heavy metals," J. Contam. Hydrol., vol. 22, pp. 241-253, 1996.
[13] C. N. Mulliga, R. N. Yong, and B. F. Gibbs, "Surfactant-enhanced remediation of contaminated soil: a review," Eng. Geol., vol. 60, pp. 371-380, 2001.
[14] L. M. Ottosen, et al. "Case study on the strategy and application of enhancement solutions to improve remediation of soils contaminated with Cu, Pb, and Zn by means of electrodialysis," Eng. Geol., vol. 77, pp. 317-329, 2005.
[15] M. M. Page and C. L. PAge, "Electroremediation of contaminated soils," J. Environ. Eng., vol. 128 (3), pp. 208-219, 2002.
[16] R. F. Probstein, and R. E. Hicks, "Removal of contaminants from soil by electric fields," Science, vol. 260, pp. 498-503, 1993.
[17] B. E. Redd, M. T. Berg, J. C., Thompson, and J. H., Hatfield, "Chemical conditioning of electrode reservoir during electrokinetic soil flushing of Pb-contaminated silt loam," J. Environ. Eng., vol. 121, pp. 805-815, 1995.
[18] K. R. Reddy, R. E. Saichek, K. Maturi, and P. Ala, "Effects of soil moisture and heavy metal concentrations ın electrokinetic remediation," Indian Geotech. J., vol. 32 (2), pp. 258-288, 2002.
[19] K. R. Reddy and S. Chinthamreddy, "Sequentially enhanced electrokinetic remediation of heavy metals in low buffering clavey soils," J. Geotech. Geoenviron. Eng., vol. 129 (3), pp. 263-277, 2003.
[20] A. B. Ribeiro, and J. T. Mexia, "A dynamic model for the electrokinetic removal of copper from a polluted soil," J. Hazard. Mater., vol. 56, pp. 257-271, 1997.
[21] J. G. Sah, and J: Y. Chen, "Study of the electrokinetic process on Cd and Pb spiked soils," J. Hazard. Mater., vol. 58, pp. 301-315, 1998.
[22] U. S. D. A. - N. C. R. S., "Heavy metal soil contamination," Soil Quality - Urban Technical Note, 3, 2000.
[23] U. S. E. P. A., "Soil Sampling Standard Operating Procedures," U.S. Environmental Protection Agency, Environmental Response Team, SOP 2012, pp. 1-13, 2000.
[24] J. Virkutyte, M. Sillanpaa, and P. Latostenmaa, "Electrokinetic soil remediation - critical overview," Sci. Total Environ., vol. 289, pp. 97-121, 2002.
[25] A. T. Yeung, C. N. Hsu, and R. M. Menon, "EDTA-enhanced electrokinetic extraction of lead," J. Geotech. Eng., vol. 122 (8), pp. 666-673, 1996.
[26] D. M. Zhou, C. F. Deng, A. N. Alshawabkeh, and L. Cang, "Electrokinetic remediation of a Cu contaminated red soil by conditioning catholyte pH with different enhancing chemicals," Chemosphere, vol. 56, pp. 265-273, 2004.
[27] D. M. Zhou, C. F. Deng, A. N. Alshawabkeh, and L. Cang, "Effects of catholyte conditioning on electrokinetic extraction of copper from mine tailings," Environ. Int., vol. 31, pp. 885-890, 2005.