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Effects of pH Control Methods on Removal Efficiency in Electrokinetic Bioremediation of Phenanthrene-contaminated Soil  

Kim, Sang-Joon (The Korean Intellectual Property Office)
Park, Ji-Yeon (Korea Institute of Energy Research)
Lee, You-Jin (Department of Chemical and Biomolecular Engineering, KAIST)
Yang, Ji-Won (Department of Chemical and Biomolecular Engineering, KAIST)
Publication Information
KSBB Journal / v.21, no.3, 2006 , pp. 181-187 More about this Journal
Abstract
In this study, problems related with pH control in electrokinetic(EK) bioremediation of phenanthrene contaminated soil were observed, and the effects of pH control methods on the removal efficiency were investigated to search a further application strategy. In a preliminary experiment, it was found out by flask cultivation that a certain sulfate concentration was needed to degrade phenanthrene well using Sphingomonas sp. 3Y. However, when $MgSO_4$ was used as sulfate source in EK bioremediation, the bacterial activity reduced seriously due to the abrupt decrease of pHs in soil and bioreactor by the combination of magnesium and hydroxyl ions. When another strong buffering compound was used to control the pH problem, the good maintenance of the bacterial activity and pHs could be observed, but the removal efficiency decreased largely. When a low concentration of $MgSO_4$ was added, the removal efficiency decreased somewhat in spite of the good maintenance of neutral pHs. With the addition of NaOH as a neutralizing agent, the removal efficiency also decreased because of the increase of soil pH. Consequently the selection of electrolyte composition was a very important factor in EK bioremediation and some sulfate sources suitable for both bacterial activity and contaminant degradation should be investigated.
Keywords
pH control; electrokinetic bioremediation; phenanthrene; bacterial activity; electrolyte composition;
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1 Cookson, J. T. (1995), Bioremediation Engineeing, McGraw-Hill Inc., USA
2 Baltch, A. L., Smith, R. P., Franke, M. A., Ritz, W. J., Michelsen, P., Bopp, L. H., and J. K. Singh (2000), Microbicidal activity of MDI-P against Candida albicans, Staphylococcus aureus, Pseudomonas aeruginosa, and Legionella pneumophila, Am. J. Infect. Control 28(3), 251-257   DOI   ScienceOn
3 Rietz, D. N. and R. J. Haynes (2003), Effects of irrigation-induced salinity and sodicity on soil microbial activity, Soil Bio. Biochem. 35(6), 845-854   DOI   ScienceOn
4 Yang, J. W., Kim, S. J., Park, J. Y., and Y. J. Lee (2002), The role of cation on electroosmotic flow in electrokinetic remediation, J. KSEE 24(12), 2183-2190
5 Jeong, H. I. (1998), Geotechnical engineering, Yurim, Taeun Publishers, Republic of Korea
6 Acar, Y. B. and A. N. Alshawabkeh (1993), Principles of electrokinetic remediation, Environ. Sci. Technol. 27(13), 2638-2647   DOI   ScienceOn
7 Lee, H. H. and J. W. Yang (2000), A new method to control electrolytes pH by circulation system in electrokinetic soil remediation, J. Hazard. Mater. 77(1-3), 227-240   DOI   ScienceOn
8 Acar, Y. B. and A. N. Alshawabkeh (1997), Electrochemical decontamination of soil and water, J. Hazard. Mater. 55(1-3), 322   DOI   ScienceOn
9 Cooper, D. A., Peterson, K., and D. Simpson (1996), Hydrocarbon, PAH and PCB emissions from ferries: A case study in the Skagerak- Kattegatt-Oresund region, Atmos. Environ. 30(14), 2463- 2473   DOI   ScienceOn
10 Kim, S. J., Park, J. Y., Lee, Y. J., Lee, J. Y., and J. W. Yang (2005), Application of a new electrolyte circulation method for ex situ electrokinetic bioremediation of a laboratory-prepared pentadecane contaminated kaolinite, J. Hazard. Mater. B118, 171-176
11 Acar, Y. B. and A. N. Alshawabkeh (1996), Electrokinetic remediation. 1. Pilot-scale tests with lead spiked kaolinite, J. Geotec. Eng. 122, 173-185   DOI
12 Luo, Q., Zhang, X., Wang, H., and Y. Qian (2005), The use of non-uniform electrokinetics to enhance in situ bioremediation of phenol-contaminated soil, J. Hazard. Mater. B121, 187-194
13 Shapiro A. P. and R. F. Probstein (1993), Removal of contaminants from saturated clay by electroosmosis, Environ. Sci. Technol. 27(2), 283-291   DOI
14 DeFlaun, M. F. and C. W. Condee (1997), Electrokinetic transport of bacteria, J. Hazard. Mater. 55, 263-277   DOI   ScienceOn
15 Mohammed, N. (1996), State-of-the-art review of bioremediation studies, J. Environ. Sci. Hlth. A31(7), 1547-1574
16 Pamukcu, S., Weeks, A., and J. K. Wittle (1997), Electrochemical extraction and stabilization of selected inorganic species in porous media, J. Hazard. Mater. 55(1-3), 305-318   DOI   ScienceOn
17 Pierzynski, G. M., Sims, J. T., and G. F. Vance (1994), Soils and environmental quality, Lewis Publishers, CRC Press Unc., U.S.A.
18 Vogel, T. M., D. Grbic-Galic (1986), Incorporation of Oxygen from Water into Toluene and Benzene during Anaerobic Fermentative Transformation, Applied Environ. Microbiol. 52(1) 200-202
19 Acar, Y. B. and A. N. Alshawabkeh (1993), Principles of electrokinetic remediation, Environ. Sci. Technol. 27(13), 2638-2647   DOI   ScienceOn
20 Clarke, R. L., Lageman, R., Pool, W., and Clarke S. R., Electro chemically-aided biodigestion of organic materials, US Patent 5,846,393 (1998)
21 Yang, J. W., Park, J. Y., Kim, S. J., and Y. J. Lee (2003), Understanding of electroosmosis in surfactant-enhanced electrokinetic remediation, J. of KSEE 25(1), 73-78
22 Zhu, W. H., Ke, J. J., Yu, H. M., and D. J. Zhang (1995), A study of the electrochemistry of nickel hydroxide electrodes with various additives, J. Power Sources, 56(1), 75-79   DOI