Applicability Evaluation of Electrodes Exchange and Mixed Solution for Enhanced Electrokinetic Process

Electrokinetic Process의 효율 향상을 위한 전극교환 방식과 혼합용매 적용 가능성 평가

  • Lee, Noh-Sup (Department of Environmental Engineering, Konkuk University) ;
  • Park, Sung-Soo (Han-River Basin Environmental Office, Ministry of Environment) ;
  • NamKoong, Wan (Department of Environmental Engineering, Konkuk University)
  • 이노섭 (건국대학교 환경공학과) ;
  • 박성수 (환경부 한강유역환경청) ;
  • 남궁완 (건국대학교 환경공학과)
  • Received : 2007.07.18
  • Accepted : 2007.07.23
  • Published : 2007.08.10

Abstract

This study investigated the feasibility of enhanced electrokinetic (EK) remediation of soil contaminated with approximately 20000 Pb-mg/kg. Enhanced EK remediation was evaluated by using mixed solution (0.3 M acetic acid and 0.03 M EDTA, EK-M) and by exchanging electrodes for preventing precipitation of metal hydrate. For the EK-M, the lead removal efficiency was only 2% lower than the case where 0.03 M EDTA was solely used (EK-Blank, EK-B). Considering the costly expense of EDTA, the application of EK-M would be economically viable. The efficiency of of EK-E was higher by 2% than the EK-B method. More impertantly, the pH values of entire soil packed column presented to be neutral (7~8) in the EK-E process. Unlike to EK-B and EK-M, the deposition of heavy metals to any specific area was avoided in the EK-E process.

Keywords

electrokinetic process;heavy metal removal;electrode exchange;mixed flushing solution;soil remediation

Acknowledgement

Supported by : 건국대학교

References

  1. M. Garcia Nogueira, M. Pazos, M.A. Sanroman, and C. Cameselle, Electrochimica Acta, 52, 3349 (2007) https://doi.org/10.1016/j.electacta.2006.03.115
  2. A. P. Davis and B. V. Hotha, J. Environ. Eng., 124, 1066 (1988)
  3. J. Rohrs, G. Ludwig, and D. Rahner, Electrochimica Acta, 47, 1405 (2002) https://doi.org/10.1016/S0013-4686(01)00855-6
  4. S. J. Han and S. S. Kim, Korean Society of Env. Eng., 23, 1349 (2001)
  5. S. S. Park, Master's thesis, Konkuk University, Seoul, Korea (2004)
  6. S. Chinthamreddy, Ph.D. Dissertation, University of Illinois at Chicago, USA (1999)
  7. S. Amrate, D. E. Akretche, C. Innocent, and P. Seta, Science of the Total Environment, 349, 56 (2005) https://doi.org/10.1016/j.scitotenv.2005.01.018
  8. S. J. Han, S. S. Kim, J. K. Jeon, Y. S. Cho, and B. I. Kim, Korean Society of Env. Eng., 25, 301 (2003)
  9. B. Segal, C. E. Obannon, and J. A. Matthias, J. Geotech. Eng., 106, 1148 (1980)
  10. B. E. Reed, M. T. Berg, J. C. Thompson, and J. H. Hatfield, J. Environ. Eng., 121, 805 (1995)
  11. J. B. Kim, S. S. Woo, J. H. An, C. Jeon, Y. D. Kwon, Y. J. Chung, and K. H. Park, J. Korean Ind. Chem., 16, 556 (2005)
  12. L. V. Cauwenberghe, Electrokinetics, 1, GWRTAC, Pittsburgh, PA, (2002)
  13. Y. B. Acar and A. N. Alshawabkeh, Theoretical and Experimental Modeling of Multi Species Transport in Soils under Electric Fields, EPA Report, 600/R-97/054 (1997)
  14. L. Di Palma, P. Ferrantelli, C. Merli, and F. Biancifiori, J. Hazard. Mater., B103, 153 (2003)
  15. T. Kimura, K. Takase, and S. Tanaka, J. Hazard. Mater., 143, 668 (2007) https://doi.org/10.1016/j.jhazmat.2007.01.011
  16. G. N. Kim, W. Z, Oh, H. J. Won, and W. K. Choi, J. Ind. Eng. Chem., 9, 306 (2003)
  17. P. V. Sivapullaiah and B. S. Nagendra Prakash, J. Hazard. Mater., 143, 682 (2007) https://doi.org/10.1016/j.jhazmat.2007.01.015
  18. G. C. C. Yang and S. L. Lin, J. Hazard. Mater., 58, 285 (1998)
  19. S. S. Hwang, N. S. Lee, and W. Namkoong, Korean Society of Env. Eng., 27, 1072 (2005)
  20. H. S. Lee, K. Lee, S. S. Kim,, and S. W. Ko, J. Ind. Eng. Chem., 9, 360 (2003) https://doi.org/10.1021/ie50088a012
  21. Y. B. Acar and A. N. Alshawabkeh, Environ. Sci. Technol., 27, 2638 (1993) https://doi.org/10.1021/es00043a606
  22. S. R. Cline, Master, thesis West Virginia University, USA (1993)
  23. O. Gyliene, J. Aikaite, and O. Nivinskiene, J. Hazard. Mater., B116, 119 (2004)
  24. J. Hamed, Y. B. Acar, and R. J. Gale, J. Geotech. Eng., 117, 241 (1991) https://doi.org/10.1061/(ASCE)0733-9410(1991)117:2(241)
  25. Y. B. Acar, R. J. Gale, A. N. Alshawabkeh, R. E. Marks, S. Puppala, M. Bricka, and R. Parker, J. Hazard. Mater., 40, 117 (1995)