KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
권호 표지
DOI QR코드

DOI QR Code

Characteristics of Electrokinetic Remediation of Unsaturated Soil I : Experimental Study

불포화토의 동전기 정화 특성 I : 실험적 연구

  • 김병일 ((주)이제이텍 기술연구소) ;
  • 한상재 (한양대학교 공학기술연구소) ;
  • 김수삼 (한양대학교 토목.환경공학과)
  • Received : 2005.07.25
  • Accepted : 2005.11.02
  • Published : 2006.01.31
Download PDF
⟨ Previous Next ⟩

Abstract

The purpose of this study is to experimentally analysis the eletrokinetic phenomena and remediation characteristics developed during the application of electrokinetic remediation technique to unsaturated soils contaminated by heavy metals. In the laboratory a series of column tests are performed on degree of saturation for shooting range soil. The test results indicated that Pb is mainly removed under unsaturated conditions by electromigration within diffuse double layer, and if the initial containment concentration is below cation exchange capacity and equals to adsorption per unit soil solid weight, the remedial efficiency decreases with the decreasing of transport efficiency due to the changes in the degree of saturation in the electric gradient of 1V/cm.

본 연구에서는 중금속으로 오염된 불포화토에 대한 동전기 정화 기법 적용시 발생되는 동전기 현상과 정화 특성을 실험적으로 규명하고자 하였다. 이를 위해 사격장에서 채취한 시료에 대하여 포화도에 따른 일련의 동전기 정화 실험을 수행하였다. 실험 결과 불포화토에서의 납은 주로 확산이중층 내부에서의 직접적인 전기이온이동에 의해 제거되었고, 만약 1V/cm의 전압경사에서 초기 오염농도가 양이온교환능 이하이고 단위토립자당 흡착량이 동일하다면 포화도 증가에 따른 납의 이동효율의 감소로 인하여 제거율은 감소하는 것으로 나타났다.

Keywords

References

  1. 김정환(2004) 소수성 유기물에 의해 오염된 지반의 정화를 위한 Electrokinetic-Fenton 공정에 관한 연구, 박사학위논문. 중앙대학교
  2. A. N, and Parker, R. A. (1997) Theoretical and Experimental Modeling of Multi-species Transport in Soils Under Electric Fields, US EPA/600/R-97/054
  3. Eykholt G. R. (1992) Driving and complicating features of the electrokinetic treatment of contaminated soils, Ph.D Thesis, University of Texas at Austin, p. 269
  4. Fredlund, D. G. and Rahardjo, H. (1993) Soil Mechanics for Unsaturated Soils, John Wiley & Sons, Inc
  5. Hamed, Acar and Gale (1991) Pb(II) removal from kaolinite by electrokinetics, Journal of Geotechnical Engineering, ASCE, Vol. 117, No.2, pp. 241.271 https://doi.org/10.1061/(ASCE)0733-9410(1991)117:1(1)
  6. Hicks, R. E., and Tondorf, S. (1994) Electrorestoration of metal contaminated soils, Environmental Science and Technology, Vol. 28, No. 12, pp. 2203-2210 https://doi.org/10.1021/es00061a032
  7. Mattson, E. D., Bowman, R. S. and Lindgren, E. R. (2002a) Electrokinetic ion transport through unsaturated soil: 1. Theory, model development, and testing, Journal of Contaminant Hydrology, Vol. 54, pp. 99-120 https://doi.org/10.1016/S0169-7722(01)00164-4
  8. Mattson, E. D., Bowman, R. S. and Lindgren, E. R. (2002b) Electrokinetic ion transport through unsaturated soil: 2. Application to a heterogeneous field site, Journal of Contaminant Hydrology, Vol. 54, pp. 121-140 https://doi.org/10.1016/S0169-7722(01)00164-4
  9. Reuss, F. F. (1809) Sur un nouvel effet de leacute lectricite glavanique, Memoires de la Societe Imperiale des Naturalistes de Moscou, Vol. 2, pp. 327-337
  10. Sposito, G. (1989) The Chemistry of Soils, Oxford university press
  11. Wong, J. S. H., Hicks, R. D. and Probstein, R. F. (1997) EDTA enhanced electro-remediation of metal-contaminated soils, Journal of Hazardous Materials, Vol. 55, pp. 61-79 https://doi.org/10.1016/S0304-3894(97)00010-1
  12. Yeung A. T., Hsu, C. N. and Menon, R. M. (1996) EDTA enhanced electrokinetic extraction of lead, Journal of Geotechnical Engineering Vol. 122, pp. 221-237
  13. Yong, R. N., Warkentin, B. P. Phadungchewit, Y., and Galves, R. (1990) Buffer capacity and lead retention in some clay materials, Water, Air, and Soil Pollution, No. 53, pp. 53-67
  14. Yu, T. R. (1997). Chemistry of Variable Charge Soils, Oxford university Press