KSCE Journal of Civil Engineering

, Volume 10, Issue 3, pp 181–187 | Cite as

Dewatering and decontamination of artificially contaminated sediments during electrokinetic sedimentation and remediation processes

Geotechnical Engineering
Received:
Accepted:
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Abstract

Sediments contain significant water, clay, colloidal fraction and contaminants, and can result in soft strata with high initial void. Its potential hazards of the sediments are existed in subsurface environments. Electrokinetic technique has been used in sedimentat ion and remediation for volume reduction of slurry tailing wastes and extraction of contaminants from contaminated soils. In this research, the coupled effects of sedimentation and remediation of contaminated sediments are investigated using electrokinetic sedimentation and remediation techniques from experimental aspects. A series of laboratory experiments including variable conditions such as initial solid content of the specimen, concentration level of the contaminant, and magnitude of applied voltage are performed with the contaminated sediment specimens mixed with ethylene glycol. Commercially available high specification Kaolin was used to simulate sediment. From the test results, the quantity of accumulated outflow is increased with increasing voltage applied, otherwise the quantity of accumulated outflow is decreased with increasing solid content and contamination level. The removal speed and time of contaminant was shortened with increasing voltage applied, and with decreasing solid content and contamination level.

Keywords

sediment soft soil electrokinetics contamination remediation 
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References

  1. Acar, Y.B. and Alshawabkeh, A.N. (1993). “Principles of electrokinetic remediation.”Environmental Science and Technology, Vol. 27, No. 13, pp. 26382647.CrossRefGoogle Scholar
  2. Acar, Y.B., Li, H., and Gale, R.J. (1992) “Phenol removal from kaolinite by electrokinetics.”Journal of Geotechnical Engineering, ASCE, Vol. 118, No. 11.Google Scholar
  3. Buckland, D.G., Shang, J.Q., and Mohamedelhassan, E. (2000). “Electrokinetic sedimentation of contaminated Welland River sediment.”Can. Geotech. J., Vol. 37, pp. 735–747.CrossRefGoogle Scholar
  4. Chung, H.I. and Kang, B.H. (1999). “Pb removal from contaminated marine clay by electrokinetic soil decontamination.”Engineering Geology, Vol. 53, pp. 139–150.CrossRefGoogle Scholar
  5. Chung, H.I. and Kamon, M. (2000a). “Sedimentation and remediation of contaminated waste slurries by electrokinetics.”Creation of New Geo-Environment, Fourth Kansai International Geotechnical Forum.Google Scholar
  6. Chung, H.I. and Kamon, M. (2000b). Electrokinetic sedimentation and remediation of contaminated slurry wastes,5th International Symposium on Environmental Geotechnology and Global Sustainable Development.Google Scholar
  7. Gularte, F.B. (1973).Stabilization of Polluted Dredgings by Electroosmosis, M.S. Dissertation, Northwestern Univ., Evanston.Google Scholar
  8. Hamed, J.T. (1990).Decontamination of Soil Using Electro-osmosis, PhD dissertation, Louisiana State University, pp 194.Google Scholar
  9. Hamnet, R. (1980). “A study of the processes involved in the electro reclamation of contaminated soils.”MS Thesis, University of Manchester, England.Google Scholar
  10. Pamukcu, S., Khan, L.I., and Fang, H.Y. (1990). “Zinc detoxification of soils by electro-osmosis.”Transportation Research Record. No. 1288, p. 4146.Google Scholar
  11. Reddy, K.R. and Saichek, R.E. (2002). “Electrokinetic removal of phenanthrene from kaolin using different surfactants and cosolvents.”Evaluation and Remediation of Low Permeability and Dual Porosity Environments, ASTM STP 1415, M. N. Sara and L. G. Everett, Eds., ASTM International, West Conshohocken, PA.Google Scholar
  12. Shang, J.Q. (1996a). “Electrokinetic dewatering of clay slurries as engineered soil covers.”Can. Geotech. J., Vol. 34, pp. 78–86.CrossRefGoogle Scholar
  13. Shang, J.Q. (1996b). “Electrokinetic sedimentation: a theoretical and experimental study.”Can. Geotech. J., Vol. 34, pp. 305–314.CrossRefGoogle Scholar
  14. Yeung, A.T. (1993). Electrokinetic flow processes in porous media and their applications, p. 74.Google Scholar
  15. Yeung, Y.B., Scott, T.B., Gopinath, S., Menon, R.M., and Hsu, C. (1997). “Design, fabrication, and assembly of an apparatus for electrokinetic remediation studies.”Geotechnical Testing Journal, GTJODJ, Vol. 20, No. 2, pp. 199–210.Google Scholar
  16. Yukawa, H., Yoshida, H., Kobayashi, K., and Hakoda, M. (1976). “Fundamental study on electro-osmotic dewatering of sludge at constant electric current.”Journal of Chemical Engineering of Japan, Vol. 9, No. 5, pp. 402–407.CrossRefGoogle Scholar

Copyright information

© KSCE and Springer jointly 2006

Authors and Affiliations

  1. 1.Geotechnical Engineering Dept.Korea Institute of Construction TechnologyKorea

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