Desorption characteristics of kaolin clay contaminated with zinc from electrokinetic soil processing

  • Myung Ho Lee
  • Masashi Kamon
  • Soo Sam Kim
  • Jai-Young Lee
  • Ha Ik Chung
Original Paper

Abstract

A number of bench scale laboratory column tests were carried out using a newly designed and developed electrokinetic cell to investigate the fundamental behavior of zinc-spiked kaolin clay subjected to an electric field. Laboratory investigations focused on (i) zinc migration by the combined effects of electromigration and electro-osmosis and (ii) the electrically induced desorption characteristics of zinc-contaminated kaolin that occurred during processing. The correlations of the applied voltage gradient, electro-osmotic flow rate, and the development of a pH gradient were examined and evaluated. The results showed that the removal efficiency was high during the early stage of processing due to rapid desorption by electrokinetic effects in the cathode region. However, the majority of zinc migrating from the anode was precipitated due to the high pH environment in the cathode region.

Keywords

Desorption Electrokinetics Kaolin pH Removal efficiency Zinc 

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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • Myung Ho Lee
    • 1
  • Masashi Kamon
    • 2
  • Soo Sam Kim
    • 3
  • Jai-Young Lee
    • 4
  • Ha Ik Chung
    • 5
  1. 1.Department of Civil & Environmental EngineeringHanyang UniversityAnsan, Kyungki-DoRepublic of Korea
  2. 2.Graduate School of Global Environmental StudiesKyoto UniversityKyotoJapan
  3. 3.Department of Civil & Environmental EngineeringHanyang UniversityAnsanRepublic of Korea
  4. 4.Department of Environmental EngineeringThe University of SeoulSeoulKorea
  5. 5.Geotechnical Engineering ResearchKorea Institute of Construction Technology (KICT)Koyang-SiRepublic of Korea

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