A review on techniques to enhance electrochemical remediation of contaminated soils

Albert T. Yeung*, Ying Ying Gu

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

317 Scopus citations

Abstract

Electrochemical remediation is a promising remediation technology for soils contaminated with inorganic, organic, and mixed contaminants. A direct-current electric field is imposed on the contaminated soil to extract the contaminants by the combined mechanisms of electroosmosis, electromigration, and/or electrophoresis. The technology is particularly effective in fine-grained soils of low hydraulic conductivity and large specific surface area. However, the effectiveness of the technology may be diminished by sorption of contaminants on soil particle surfaces and various effects induced by the hydrogen ions and hydroxide ions generated at the electrodes. Various enhancement techniques have been developed to tackle these diminishing effects. A comprehensive review of these techniques is given in this paper with a view to providing useful information to researchers and practitioners in this field.

Original languageEnglish
Pages (from-to)11-29
Number of pages19
JournalJournal of Hazardous Materials
Volume195
DOIs
StatePublished - 15 Nov 2011

Keywords

  • Contaminant solubilization
  • Coupling of remediation technologies
  • Electrochemical remediation
  • Enhancement techniques
  • Soil pH control
  • Soil remediation

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