Abstract
Electrokinetic (EK) remediation is a technology for removing pollutants from clayey soil on the basis of electrokinetic phenomena. Zero valence iron (Fe(0)) has recently attracted attention as a new sorption and reaction medium for removing Trichloroethylene (TCE) from wastewater. The purpose of this study is to demonstrate the combined use of EK remediation and permeable reactive barrier (PRB) technology to remediate soil contaminated by TCE and p-chlorophenol (PCP). The dechlorination by iron of TCE in a solution was performed at various pHs. Chloride ions generated by the dechlorination of TCE with iron powder were found in the solution. An EK remediation system with an iron reaction wall cannot only move organochlorine compounds in soil but also convert these to other compounds by dechlorination. PCP level was decreased more by the use of an EK remediation system with an iron reaction wall than by the use of an EK remediation system without. Therefore, the combination of the use of an iron reaction wall with EK remediation facilitates the removal of pollutants from the clayey soil contaminated with organochlorine compounds such as TCE and PCP.
