EXPERIMENTAL STUDY ON THE HYDRO-CHEMICAL PROPERTY IN THE SOIL UNDER AN APPLIED ELECTRIC GRADIENT

Electrokinetic remediation technique is gaining increasing attention as one of the technologies for decontaminating soil and groundwater. In this method, however, sufficient efficiency has not been attained, because of the difficulty in controlling complex chemical reactions that retard the transport of ions. In order to understand the mass transport in the soil, the relationship between soil property and main hydrochemistry mechanism should be clarified. Three kinds of model soils were compared in terms of copper transport efficiency. Hydraulic conductivity of soils, clay content and main mechanism of ion transport were studied by laboratory experiment. The results are as follows; 1) The electrokinetic treatment is suitable for the soils that have high hydraulic conductivity and low clay content. 2) In this case, 13% of copper was removed from the system and 46% of copper was removed from 4/5 of the system. 3) It was confirmed that main mechanism of ion transport was the electromigration.