Eletrokinetic removal of residual petroleum from clayey soil treated by soil washing

초록

The current was increased because Na+ and Mg+ migrated into electrokinetic cell. Accumulated EOF using 0.1M NaOH was higher than that using 0.1M MgSO4 because alkaline conditions enhanced electro-osmotic flow due to more negative zeta potential. Desorption of TPH was enhanced by surfactant and the solubilized TPH was transported by EOF. Although solubility of TPH was enhanced by surfactant, removal efficiency of TPH was very low because EOF was low. That means TPH was mainly removed by EOF.