Remediation of Tetrachloroethylene Contaminated Soil with Zero Valent Iron Utilizing Electrokinetic Reactors

This study was conducted to evaluate an integrated technique a combination of electrokinetics (EK) and zero-valent iron and a nonionic surfactant, Triton X-100(TX-100), which was selected as the solubility-enhancing agent for the remediation of soils-contaminated with Tetrachloroethylene (TCE). Four Lab-scale tests (T1 toT4) were conducted to investigate the performance of EK-PRB on TCE removal from soils. Electrical current, cumulative electro-osmosis flow and the pH in anode and cathode reservoir were measured every 24h during the run. Results show that coupling EK with ZVI- PRB would greatly enhance the removal efficiency of TCE from soils. With this method TCE removal would generally be increased by approximately 40% when EK is coupled with PRB as compared with EK alone. The highest TCE removals were respectively recorded in T4 about 80% and 55% near to the anode and cathode of the electrokinetic cell.