Studies on electrokinetic remediation of radioactively contaminated soil by using sulfuric acid

H2SO4and citric acid were used as additives for the electrokinetic remediation experiment to increase removal efficiency of 13'7Cs and 60Co from the radioactive soil waste stored for more than 10 years. The average effluent velocity discharged from the electrokinetic remediation experimental column was 2.010 cm/min and the discharged soil wastewater volume for 10 days is 3.6 pore volume of the column. 97% of 60Co in the column was decontaminated for 10 days of operation, while only 54% of 137Cs was decontaminated. These results are considered that the absorption equilibrium coefficient of 13'7Cs is higher than that of 60Co. The predicted values of the residual concentration by the proposed mathematical model were well coincided with the experimental results within the experimental error range