Effect of EDTA Chemical Leaching on Remediation of Chromium-contaminated Soil

Abstract

In this paper, chemical EDTA leaching was carried out to repair chromium-contaminated soil, and 0.005mol/L, 0.01mol/L, 0.05mol/L and 0.1mol/L EDTA solution were used to wash chromium-contaminated soil, respectively, and the removal efficiency of Cr (Ⅵ) in soil under different concentrations of EDTA solution was studied. The results showed that when the concentration of EDTA solution was 0.05mol/L, the highest removal efficiency of Cr (Ⅵ) in the soil was 98.65%, and after reaching the optimal leaching concentration, the leaching concentration continued to increase, and the leaching effect did not increase but decreased.