Effect Analysis of Removing Lead and Arsenic from contaminated soil by Selected Eluents

In order to reduceof the amount of lead and arsenic in contaminated soil, CA(citric acid), PA(polyepoxysuccinic acid), MA(malic acid) and EDTA were used to remove as chemical extractor. The experiments showed that the extraction ability of lead was EDTA>CA>MA>PA, and of arsenic was MA>CA>PA=EDTA. The eluents concentration, reaction period and liquid/solid ratio were the key factor of extraction effect. It was evident that the optimal condition was 0.1 mol/L eluent and 2h of extraction period.