Ex-situ remediation of Xiangtan manganese ore contaminated tailing soil using selective extractants

Under varied extracting conditions, this experiment used HCl, Na-2 - EDTA, citric acid(CA) as extractants to renovate the Xiangtan Manganese Ore contaminated tailing soil, researched the removal efficiencies of three kinds of heavy metals Mn, Pb and Cd. The results showed that CA was effective at extracting these heavy metals, and the concentration of CA was the main factor affected the removal results; Na-2 - EDTA was effective at extracting Pb, and the concentration of Na-2 - EDTA was the main factor affected the results; HCl was effective at extracting Cd, and the dosage of HCl affected the removal results most, but it was not effective at extracting Mn and Ph. From the experiment, we know that CA is the most suitable candidate for the remediation of the Xiangtan Manganese Ore contaminated tailing soil.