Remediation of in-situ Leach Mining Contaminated Soil by Amendment-plant Synergism

This study is aimed to remediate in-situ leach mining contaminated soil by amendment-plant synergism. The results showed that plant species exhibited extremely significant effects on the concentration of nitrate nitrogen; to be specific, the concentration of nitrate nitrogen in soil planted with wheat was reduced from 692.19 mg/kg to lower than 100 mg/kg. The amendment type exhibited extremely significant effects on the concentration of ammonium nitrogen; to be specific, when the mass ratio of amendment to soil reached 10:50, the concentration of ammonium nitrogen in soil added with 2-3 mm zeolite was reduced from 23 593.75 to 3 300 mg/kg on thy 15. Amendments and plants mainly exhibited desorption performance for sulfate radical in soil, and the amendment type extremely significantly affected the concentration of sulfate radical; to be specific, the concentration of sulfate radical in soil added with limestone increased from 370 mg/kg to 900 mg/kg on day 7.