Long-term Leaching Characteristics of Lead Contaminated Soils treated with Soluble Phosphate

액상인산염으로 처리된 납 오염토양 복원의 장기용출 특성

  • 이의상 (상명대학교 토목환경공학과)
  • Published : 2006.03.01


A long-term leaching column experiment was performed to evaluate the teachability of the stabilized lead-contaminated soil using soluble phosphate. The study shows that Pb in the leachate was little detected and the remaining $PO_4-P$ concentration kept below 0.1 mg/L due to the formation of geochemically stable lead phosphate minerals from the reactions of labile soil Pb forms with the added soluble phosphate salt. After the experiment, there was no Pb migration from the top to the bottom of the stabilized soil column. But the Pb concentrations of the 12 soil samples from the control column decreased with the increase of the soil depth.