Journal of Soil and Groundwater Environment (한국지하수토양환경학회지:지하수토양환경)

Korean Society of Soil and Groundwater Environment (한국지하수토양환경학회)
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Stabilization of Heavy Metal-Contaminated Mine Tailings Using Phosphate Fertilizers and Red Mud

인산염 비료 및 레드머드를 이용한 중금속 오염 광미의 안정화

  • Kang, Sin-Hyun (Department of Civil & Environmental Engineering, Pusan National University) ;
  • Ahn, Jun-Young (Department of Civil & Environmental Engineering, Pusan National University) ;
  • Hwang, Kyung-Yup (Department of Civil & Environmental Engineering, Pusan National University) ;
  • Seo, Jeong-Yun (Department of Civil & Environmental Engineering, Pusan National University) ;
  • Kim, Jae-Gon (Geologic Environment Division, Korea Institute of Feoscience and Mineral Resources) ;
  • Song, Ho-Cheol (Department of Environment and Energy, Sejong University) ;
  • Yim, Soo-Bin (Department of Environmental Engineering, Kyungsung University) ;
  • Hwang, In-Seong (Department of Civil & Environmental Engineering, Pusan National University)
  • 강신현 (부산대학교 사회환경시스템공학과) ;
  • 안준영 (부산대학교 사회환경시스템공학과) ;
  • 황경엽 (부산대학교 사회환경시스템공학과) ;
  • 서정윤 (부산대학교 사회환경시스템공학과) ;
  • 김재곤 (한국지질자원연구원 지구환경연구본부) ;
  • 송호철 (세종대학교 환경에너지융합학과) ;
  • 임수빈 (경성대학교 환경공학과) ;
  • 황인성 (부산대학교 사회환경시스템공학과)
  • Received : 2011.07.01
  • Accepted : 2011.08.25
  • Published : 2011.10.31
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Abstract

The objectives of this study were to investigate the efficiencies of the stabilizers such as mono-potassium phosphate (MKP), phosphate fertilizer and red mud in treating the mine tailings contaminated with heavy metals and to characterize the changes in fractionations of the heavy metals during the stabilization. The TCLP results showed that the stabilization efficiencies of Cd, Pb and Zn increased with the increase in the stabilizer dosage and the reaction times. MKP showed the highest efficiencies for the heavy metals stabilization among the stabilizers tested. When the mine tailings were amended with MKP, the TCLP concentrations of Cd, Pb and Zn were reduced by 79~97%, 61~84%, and 89~99%, respectively. When the composite stabilizers, MKP/phosphate fertilizer or MKP/red mud, were used, the stabilization efficiencies were lower than when MKP was used as a single stabilizer. The sequential extraction results showed that carbonates fraction of Cd and Zn increased generally. Especially, when red mud was used, carbonates fraction of Cd and Zn increased 5 and 18 times, respectively. In the case of Pb, the treatment with MKP increased residual fraction by 10 times. The results showed that MKP was the most effective in stabilizing the heavy metals (Cd, Pb and Zn) to improve the efficacy of the composite binders.

Keywords

References

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