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A Study on the Leachate Characteristics of Heavy Metals from MSW Bottom Ash Solidified with Stabilizing Reagents

안정화제를 첨가한 생활폐기물 소각시설 바닥재의 중금속 용출특성에 관한 연구

  • Lim, Jong-Wan (School of Environmental Engineering, University of Seoul) ;
  • Dong, Jong-In (School of Environmental Engineering, University of Seoul)
  • 임종완 (서울시립대학교 환경공학부) ;
  • 동종인 (서울시립대학교 환경공학부)
  • Received : 2015.09.04
  • Accepted : 2015.10.19
  • Published : 2015.12.10

Abstract

In this study, the reduction efficiencies of leachate heavy metal levels were investigated by adding $Al_2O_3$ and CaO to the bottom ash to observe their effects on the heavy metals leachate reduction efficiency. The ratio of $Al_2O_3$ and CaO contents were varied by 10~40% (W/W) alongside different curing time of 7 and 28 days. The reduction efficiencies of leachate heavy metal levels were estimated to be 69.3% for Cu and 52.1% for Pb during the curing time of 7 days. For the curing time of 28 days, the efficiencies changed to 85.2 and 100% for Cu and Pb, respectively. It was thus confirmed that the high reduction efficiency could be obtained as the curing time increased.

Keywords

bottom ash;stabilization/solidification;heavy metal;CaO;$Al_2O_3$

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