Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
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Removal Characteristics of Heavy Metals in Acid Mine Drainage (AMD) Using Porous Starfish Ceramics (I) - Treatment of AMD in a Batch Reactor System

불가사리 소재 다공성 세라믹을 이용한 산성광산배수 내 중금속의 제거특성(I) - 회분식 실험을 통한 산성광산배수의 처리특성

  • Lee, Yonghwan (Department of Civil & Environmental Engineering, Jeonnam Provincial College) ;
  • Yim, Soobin (Department of Environmental Engineering, Kyungsung University)
  • Received : 2014.07.22
  • Accepted : 2014.09.24
  • Published : 2014.12.01
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Abstract

This study was performed to investigate the removal characteristics of heavy metals in Acid Mine Drainage (AMD) using pellet-type Zeolite-StarFish ceramics (ZSF ceramics), in which natural zeolite and starfish were mixed and calcined with wood flour. Kinetic experiment showed the removal reaction of heavy metals by ZSF ceramics reached the equilibrium status within 3 hours. The optimal calcination temperature range for removal of heavy metals was measured to be $800{\sim}1,000^{\circ}C$. The calcination time had little effect on the removal of heavy metal in AMD. The adequate dose of ceramics was shown to be 1.0~1.2 % for removal of heavy metals in AMD. High removal efficiencies of heavy metals (Al, As, Cd, Cu, Fe, Mn, Zn) in AMD, more than 95 % except for Pb, were obtained under the condition of dose of ceramics more than 1.0 %. The removal efficiencies of heavy metals increased with increasing mixing concentration of wood flour. The adequate mixing concentration of wood flour was observed to be 10 %. The batch experimental results exhibited that the ZSF ceramics could act as an efficient ceramics for removal of heavy metals in AMD and the wood flour could provide porous ZSF ceramics with enhanced removal efficiency of heavy metals.

천연제올라이트와 불가사리를 목분과 함께 혼합 소성한 펠렛형 Zeolite-StarFish 세라믹(ZSF 세라믹)을 이용하여 산성광산배수 내 중금속의 제거특성 및 영향인자를 파악하고자 하였다. ZSF 세라믹에 의한 중금속의 제거반응은 초기 3시간까지 빠른 속도로 진행되었으며 높은 알칼리 상태를 나타내었다. 중금속 제거를 위한 ZSF 세라믹의 최적 소성온도는 $800{\sim}1,000^{\circ}C$로 파악되었으며 소성시간에 따른 중금속 제거효율의 변화는 거의 나타나지 않았다. ZSF 세라믹의 최적 투여농도는 1.0~1.2 %임을 알 수 있었고, 1.0 % 이상의 ZSF 세라믹의 투여농도 조건에서는 Pb 85.5 %를 제외한 Al, As, Cd, Cu, Fe, Mn, Zn 대부분의 중금속이 95 % 이상의 높은 제거효율을 나타내었다. 목분의 배합비가 증가할수록 중금속 제거효율은 증가하였으며 목분의 적정 배합비는 10 %로 파악되었다. 회분식 실험을 통해 불가사리 소재의 ZSF 세라믹은 산성광산배수 내 중금속을 효과적으로 제거할 수 있는 처리제임을 알 수 있었으며, 특히 목분을 첨가한 다공성 ZSF 세라믹을 통해서는 산성광산배수 내 중금속의 제거효율을 더욱 향상시킬 수 있었다.

Keywords

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