Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Removal of Dissolved Heavy Metals in Abandoned Mine Drainage by Ozone Oxidation System

오존산화를 이용한 폐광산배수 내 용존 중금속 제거에 관한 연구

  • 서석호 (연세대학교 토목환경공학과 환경공학연구실) ;
  • 안광호 (연세대학교 토목환경공학과 환경공학연구실) ;
  • 이정규 (연세대학교 토목환경공학과 환경공학연구실) ;
  • 김건중 (연세대학교 토목환경공학과 환경공학연구실) ;
  • 주경훈 (연세대학교 토목환경공학과 환경공학연구실) ;
  • 라영현 ((주)옥센텍) ;
  • 고광백 (연세대학교 토목환경공학과 환경공학연구실)
  • Received : 2009.09.29
  • Accepted : 2010.06.01
  • Published : 2010.09.30
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Abstract

This study was to evaluate the ozone oxidation of dissolved Fe, Mn, $SO{_4}^{2-}$ ions and color in abandoned mining drainage by conducting a bench-scale operation at various reaction times in an ozone reactor. The influent was collected from an abandoned mine drainage (AMD) near the J Mine in Jungsungun, Kangwon Province. The ozone reactor was operated at ozone reaction times of 10, 20 and 30 min with ozone doses of 0.0 and $2.4g\;O_3/hr$. Samples from each effluent from subsequent sand filtration were regularly collected and analyzed for pH, Fe, Mn, Al, Cr, Hg, $SO{_4}^{2-}$, alkalinity, color, ORP, TDS and EC. The effluent concentrations of Fe and Mn from the sand filter were less than 0.1 mg/L, which were below the concentrations on Korean drinking water quality standards (Fe, Mn < 0.30 mg/L). The influent $SO{_4}^{2-}$, concentrations were not noticeably changed during this ozone oxidation. Cr and Hg in the raw wastewater from the abandoned mining drainage were not detected in this study. The experimental result shows that the ozone oxidation of dissolved heavy metals and subsequent sand filtration of metal precipitates are desirable alternative for removing heavy metals in AMD.

Keywords

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