현장 파일럿 실험을 통한 광산배수 내 Fe, As, Mn 자연정화처리 효율평가 = A Field Study on the Application of Pilot-scale Vertical Flow Reactor System into the Removal of Fe, As and Mn in Mine Drainage

국문 초록 (Abstract)

본 연구는 중성의 pH 조건에서 Fe, Mn, As이 포함된 복합오염수를 배출하는 광산배수의 수질특성을 모니터링하였다. 침출수를 처리하기 위해 모래와 석회석으로 이루어진 수직흐름반응조(VFR, Vertical Flow Reactor)와 제강슬래그와 석회석을 적용한 반응조(ZMR)로 구성된 현장파일럿 장치를 설치하여 약 6개월간 운영하였다. 광산배수 내 존재하는 Fe, Mn, As에 대한 현장파일럿 장치의 처리효율을 평가하였다. 중성의 알칼리 수질특성을 가진 D광산 침출수에 VFR와 ZMR 공정을 적용한 결과, pH와 알칼리도가 효과적으로 상승하여 Fe과 As가 99%이상 제거되었으며 Mn은 98%이상 제거하여 복합오염물질 처리가 가능함을 확인하였다. 본 연구결과를 통해 Fe, As, Mn이 포함된 소규모 광산배수에 자연정화기반의 공법이 적용가능함을 확인하였다.

다국어 초록 (Multilingual Abstract)

This study aimed to monitor a pilot-scale vertical flow reactor (VFR) system being operated in long-term for water quality control of pH-neutral mine drainage containing Fe, Mn and As, discharged in D mine site. The treatment systems of VFR and zero manganese reactor (ZMR) consisted of sand/limestone, and steel slag/limestone, respectively. The systems were operated during about six months in order to evaluate their long-term treatment efficiency It was observed that both pH and alkalinity of mine drainage were remarkably increased and more than 98% of Fe, As and Mn ions was continuously removed during the tested period of time. In conclusion, the field results of this work demonstrated that the vertical flow reactor system can effectively treat mine drainage contaminated by Fe, As and Mn.

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