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자연정화 슬래그반응조 및 Active 처리시설에서의 광산배수 내 망가니즈 저감: 처리시설 설계를 위한 제언

Removal of Manganese from Mine Drainages by the Passive Slag Reactor and Active Treatment System: Proposals for the Design of Treatment Facilities

김덕민
한국자원공학회 (The Korean Society of Mineral and Energy Resources Engineers)|2021.06|한국자원공학회지 (Journal of the Korean Society of Mineral and Energy Resources Engineers)|제58권 제3호|pp. 249-257

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참고문헌

키워드

ManganeseDesign factor망가니즈슬래그반응조공침 및 흡착설계 인자Slag reactorCoprecipitation and sorption
주제분류자원공학

초록

망가니즈는 국내 광산배수에서 철에 이어 두 번째로 배출허용기준을 많이 초과하는 원소이나, 자연정화하기 어려워 그간 active 시설에서 처리해 왔다. 망가니즈 제거용 자연정화시설인 슬래그반응조가 도입 단계에 있으며, 이의 설계 인자들에 대하여 관련된 연구들로부터 제안하였다. 설계 인자는 필요 수위차, 매질 구성, 처리효율 변화, 그리고 체류시간을 포함한다. 또한, 기존의 active 처리시설에서 망가니즈가 철 및 알루미늄에 의해 공침 및 흡착 기작으로 제거되므로 처리를 위해 필요한 pH가 낮아지는데, pH 재조정조의 반영 여부 등을 판단해 효율적인 active 처리시설을 설계하기위하여 Fe, Al 및 Mn 농도로부터 처리 pH를 추정하는 관계도 관련 연구로부터 제안하였다.

Abstract

Although Mn frequently exceeds the effluent standard in South Korea, only active treatment facilities were applied to remove Mn because it was difficult to be removed by passive treatment. Because a slag reactor that removes Mn by passive treatment is being designed, design factors were proposed by relevant studies. The factors include differences in hydraulic head, the composition of substrate, variations in treatment efficiency, and the residence time. Moreover , the required pH decreases by the coprecipitation and sorption of Mn by Fe and Al hydroxides in active treatment facilities. To design efficient active treatment facilities considering the necessity of a pH readjustment tank, a relationship between the required pH and the concentrations of Fe, Al, and Mn was also proposed from relevant studies.

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