광산배수처리를 위한 황산염환원균의 응용
Application of Sulfate-Reducing Bacteria for Treatment of Mine Drainages
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초록
황산염환원균은 황산염을 환원하여 황화수소를 생성하는 과정에서 에너지를 획득하는 편성혐기성세균이다. 황산염환원균에 의해 생성된 황화수소는 중금속과 반응하여 황화금속으로 침전하기 때문에 광산배수 중의 황산염과 중금속을 동시에 제거할 수 있는 세균으로서 주목을 받아왔다. 이 글에서는 황산염환원균을 이용한 광산배수 중의 중금속 제거에 미치는 pH, 중금속 이온, 기질, 온도, 황화수소의 농도, 반응기 등의 영향에 대하여 지금까지 발표된 연구결과들을 정리하고 고찰하였다.
Abstract
Sulfate-reducing bacteria(SRB) are obligate anaerobes and obtain energy from the process to reduce sulfates into sulfides. SRB have attracted interest in the treatment of acid mine drainage(AMD) because the biogenic sulfide reacts easily with heavy metal in solutions, and precipitates as metal sulfide. In the present article, the effects of pH, heavy metal ions, substrates, temperature, concentration of sulfides, types of reactor on the removal of heavy metal from mine drainage by SRB were summarized and discus sed.
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