광산배수 자연정화시설내 슬러지를 이용한 미세 자철석 합성 예비 연구
A Preliminary Study on Fine Magnetite Synthesis with Sludge in Passive Mine Water Treatment System
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초록
본 연구는 광산배수 자연정화시설 슬러지가 자철석 합성 재료에 활용 될 수 있음을 밝혔다. 슬러지를용해하여 3가철 용액을 제조하고 2가철 원을 공급하여 pH 9.5로 조정한 결과 미세한 자철석이 합성되었다. 자철석의 자력 모멘텀은 33.0 emu/g 로 시약 자철석의 54% 였다. 이는 합성시 공침된 침철석(goethite) 등의 수반으로자화 모멘텀이 낮아진 것으로 판단된다. 자철석은 개별 입자들의 뭉침으로 수μm 크기로 측정된다. 본 연구는광산배수 슬러지 처분문제와 소재로의 활용처를 제시했다는 점이 의미가 있다고 판단한다.
Abstract
This study was carried out for sludge recycling in passive mine drainage treatment systems to be utilized for magnetite synthesis. Ferric iron recovered from the sludge via dissolution was used as feed stock to synthesize magnetite particles by coprecipitation of ferric and ferrous iron at the pH 9.5. Magnetic momentum of magnetite produced was 33.0 emu/g corresponding to 54% of reagent magnetite. It may be attributable to partial incorporation of byproduct like goethite. Although the size of magnetite was about several μm due to the aggregation of magnetite particles, the individual size of magnetite particle could be much smaller like nanoparticles. The result of this study shows promise of simultaneous reduction of sludge waste and production of valuable resources.
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