탄산화법을 이용한 광산배수 처리 기초연구 = A Fundamental Study on Treatment of Mine Drainage using Carbonation Process

다국어 초록 (Multilingual Abstract)

This study has been carried out in order to treat mine drainage from abandoned mine using carbonation process, one of the calcium carbonate precipitating methods. Carbonation treatment of mine drainage were conducted with the 500 ml of artificial mine drainage added 0.795 g of Hydrated lime in various experimental conditions of stirring speed (100, 200, 300 rpm) and CO2 injection rate (0.5, 1, 2 L/min). Results of carbonation treatment were compared with those of neutralization treatment without CO2 injection. While neutralization treatment showed generally an efficient removal of heavy metals, carbonation treatment resulted in total removal of Al and Cu, an efficient removal of Fe and Zn in some conditions, and an inefficient removal of Mn and Mg. Precipitates identified by XRD and SEM-EDS were calcite in the carbonation treatment, and amorphous or gypsum in the neutralization treatment.

국문 초록 (Abstract)

침강성 탄산칼슘을 제조하는 방법의 하나인 탄산화법을 이용하여 휴･폐광산으로부터 배출되는 광산배수를 처리하고자 연구를 수행하였다. 광산배수의 탄산화처리는 500 ml의 인공광산배수에 소석회 포화농도 0.795g을 투입하고 교반속도(100, 200, 300 rpm)와 CO2 주입량(0.5, 1, 2 L/min)을 달리하여 실시하고, CO2를 주입하지 않은 중화처리의 결과와 비교 분석하였다. 실험결과 중화처리는 전체적으로 중금속의 제거가 효율적인 것으로 나타났으나, 탄산화처리는 Al, Cu만 100% 제거가 가능하였고, Fe, Zn는 일부조건에서 제거가 가능하였으며, Mn, Mg는 처리에 다소 비효율적인 것으로 나타났다. 침전물을 대상으로 XRD, SEM-EDS 분석을 실시한 결과 탄산화처리 침전물은 방해석으로 중화처리 침전물은 비정질 또는 석고로 확인되었다.

참고문헌 (Reference)

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