초록

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Abstract ▼ AI-Helper

In order to evaluate the applicability of steel mill slag as a AMD (Acid Mine Drainage) neutralizer and to compare capacity of slag with that of limestone lab scale experiments were conducted. The fixed treatment experiments of AMD with slag and limestone separately for 24 hours under the stagnant c...

In order to evaluate the applicability of steel mill slag as a AMD (Acid Mine Drainage) neutralizer and to compare capacity of slag with that of limestone lab scale experiments were conducted. The fixed treatment experiments of AMD with slag and limestone separately for 24 hours under the stagnant condition showed that slag has higher capacity of pH increase and removal of Fe. Al and other trace elements. During the 10 days continuous step experiment the pH has been maintained and any decrease in the removal capacity of Fe and Al has not bun observed. In the trace element removal experiment slag showed higher capacity for removal of Ni, Co. Cu and Zn than limestone. The removal of trace element was more effective in AMD than in distilled water that the pH was adjusted to the same level of AMD (synthetic acid solution). It means that Fe and Al in AMD adsorbed trace elements during or after precipitation as oxide forms. In the size effect experiment, the slag of the smaller size with larger specific surface area exhibited higher capacity of pH increase and removal efficiencies of Fe. Al and other trace elements.