Treatment of Acid-Mine Water with Calcite and Quartz Sand

摘要

This study investigates interactions between a typical acid-mine water and a solid mixture of cal- cite and quartz. In this solid mixture, calcite provides a source of alkalinity whereas quartz surfaces become preferable place for precipitation of produced oxides. The results indicate that neutraliza- ton by calcite dissolution is critical for extensive immobilization of metals from these waters. As pH increases, ferrihydrite, amorphous Al(OH)_3, Cu(OH)_2, and possibly Zn(OH)_2 precipitate that decreases the aqueous concentrations of Fe, Al, and Zn.