Abstract
Abstract The leachability of metals from fly ash produced by a coal‐fired electric plant and a municipal waste incinerator under acidic conditions was experimentally investigated. The results of these column‐leaching experiments show that a decrease in the pH of the leachant favors the extraction of metal ions from solid particles of both coal combustion fly ash and municipal waste incinerator fly ash. The significant increase in the extraction of cadmium, chromium, zinc, lead, mercury, and silver ions from the ash is attributed to the instability of the mineral phases that contain these metals under acidic conditions.
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