Leaching behavior of lead from hydrothermal solidified fly ash of incinerated municipal waste

Abstract

In order to clarify the possibility of the lead fixation by hydrothermal processing, the effect of hydrothermal processing time and temperature on the amount of lead dissolved from fly ash was investigated. The amount of lead dissolved from autoclaved bodies decreased with the increase in processing time and temperature. The lead in specimens was hardly leached during hydrothermal processing. These results suggested the possibility of the lead fixation by hydrothermal processing. The mineral contributed lead fixation was identified by SEM-WDX.