Investigation of the binding of heavy metals in thermally treated residues from waste incineration

The use of thermal treatment (sintering, vitrification) enables the inertization of heavy metals in residues of waste against leaching. In this work thermally treated fly ash is leached in a six step sequential extraction procedure that enables the description of the binding and with that of the inertization of heavy metals. It is shown that, regarding the energetic factor, sintering at high temperatures could be the more convenient way to inert fly ash against leaching of heavy metal compounds.