Abstract
An availability test, a pH-dependent test and a Japanese leaching test were applied to untreated and phosphate treated fly ash from municipal solid waste melting facilities in order to determine the leaching potential and behavior of metals. The results of the leaching tests show that the treated fly ash had a lower leaching potential and releaserate of metals than untreated fly ash. XRD analysis revealed that chloropyromorphite (Pb5 (P04) 3Cl) was formed in the treated fly ash.