Analysis and leaching experiment of slag produced by an arc plasma treatment of fly ash

摘要

A fly ash treatment is accompanied by the emission of hazardous elements. For mitigating the emission and reducing the volume of fly ash, we have conducted an arc plasma treatment. The elements in both fly ash and slag prepared by an arc plasma treatment were determined by inductively coupled plasma atomic emission spectrometry and mass spectrometry (ICP-AES/ MS), and compared to each other. It was found that hazardous elements, such as Sb, As, Cd, Pb and Se, were concentrated in fly ash. Because these elements are volatile (chalcophile and siderophile elements), it is considered that they are vaporized during the arc plasma treatment.