218 焼却残渣における微量元素の化合物形態解析

抄録

The chemical states of Pb, Cu, Zn contained in bottom ash or fly ash from MSWI (Municipal Solid Waste Incineration), as trace elements, were investigated using X-ray absorption fine structure (XAFS). As to bottom ash, it was suggested that Pb and Cu in the ash mainly exist as oxide (II) state. It was also thought that the chemical state for a part of Cu is oxide (I). On the other hand, Zn in the ash was thought to exist as mixture of other chemical states except for oxide (II), despite recognizing the existence of oxide (II) in part. As to fly ash, Pb, Cu, Zn in the ash were thought to exist mainly as oxide (II). It was also suggested that a part of Cu and Zn would be chloride.