The purpose of this study was to develop a method for estimating the chemical forms of heavy metals contained in chelated general waste incineration fly ash by correlation analysis of elemental distribution by SEM-EDX. Morphological analysis was also attempted. By subjecting incinerated fly ash to elution tests with different extraction capacities, it became possible to observe heavy metals present on the insoluble or poorly soluble internal matrix. As a result of Ti chemical morphology analysis by correlation analysis, crystalline Ti in the incineration fly ash was assumed to be either rutile (TiO 2 ) or perovskite (CaTiO 3 ) and mixed in the aluminosilicate matrix. On the other hand, as amorphous Ti, a form of bonding with aluminosilicic acid was also speculated. The method of this study has the advantage of being able to estimate the chemical forms of heavy metals, which are difficult to identify by XRD analysis, at the particle level.
|Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)
|Published - 1 Jan 2017