DETERMINATION OF CHEMICAL-SPECIES OF SELECTED TRACE-ELEMENTS IN FLY-ASH

Complex analytical methods have been developed for determining the che mical composition of fly ashes. Samples were collected at coal-fired p ower plants and municipal waste incinerators. Morphological investigat ions and single particle analysis were performed by SEM/EDAX method. A survey of mineralogical phases was made by X-ray powder diffraction a nd infrared spectrometry. Solvent-leaching experiments were carried ou t for the information on the mobility of metal pollutants under real e nvironmental conditions. Copper, Ni, Co, Cr, Pb and Cd have been studi ed, and of the toxic metals, Cd has been found in exchangeable forms i n a great amount. Mobile species of toxic metals may have an impact on the quality of receiving waters or on organisms in soils.