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The analytical results for the concentration of about 50 elements in magnetic fractions, obtained by wet low intensity magnetic separation of fly ashes from six coal burning power plants in Bulgaria, have been compared to the data previously reported [1] for the initial fly ashes. It has been found that the total content of heavy and toxic elements in magnetic fractions is lower than that in the source materials. The concentrations of Cr, Mn, Co, Ni, and, in some ashes, of V and Cu are almost proportional to the c...

A comparative study of the content of five macro- and about fifty micro- and trace elements in fly ashes from six coal-burning power plants in Bulgaria is carried out by means of a combination of Chemical Analysis, AAS, X-Ray Luminescence and X-Ray Fluorescence EDA. The elements’ distribution among and within single particles is investigated on the base of the comparison of data from bulk analysis, micro-analysis, and the results from acid leaching tests using 0.1M HNO3. It is established that many heavy metals ...