Koziy Y. Toxic and potentially toxic elements in coal seams of Pavlohrad - Petropavlivka area.

The thesis concerns the analysis of features and determination of regularities in the distribution of toxic and potentially toxic elements (further TPTEs) in coal seams of Pavlohrad - Petropavlivka geological and industrial area of Donbas. According to the results of the research, regularities of distribution of TPTEs among organic and mineral components as well as among the basic fractions of the mineral part of the coal seams of Pavlohrad - Petropavlivka geological and industrial area have determined; moreover, and the "range of affinity" of the elements have identified for the organic part of the coal seams as well as for sulfide, silicate and carbonate fractions of the mineral part of the coal seams within the area. For the first time, composition of geochemical associations of TPTEs for the basic working seams in certain mines and in the region in general, has been defined. To identify the features of the spatial distribution of TPTEs within the basic working coal seams at the sites of the operating mines of the Pavlohrad-Petropavlivka geological and industrial area, forecast maps of the TPTEs spreading have been were generated. They are the basis for the long-term forecast of TPTEs concentrations in mined rock from mines and aimed at minimizing environmental damage from the activities of mining companies as well as companies of heat power industry. For the first time, the classification of the main coal seams according to the content of TPTEs has been developed. Keywords: toxic and potentially toxic elements, geochemical associations, organic and mineral composition of coal seams, fractions of the mineral part of coal seams, fractured zone.