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1 Journal of Sustainable Mining

1 2025

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Magnetic and optical properties of airborne dust particles nearby coal-fifired power plants in Upper Silesia, Poland: a mineralogical petrographical and chemical approach

Chrysakopoulou Chrysoula, Perleros Konstantinos, Wojtaszek-Kalaitzidi Małgorzata, Papadopoulou Lambrini, Kantiranis Nikolaos, Kalaitzidis Stavros

Journal of Sustainable Mining

2025

Vol. 24, iss. 2

320--332

Coal mining and exploitation pose certain challenges in terms of environmental management. The objective of this research is the study of airborne dust from Knurow region, Southern Poland, aiming identify the level and the features of anthropogenic particles, mostly in the form of fly ash. Two samples collected from a domestic gutter system were analysed regarding their mineralogical, chemical and petrographical features, emphasizing the magnetic fraction and the carbonized organic particles. The airborne dust contains 22 wt.% of fossil and fresh organic matter, whereas the major mineralogical phase is magnetite. The magnetic fraction (up to 3 wt.%) appears in the form of spheres of simple or complex surface structure, while their average size is 12.7 and 15.8 μm in the studied samples. Lithogenic magnetite is totally absent. The magnetic spheres consist mainly of Fe, whereas Al, Si, Mg and Mn participate in minor amounts. Unburnt coal particles, along with chars, sooty and coke particles, were identified, accounting for 80 vol.% on a mineral matter-free basis, with fresh residues of immature organic matter accounting for the remaining 20 vol.%. Anthropogenic activities in the study area point out a significant environmental footprint to the urban site of the Knurow region.