Insights into the Chemical Characteristics of Atmospheric Aerosols from Urban-Industrial and Rural Sites in South-East of Poland During Winter

This study focusses on a short-term characterisation of atmospheric aerosols from three locations in southeast of Poland with different land use characteristics, population density and sources of pollution (Katowice: urban-industrial; Strzyżowice near Lublin: rural; Kielce: urban). Twenty-four hour PM_2.5 and PM₁₀ samples were collected on the quartz filter and their chemical compositions were monitored and measured using OCEC thermo-optical analysis and scanning electron microscopy-energy dispersive X-ray spectrometry (SEM-EDS). The highest concentrations of PM_2.5 and PM₁₀ were measured at the urban-industrial area in Katowice (29.6 µg ∙ m⁻³ and 31.0 µg ∙ m⁻³, respectively), whereas the highest organic carbon (OC) and elemental carbon (EC) levels were observed at the Kielce urban site (23.3 ± 4.2 µg and 3.6 ± 0.3 µg, respectively). The lowest values were obtained at the rural site for PM_2.5 (10.4 ± 2.7 µg ∙ m⁻³) and PM₁₀ (11.8 ± 2.7 µg ∙ m⁻³) and for OC (17.8 ± 1.6 µg) and EC (1.0 ± 0.1 µg). SEM-EDS analysis of samples from Kielce allows identification of internal chemical mixtures of carbon, silicon, calcium, chlorine, sodium and aluminium.