Vol. 38, issue 09, article # 7

Abstract:

This work studies spatial distribution of accumulation levels of 21 compounds of polycyclic aromatic hydrocarbons (PAHs) in the snow cover of Baikal Natural Territory in winter 2021/2022. The highest PAHs concentrations were revealed in industrial cities of the Baikal Region (14–3400 mg/m²), and the lowest ones, on the lake ice in Northern Baikal basin (2.0–7.7 mg/m²). The local character of PAHs expansion near source of their emission is revealed. Total PAHs income onto Lake Baikal surface during winter 2021/2022 was 128.8 kg, high values were determined for phenanthrene, fluorantene, pyrene, benzo(b)fluorantene, benzo(k)-fluorantene. The spatial distribution, diagnostic ratios, and factor analysis of PAHs have revealed main sources of air pollution by this class of compounds during a cold year period, i.e. carbon and liquid fuel burning. We assessed the degree of snow cover pollution by coefficients of ecological risk (RQ) with a high contribution of benzo(b)fluorantene.

Keywords:

snow cover, PAHs, toxicity, emission sources

Figures:

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