Abstract
A comparative assessment of soil pollution in urbanized centers of the Baikal region is given. It is based on statistical information, cartographic materials, and data of soil and geochemical surveys performed by the authors in 2012–2019. Soil samples characterize the central cities of Irkutsk oblast, the Republic of Buryatia, and Mongolia (Irkutsk, Ulan-Ude, Ulaanbaatar, etc.), as well as adjacent areas. It is shown that soils of Irkutsk are the most polluted (the total pollution index Zc = 4–63) because of the huge anthropogenic load and relatively high sorption capacity of soils. The main sources of pollution include petrochemical and metallurgical enterprises, thermal power plant, boiler facilities, and vehicles. Increased contents of toxic substances exceeding the background level typical of soils located along the predominant wind direction and along the Angara River valley. The lowest degree of soil contamination (Zc = 2–23) is in Ulaanbaatar despite the large anthropogenic load because of the greatest population and emissions of the thermal power plants, transport enterprises, repair workshops, and vehicles. This is related to the coarse soil texture and low sorption capacity, so that the pollutants migrate to the surface water bodies and groundwater. Soils of Ulan-Ude are characterized by the moderate to low contamination (Zc = 5–24). Contaminated soils are mainly localized near thermal power plants, boiler facilities, industrial enterprises, roads, and railways.
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This study was performed within the framework of state assignment (registration nos. АААА-А21-121012190055-7 and АААА-А19-119080700040-8) and supported by the Russian Foundation for Basic Research, projects nos. 19-55-44020Mong_t and18-45-030039.
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Belozertseva, I.A., Vorobyeva, I.B., Sorokovoi, A.A. et al. Soil Pollution in Urbanized Centers of Baikal Region. Eurasian Soil Sc. 55, 102–114 (2022). https://doi.org/10.1134/S1064229322010033
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DOI: https://doi.org/10.1134/S1064229322010033