Transformation of Urbanozems in the Areas of Gas Stations
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Vyatka State University, Krasnoarmeyskaya Str. 26, Kirov, 610001, Kirov region, Russia
Anna Sergeewna Olkova   

Vyatka State University, Krasnoarmeyskaya Str. 26, Kirov, 610001, Kirov region, Russia
Publication date: 2021-05-01
Ecol. Eng. Environ. Technol. 2021; 3:51–58
Areas near gas stations are places of local specific environmental pollution. The purpose of this work is to study the environmental consequences of gas station functioning for surrounding soils (urbanozems). We determined the content of oil products (OP), bulk and mobile forms of heavy metals, acute toxicity (Ceriodaphnia affinis Lillieborg, Раramecium caudatum Ehrenberg, Escherichia coli Migula), chronic toxicity (C. affinis), and the state of soil microphotrophs. The content of OP was from 520±130 to 4820±100 mg/kg, which is significantly higher than the concentrations of OP in the soils of the transport zone of cities. The excess of the Russian standards for HM was found only for zinc (the maximum for the total form – 1.7 MPC, for the mobile form – 1.4 MPC). Urbanozems samples did not have acute toxicity; however, chronic toxicity in the bioassay for the mortality of C. affinis (up to 85%) and a decrease in the fertility of crustaceans (2-3 times compared to the control) were observed. In the structure of the community of soil microphototrophs, cyanobacteria dominated both in biomass and in abundance: (up to 748±10 thousand cells/1 g of soil) compared with green and diatoms (1.1–5.5 and 1.2–19,8 thousand cells/1 g of soil respectively). As a result of the work, we concluded that the quantitative algological analysis and biotest with the assessment of chronic toxicity in terms of mortality and fertility of C affinis for the diagnosis of local soil contamination in the areas of gas stations were of the highest informative value.