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The soil cover plays an important role in the pollutants accumulation. Heavy metals are a specific group of toxic substances. The main sources of their entry into the soil are man-made (mining and processing of minerals, emissions from industrial enterprises, fuel combustion, agriculture). The soil cover technogenic pollution is important environmental problem that arises on the territory of Russia. The research aim is to give an ecological assessment of the soil cover technogenic pollution with heavy metals. The research tasks included: to determine the regularities of the heavy metals content in the soils of long-term observation points and background areas; to reveal the excess of the studied elements background concentrations; analyze the soil pollution total indicator. In 2015-2019 the heavy metals content in the soil at the long-term observations points varied from 0.2 mg/kg (Cd - 2019) to 427.0 mg/kg (Mn - 2017), in the background plots soils from 0.2 mg/kg (Cd - 2016).) up to 404.0 (Mn –2015) and did not exceed the maximum permissible concentrations. An excess of the aluminum content regional background level was noted, the minimum excess was 1.6 F, the maximum - 7.2 F. In addition, an excess of the background value of the following elements was noted: manganese (1.1-1.3 F), lead (0.01-1.1 F), copper (0.05-1.7 F), nickel (1.06-2.1 F) and zinc (1.01-1.4 F). In general, the soil pollution total indicator varied from 1.0 to 7.1, which corresponds to a non-hazardous pollution with a possible impact on the health of the population. [ABSTRACT FROM AUTHOR]

The soil cover acts as significant factor influencing the processes in the biosphere, due to the pollutants absorption and fixation. The fluorine and its compounds practical use in economy, as well as its entry into the environment with industrial enterprises emissions, effluents and wastes leads to its accumulation in ecosystems. The research purpose is to analyze soil contamination with fluorine compounds in the Samara region. The studies were carried out on the territory located at a distance of 0.5 and 5 km from the Samara Metallurgical Plant and at the background sites in 2009-2019. The Samara region soil contamination determination with water-soluble fluorine compounds showed that at the site located 0.5 km from «Arkonik SMZ» the maximum content was detected in 2019 and amounted to 4.1 mg/kg, at the site located 5 km away in 2009 - 3.0 mg/kg. In the background plots soil, the fluorine compounds maximum content was noted in 2019. In 2009-2019 the water-soluble fluorine compounds content in the studied soils did not exceed the maximum permissible concentrations. A background values excess was noted in the long-term observations plots, the soil contained 1.8-8.2 F, in the background plots soils - 1.4-8.2 F. [ABSTRACT FROM AUTHOR]