РЕЗУЛЬТАТЫ МОНИТОРИНГА СОДЕРЖАНИЯ ТЯЖЕЛЫХ МЕТАЛЛОВ В ПОЧВЕ, РАСТЕНИЯХ И СНЕЖНОМ ПОКРОВЕ ВБЛИЗИ АВТОМОБИЛЬНЫХ ТРАСС НА РАЗЛИЧНОМ УДАЛЕНИИ ОТ ГОРОДА УЛЬЯНОВСКА

Abstract

Studies to study the contamination of agricultural landscapes with heavy metals were carried out in Ulyanovsk region. The materials for the research were soils, plants and snow cover, sampling of which was carried out near highways in different directions and distances (5 km, 10 km and 15 km) from the city of Ulyanovsk. In the east direction from the city, a pattern of increasing the content of Zn, Cu, Pb, Cd, Ni in the soil (gross and mobile form), plants and snow cover was traced. In soil samples, Zn was the most mobile, the amount of which (mobile form) varied from 7.0 to 10.7 mg/kg, the content of mobile compounds Cu, Pb, Cd, Ni did not change significantly. In 5 km (east of Ulyanovsk), the maximum values for the content of heavy metals in plants were found for Zn – 27.8 mg/kg; Cu – 18.9 mg/kg; Pb – 0.62 mg/kg; Cd – 0.30 mg/kg, Ni – 0.87mg/kg of dry matter, there was no excess of MDU it was established in none of the observation sites. A direct dependence of the cadmium content in plants on its content in soils was noted, with an increase in the content in the soil (5.9 mg/kg), its content in plants increased to 0.30 mg/kg. The content of Zn, Cu, Ni at all snow collection points is significantly lower than the MPC. The excess of the MPC was recorded at almost all sampling points in terms of Pb and Cd content by 2.0...7.0 times.