Abstract
The distribution of integral indicators of contamination of components of the soil-plant system with polycyclic aromatic hydrocarbons in the urban area is considered. The object of study is an anthropogenically modified natural complex of the RUDN University campus and the adjacent South-Western Forest Park (Moscow), including soils (Albic Retisols (Ochric)) and common plant species. The main pollution source is traffic load. Emissions from five sections of roads surrounding and crossing the territory form a specific picture of the distribution of pollutants, which is demonstrated by the example of marker compounds – polycyclic aromatic hydrocarbons. As an approximate safe level of contamination of soils and vegetation, background concentrations of individual polyarenes in environments, determined by the method of dynamic phase portraits, were calculated. A local redistribution of contamination zones was revealed during the migration of polyarenes from snow into soils, then into root systems and above-ground parts of vegetation. The proposed methodological approach, based on the use of integral indicators, allows us to assess the degree of damage to ecosystems by a complex of priority pollutants.