ASSESSMENT OF SOIL POLLUTION IN KHABAROVSK BENZ(A)PYRENE

Introduction. In cities with developed industry and infrastructure, the problem of pollution with supertoxicants, including benz(a)pyrene (BP), is relevant. In most of the analyzed works, there is an excess of regulatory requirements for the content of BP in the soils of urban areas. There is no information in the literature about BP contamination of soils in the cities of the Khabarovsk Territory. Background. Assessment of the level of contamination of benz(a)pyrene functional zones of Khabarovsk. Objects and methods. The content of benz(a)pyrene in the surface layer of the soil of industrial, agricultural and residential zones of Khabarovsk was studied using a liquid chromatograph "Waters HPLC 2475". 78 samples were examined, a significant part of which was taken in residential (38 samples) and industrial (34 samples) zones. Assessment of compliance with permissible standards and determination of the degree of contamination of the studied soils were carried out in accordance with SanPiN 2.1.3684-21 and SanPiN 1.2.3685-21. Results. It was found that 62.8% of all the samples studied have the category "clean", while 35.9% of the samples were not contaminated. The share of samples with the category: acceptable was 12.8%, dangerous - 11.5%, extremely dangerous - 9%. The most polluted functional zone is residential buildings, since it is located along the perimeter of production zones and, directly, the largest stationary sources of emissions falling into their dispersion zones. Almost all soil sampling points in which the content of benz(a)pyrene exceeds 5 MPC (maximum permissible concentrations) are located in the zones of influence of Khabarovsk CHP No. 2 and Khabarovsk Oil Refinery. Conclusions. The current situation is due to the imperfection of urban planning solutions that do not take into account the aerogenic introduction of pollutants and their accumulation in the soils of the residential area.