Evaluation of the roadside soil of the P72 highway by the content of heavy metals and arsenic

Abstract

Introduction. The paper presents studies on the assessment of the level of pollution by motor vehicles of the soil of the roadside territory of the new section of the reconstructed highway. Materials and methods. The object of the study was the soil of the roadside territory of the new section of the highway of regional significance “Vladimir-Murom-Arzamas” (P72). The registration number in the territory of the Vladimir region is 17P-1. Results. It was found that with the launch of a new section of the reconstructed highway, the roadside area was found to be significantly contaminated with heavy metals and arsenic due to the impact of gas-air emissions of passing vehicles. Gas-air emissions of motor vehicles increase the content of technogenic magnetite particles in the soil, which increase the magnitude of the magnetic susceptibility of soils. Aggregation of heavy metals (HM) by magnetite particles and their sorption contributes to the accumulation of hm in the soil of the roadside area. When moving away from the highway, the content of heavy metals and arsenic in the soil of the roadside area decreases. The indicator of accumulation of HM and arsenic in the soil of the roadside area increases in the series: Zn → Ni → As → Cu → Pb. By the end of the year of operation of the new section of the reconstructed highway, the excess of the MPC for lead and arsenic was revealed, and the content of Zn and Cu in the roadside soil is close to the values of the MPC. Limitations. The limitations of the study are related to the remoteness of sampling points relative to the roadway and a small number of reference sites, which limits the possibilities of a broader interpretation of the data obtained. Conclusion. To prevent the current dangerous trend, it is necessary to manage sanitary and hygienic monitoring of the soil of the roadside area exposed to constant exposure and accumulation of HM, in order to detect exceedances of the MPC and UEC and take measures to protect these territories.