Study of patterns of accumulation of the most dangerous ecotoxicants in wild medicinal plant raw materials of various ecotopes of the Voronezh region

Abstract

Voronezh region is one of the most important areas of agriculture and crop production. The purpose of the study was to study the patterns of accumulation of the most dangerous heavy metals in wild medicinal plant raw materials of various ecotopes of the Voronezh region. The accumulation of heavy metals (lead, mercury, cadmium, nickel, copper, zinc, cobalt, chromium) and arsenic was studied, using an example of 10 types of medicinal plant raw materials, which were produced in 51 ecotopes of the Voronezh region. When analyzing the average values of the accumulation coefficients of heavy metals and arsenic by all studied types of medicinal plant raw materials, it is possible to build up a series of decreases in the total average accumulation efficiency of the determined elements for these plants, which is as follows: zinc> copper > cadmium > cobalt > nickel > arsenic > chromium > lead > mercury. When analyzing the values of accumulation coefficients, rows of decreasing efficiency of accumulation of elements in all types of medicinal plant raw materials studied are constructed. A detailed analysis of the characteristics of the accumulation of heavy metals and arsenic from soils in medicinal plant raw materials showed the presence of aclose positive relationship between concentrations in soil and plants for most of the determined elements, which indicates the predominant contamination of plant raw materials through the soil.