MONITORING STUDIES OF A LARGE URBAN ECOSYSTEM SOILS BY ECOLOGICAL AND ANALYTICAL AND BIOINDICATIVE METHODS
2017
Krotova, L.V. | Аnischenko, L.N.
the data of the current impact soil monitoring in a large urban ecosystem – Bryansk – on the gross content of the heavy metal group elements (HME) in them are presented and discussed. The indices of the concentration of heavy metals in urban areas were revealed, the range of their contents was reflected, comparisons were made with the approximate permissible and maximum permissible concentration, clarks. The entire territory of the urban ecosystem is a vast geochemical zone with a high concentration of pollutants, irrespective of functional affiliation. The highest content of heavy metals was recorded in urban roadside belt-like lawns, as well as some innercity territories of residential areas (Bezhitsky district): an increase in the concentrations of five priority substances – lead, chromium, cobalt, nickel, arsenic was revealed. The gross concentrations of heavy metals in urban areas exceed the MAC for lead (slightly), copper and nickel (average excess), for zinc (significant). The content of manganese is below the MPC. The complex soil state index (Zс) is calculated: it reflects the total gross content of heavy metals in urban areas and can serve as the basis for ecological mapping. In natural-technogenic soils with a high Zc index, an increased concentration of strontium, lead, cobalt and nickel is observed. Practical recommendations for organizing chemical contamination of soils with heavy metals were formulated.
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