GEOECOLOGICAL ASSESSMENT OF THE CURRENT CHROMIUM CONTENT IN THE URBANIZED SOILS OF THE SOUTH OF RUSSIA

Abstract

On the territory of the city, the soil cover is exposed to significant anthropogenic and technogenic impacts, which contribute to the development of a number of negative processes of soil degradation. One of these processes is the process of soil pollution with heavy metals, which have high biochemical activity and toxicity. Heavy metals are able to accumulate in the components of the environment, including in the body of living beings, having a negative effect on their condition. A great danger to humans and the environment arises when the content of pollutants belonging to the group of heavy metals exceeds the maximum permissible concentration in the soil of an urbanized area. The presence of a large number of sources of anthropogenic and technogenic impact on the environment of the urban area contributes to the development of the process of soil pollution with heavy metals. One of the main chemical elements-pollutants of urban soil belonging to the group of heavy metals is chromium (Chromium, Cr). The paper describes the results of a study conducted in 2020 on the current chromium content in the soil of the city of Astrakhan. The relevance of the work lies in the geochemical analysis of the current content of heavy metals in the soil of the city of Astrakhan. The aim of the work was to study the chromium content in the soil of the city of Astrakhan and its participation in the process of soil pollution. The work was based on the task of determining the degree of exceeding the hygienic standards of the maximum permissible concentration of chromium in soil samples. Methods of ecological and geographical research were used in the work, soil samples were collected, followed by determination in a certified laboratory of the concentration of a substance in each of the soil samples. In the course of the work, indicators of exceeding the maximum permissible concentration of chromium in the soil of Astrakhan were determined and the main sources of input into the environment were identified.