Accumulation of heavy metals in sediments and vegetative organs of Carex rostrata Stokes filtration fields

This article discusses the pollution of bottom sediments and vegetative organs of Carex rostrata Stokes filtration fields with heavy metals. The methods and pathways of pollutants entering bottom sediments, as well as the features of their accumulation in the vegetative organs of plants, are described. The content of heavy metals in the studied objects was determined using a spectrophotometer. The coefficient of biological absorption was used to assess the intensity of accumulation of heavy metals by plants. The paper presents the results of comparing the pollution of bottom sediments with heavy metals in comparison with the clarke value and freshwater bottom sediments. Absorption intensity series were constructed based on the calculated coefficients of biological absorption. The content of heavy metals was studied in the filtration fields of the Nizhnetavdinsky District and the Omutinsky District of the Tyumen Region. The studies showed that in these areas there is an increased content of a number of heavy metals in bottom sediments, the main elements of which are iron and manganese. With an increase in the content of heavy metals (iron, cobalt and manganese) in bottom sediments, the intensity of their absorption by plants decreased. The data obtained can serve as a basis for further monitoring of the state of bottom sediments and vegetation in the context of assessing the environmental safety and sustainability of ecosystems.