Ivanchenkova O. A. (Bryansk state engineering-technological University, Bryansk)
Lukashov S. V. (Bryansk State University named after аcad. I. G. Petrovskogo, Bryansk)
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This work is devoted to determining the coefficient of bottom accumulation of heavy metals in small reservoirs exposed to anthropogenic impact. The analysis of the literature data on the features of lead accumulation in bottom sediments and typical compounds in which it is localized in the water-sludge system is carried out. The method of inversion-voltammetric determination of heavy metals in natural waters and bottom sediments has been optimized. A small reservoir of recreational use in the Bryansk region of the Bryansk region was surveyed. The experimentally obtained values of lead concentrations were compared with the maximum permissible concentrations in accordance with SanPiN 1.2.3685-21 (MPC for Pb2+ is 0.01 mg/l). A significant excess of the maximum permissible concentration of lead in lake water was found during the 2021-2022 seasons. During the 2023 seasons, there was a sharp decrease in the concentration of lead in water. In order to study the process of sedimentation self-purification of the reservoir, the dynamics of the coefficient of bottom accumulation of lead over a three-year period was determined. The study of the trend of KDA changes depending on the concentration of lead in lake water during 12 observation seasons showed a relatively high degree of statistical reliability of this dependence (coefficient of determination R2 = 0.6833). The results of the research allow us to conclude that the intensity of sedimentation self-purification of lake water from lead is ensured due to the sorption capacity of bottom sediments. In terms of further research, it is of interest to study the sorption of lead ions on bottom sediments, as well as methods for converting soluble lead compounds into sediments. The data obtained in the course of work can be used as a basis for the development of methods for the restoration of small reservoirs contaminated with lead.
Keywords:bottom accumulation coefficient, lead, small reservoirs, heavy metals, inversion voltammetry, sedimentation self-purification, bottom sediments.
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Citation link:
Ivanchenkova O. A., Lukashov S. V. INVESTIGATION OF THE DYNAMICS OF BOTTOM ACCUMULATION OF LEAD IN SMALL RESERVOIRS // Современная наука: актуальные проблемы теории и практики. Серия: Естественные и Технические Науки. -2024. -№12/2. -С. 14-20 DOI 10.37882/2223-2966.2024.12-2.07 |
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