Pesticides of modern classes in the water and bottom sediments of the Don River
The Don River in the Rostov Region is almost entirely surrounded by agricultural land, where the use of chemical plant protection products is an integral part of the production cycle. By transferring with the air masses or seeping through the soil, pesticides can enter the water of the water bodies of fisheries importance, be deposited in bottom sediments, and negatively affect the vital activity of hydrobionts. The aim of the study was to detect in the habitat of hydrobionts (water and bottom sediments) of the Don River the content of 20 active ingredients of the pesticides of modern classes most widely used in agriculture in the region, the half-life of which can exceed six months. The study was conducted by high-performance liquid chromatography (HPLC). To prepare for chromatography, the extraction of pesticide active ingredients from the samples of water and bottom sediments was performed using dichloromethane, followed by drying with anhydrous sodium sulfate and purification of extracts using solid-phase extraction cartridges (if necessary). The identification of the active ingredients of pesticides was carried out by the retention time, and the quantitative determination was carried out by the method of absolute calibration. Standard samples of pesticide active ingredients were provided by Bayer AG. It was found that the concentrations of pesticide active ingredients in the living environment of hydrobionts in the Don River are by more than an order of magnitude lower than the established maximum allowable concentrations (MAC), which indicates the relative safety of the environment for hydrobionts.
| Main Authors: | , , |
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| Format: | Journal Contribution biblioteca |
| Language: | Russian |
| Published: |
2021
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| Subjects: | Habitats, Agriculture pollution, Maximum allowable concentrations, Среда обитания, Сельскохозяйственное загрязнение, Предельно допустимые концентрации, ASFA_2015::P::Pesticides, ASFA_2015::F::Freshwater pollution, ASFA_2015::F::Freshwater sedimentation, |
| Online Access: | http://hdl.handle.net/1834/41622 |
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| Summary: | The Don River in the Rostov Region is almost entirely surrounded by agricultural land, where the use of chemical plant protection products is an integral part of the production cycle. By transferring with the air masses or seeping through the soil, pesticides can enter the water of the water bodies of fisheries importance, be deposited in bottom sediments, and negatively affect the vital activity of hydrobionts. The aim of the study was to detect in the habitat of hydrobionts (water and bottom sediments) of the Don River the content of 20 active ingredients of the pesticides of modern classes most widely used in agriculture in the region, the half-life of which can exceed six months. The study was conducted by high-performance liquid chromatography (HPLC). To prepare for chromatography, the extraction of pesticide active ingredients from the samples of water and bottom sediments was performed using dichloromethane, followed by drying with anhydrous sodium sulfate and purification of extracts using solid-phase extraction cartridges (if necessary). The identification of the active ingredients of pesticides was carried out by the retention time, and the quantitative determination was carried out by the method of absolute calibration. Standard samples of pesticide active ingredients were provided by Bayer AG. It was found that the concentrations of pesticide active ingredients in the living environment of hydrobionts in the Don River are by more than an order of magnitude lower than the established maximum allowable concentrations (MAC), which indicates the relative safety of the environment for hydrobionts. |
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