Chemistry and Toxicity of Bottom Sediments in Small Watercourses of St. Petersburg
| Autor: | V. V. Spasskii, E. S. Mitrofanova, M. G. Opekunova, N. A. Sheinerman, A. V. Chernyshova, A. Yu. Opekunov |
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| Rok vydání: | 2020 |
| Předmět: |
Total organic carbon
010504 meteorology & atmospheric sciences Chemistry Potential risk 0208 environmental biotechnology St petersburg Sediment Heavy metals 02 engineering and technology 01 natural sciences 020801 environmental engineering Wastewater Environmental chemistry Toxicity Bioassay 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Water Resources. 47:282-293 |
| ISSN: | 1608-344X 0097-8078 |
| Popis: | The article gives the results of integrated studies of bottom sediments in four watercourses in the central St. Petersburg: the rivers of Ekateringofka, Okhta, Fontanka, and Chernaya Rechka. The river sediments are shown to be highly polluted by heavy metals and polycyclic aromatic hydrocarbons. Bioassay tests are used to show a considerable toxicity of sediments with elements of HM group (Ni, Zn, Cu, Cr, Mn, Cd) with a high probability of biological effects. However, studies by correlation and regression analysis have not demonstrated the contribution of polyarenes to the formation of sediment toxicity. This result is in agreement with estimates of sediment toxicity by PAH concentration converted to total organic carbon, and by characteristics of potential risk of biological effects TEC (Threshold Effects Concentrations), MEC (Median Effects Concentrations) and EEC (Extreme Effects Concentrations). Among the examined watercourses, of greatest hazard are the sediments of the Chernaya Rechka and Ol’khovka, especially, near wastewater discharge sites of plants of chemical (paint and varnish) industry and accumulator battery production. |
| Databáze: | OpenAIRE |
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