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Accumulation of pollutants by bottom sediments in the Dvina Gulf of the White Sea

Published in «Water: chemistry and ecology» № 10 / 2017 , p. 3-10.
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Klimovskii N.V.
Novoselov A.P.
Chernova V.G.
Petrakova I.V.

Summary:
Investigations have been carried out to determine the intensity of accumulation of pollutants by bottom sediments in the Dvina Gulf of the White Sea. Analysis of the data obtained showed that the highest concentrations of pollutants, such as petroleum hydrocarbons, benz (a) pyrene, Zn, Cu, Pb and Cd, were found in the central part of the bay. At the same time, the intensity of accumulation of pollutants depends on the type of bottom sediments. The results of the study showed that the accumulation of pollutants depends on the mineralogical composition of bottom sediments. At the same time, there is a tendency to accumulation in clayey mud and clay for all types of pollutants. As for the heavy metals, it was managed to determine the order of decrease in their concentrations in bottom sediments, having the following form: for sand and clay sand Zn> Pb> Cu> Cd, for clay silt and clay Zn> Cu> Pb> Cd. In general, the greatest potential for the accumulation of pollutants is found on mud and clay grounds, since silt deposits have a greater sorption surface and the ability to retain sorbed substances. Sandy and sandy-clay bottom substrates are characterized by the lowest accumulating capacity.

Keywords: benzo(a)pyrene, Dvinsky Bay, heavy metals, petroleum hydrocarbons, sediments

Bibliographic link:
Klimovskii N.V., Novoselov A.P., Chernova V.G., Petrakova I.V. Accumulation of pollutants by bottom sediments in the Dvina Gulf of the White Sea // Water: chemistry and ecology. — 2017. — № 10. — c. 3-10. — http://watchemec.ru/en/article/28687/

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