DOI:

10.24411/1728-323X-2018-14070

Section

Geoecology

Title

ESTIMATION OF HEAVY METAL FLUXES (PB, CD) IN THE ABIOTIC COMPONENTS OF THE AZOV SEA ECOSYSTEM

Сontributors

M. V. Bufetova, Associate Professor of the Department of Ecology and Nature Management of Sergo Ordzhonikidze Russian State Geological Prospecting University (MGRI-RGGRU), This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract

The article presents the data for 2017 on the pollution of water and bottom sediments of the Azov Sea with lead and cadmium. It is shown that the values of lead in water exceeded MPC in the Kerch Strait, near the port of Yeysk, as well as in the area of the town of Temryuk. The maximum allowable concentration levels in the water were observed for cadmium. The excess of permissible cadmium concentration in the bottom sediments was re-corded at the mouth of the river Mertvy Donets River (0.9 ^g/g dry weight). Sufficiently high concentrations of this metal are recorded in the Kerch Strait. The concentration of lead in the bottom sediments was within the range of 2.5—16.2 ^g/g dry weight. The flows of heavy metals with atmospheric deposition, the river runoff of the Don and Kuban are estimated. The amount of lead and cadmium that can be deposited from water to the bottom sediments is calculated. The calculated values of heavy metal fluxes from the Azov Sea on average exceeded the values of flows from the Black Sea through the Kerch Strait. This indicates that the Azov Sea is a source of pollution of the Black Sea ecosystem with lead and cadmium.

Keywords

the Azov Sea, lead, cadmium, flows, pollution, heavy metals.

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