Bulakhtina G.K.,  Bakaneva A.A., Kudryashov A.V. , Kudryashova N.I. Zn, Cu, Pb, Cd, AND Ni LEVELS IN TISSUES AND ORGANS OF THE MAIN REPRESENTATIVES OF THE LOWER VOLGA ICHTHIOFAUNA // Arid ecosystems. 2020. V. 26. № 4 (85). P. 157-162. | PDF

This article shows the results of studies of the content of heavy metals (zinc, copper, lead, cadmium and nickel) in the muscles and liver of the main commercial fish that belong to different levels of the trophic chain, such as pike, perch, roach and bream caught in the Astrakhan region Chernoyarsky district and in the water of the Volga river. The distribution of metals in the body of hydrobionts is uneven and depends on the properties of the metal itself and the functional characteristics of the organs. It was found that the content of these metals in the water of the Volga River and in the muscles of the hydrobionts does not exceed the maximum permissible concentration (MPC). The purpose of our work was to determine the content of heavy metals in the tissues (muscles) and organs (liver) of the most important commercial fish in the Volga River basin within the Astrakhan region (Chernoyarsky district) and assess the safety of their use as food raw materials. Water samples were taken for GOST 31861-2012. The content of heavy metals in water was determined by the method of inversion voltammetry on the TA-2M analyzer, in muscle tissue and liver was determined by atomic absorption spectrometry on the Kvant-2A device. At the highest concentration, heavy metals (mg/kg) are found in the internal organs (the liver) – 0.14-39.6 mg/kg, and the smallest amount falls on the unit of muscle mass – 0.038-8.13 mg/kg .

Keywords: heavy metals, Volga river, water, hydrobionts, maximum permissible concentration (MPC), links, toxicant.

DOI: 10.24411/1993-3916-2020-10131