STUDY OF THE BOTTOM SEDIMENTS OF RESERVOIRS OF URAL-CASPIAN BASIN
Tulemisova G. Abdinov R. Amangosova A. Batyrbaeva G.
2022National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2022#2022Issue 1126 - 134 pp.
Pollution entering the pond, especially heavy metals, is passed through the food chain to the person. In this chain, an important role is played by bottom sediments. Bottom sediments are of particular ecological interest among all parameters of the marine environment due to their important role in the processes of biological transformation. Today, it is very important to analyze the level of accumulation of heavy metals in bottom sediments. With an excess of their concentration, the problem is aggravated by the ability of heavy metals to accumulate and retain for a long time at all levels of the ecological pyramid, which can lead to long-term effects, since many metals are carcinogenic and mutagenic substances. The article presents the results of studies of the sediments on the content of heavy metals in reservoirs of the Ural-Caspian basin. Samples of the bottom sediments of the Ural (Zhayik), Kigach and the squares of the North-eastern Caspian were studied at different periods of the year. In the Ural River, the maximum permissible concentration is exceeded by the content of copper, chromium and lead. In the Kigach River, high levels of copper, chromium and nickel are present. In the bottom sediments of the North-еastern Caspian, the chromium content exceeds the maximum permissible concentration by several dozen times. In conclusion, I would like to note that studies carried out in various water bodies of the Ural-Caspian basin have shown the presence of toxic pollution in bottom sediments. Their concentration depends on the amount of runoff entering the reservoir. Although, at different points of the study, they show different values, the point is that they exist and play an important role in limiting the number of biological resources.
Heavy metals , Maximum permissible concentration , The atomic absorption spectroscopy , The bottom sediments , The Ural-Caspian Basin
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Kh. Dosmukhamedov Atyrau University, Atyrau, Kazakhstan
Kh. Dosmukhamedov Atyrau University
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