THE CONTENT AND DISTRIBUTION OF HEAVY METALS IN THE BOTTOM SEDIMENTS OF THE IVANKOVO RESERVOIR PLES

Abstract

Currently, the state of water bodies under the influence of technogenic factors is changing, as a rule, for the worse. Studies of the sediments of reservoirs make it possible to identify unfavorable areas and determine the sources of pollution. From the point of view of technogenic pressure, the most dangerous pollutants are trace elements Hg, Cd, Zn, Pb, Cu, Cr, Co, Ni, Fe, Mn, As. The paper presents an assessment of sediments in various areas of the Ivan’kovo reservoir. The content of mobile forms of existence of the following microelements was determined: Cd, Cu, Pb, Zn, Cr, Ni and As. The results of studies of the contamination of bottom sediments by the total concentrations of mobile forms of microelements, estimated by geo-classes - by the contamination of the sorbing fraction (less than 0.02 mm) are presented. The main contaminants are cadmium and lead, which are estimated to be slightly to moderately polluted. A picture is presented of both contamination of the bottom sediments of the Ivan’kovo reservoir with microelements, and the distribution and correlation of their mobile forms of existence in the desired sediments. From the data obtained, it can be concluded that, despite a significant number of pollution sources, at present there is no need to talk about a dangerous load on the studied objects.