ENVIRONMENTAL AND TOXICOLOGICAL ASSESSMENT OF AGRICULTURAL LANDS IN THE KHERSON REGION WHICH WERE FLOODED AS A RESULT OF THE DESTRUCTION OF KAKHОVKA HPP

Abstract

The article highlights the ecological danger of flooding of agricultural land as a result of the destruction of the Kakhovka HPP dam. The results of experimental studies of the content of mobile compounds of heavy metals in ten soil samples, silt and silt samples taken in the territory of the Kherson and Berуslav districts of the Kherson region are given. Based on the results of the research, it was established that the maximum limit of mobile lead compounds was exceeded in 4 soil samples (from 1.04 to 2.9 times), silt samples (by 1.04 times) and silt (by 4.2 times), cadmium – by per soil sample (1.07 times) and sludge (1.01 times), nickel and zinc – in a sludge sample (1.03 and 1.01 times, respectively). According to the content of copper, manganese and cobalt and exceeding the maximum allowable concentrations in the samples of soil, silt and silt were not detected. The highest degree of contamination with mobile compounds of lead and cadmium was found in soil samples 2 and 11 taken on the territory of the village. Tyaginka of Beryslav district and village Chornobaivka, Kherson district. A sample of soil and silt, which was taken from the same site, had an identical content of lead and approximately the same content of mobile compounds of cadmium, copper and manganese. Compared to the soil, the silt sample was characterized by a higher content of mobile compounds of zinc, iron, and nickel. In a sample of sludge (taken from the territory of the village of Tiahynka, Tiahynka TС, Beryslav district, Kherson region), an excess of the maximum permissible concentration in terms of lead content (by 4.2 times) and slight excesses in the content of mobile compounds of cadmium, zinc and nickel Silt and silt contain a higher content of pollutants than soil samples. We can assume that they, moving with the flow of water as a result of the destruction of the Kakhovka HPP, can lead to soil pollution in flooded areas. According to the results of the correlation analysis, an extremely strong dependence was established between the content of all mobile compounds of the investigated heavy metals, with the exception of manganese compounds.