Sudyina L.V., Minnikova T.V., Kolesnikov S.I., Tsepina N.I., Ter-Misakyants T.A., Nevedomaya E.N., Kazeev K.Sh.

Assessment of the total number of bacteria in soil contamination with bismuth

UThe results of estimating the total number of bacteria in soil contamination with bismuth are presented. It was found that regardless of the chemical form, bismuth contamination of soils leads to a decrease in the total number of bacteria. Based on the chemical form of the pollutant, the average series of bismuth toxicity for soils for the total number of bacteria is as follows: bismuth nitrate (70)> bismuth carbonate (81) ꞊ bismuth oxide (81). Bismuth nitrate has the highest Ecotoxicity due to its good solubility and greater mobility in the soil solution of Bi3+cations.When comparing soil resistance to bismuth contamination, the following series was obtained: chernozem ordinary (81) > sierosand (77) >brown forest acidic soil (73). The established sequence is determined by the genetic properties of the studied soils, the granulometric composition, the reaction of the soil environment, the content of organic matter, and biological activity

Keywords:BISMUTH, POLLUTION, THE TOTAL NUMBER OF BACTERIA, CHERNOZEM ORDINARY, BROWN FOREST ACIDIC SOIL, SIEROSAND