[Effect of nickel ions on physiological and corrosion activity of bacteria of sulfur cycle].

ABSTRACT

The paper deals with the effect of nickel ions concentration in nutrient medium on sulfate-reducing bacteria Desulfovibrio desulfuricans 10-V (SRB) and their artificial corrosion-active associations which included thionic bacteria and their satellite Stenotrophomonas maltophilia. It is shown that the concentration of nickel in the nutrient medium being increased, the duration of lag-phase of SRB growth became 2-2.5 times less, and that of artificial associations--3-3.5 times less. The specific growth rate did not change in all the experiment variants. At the same time the hydrogenase and corrosion activity of the studied cultures increases almost twice with nickel content increase in the cultural medium to 0.5 mg/ml. Further increase of nickel concentration did not cause the change of the above parameters.