Kiseleva I.V., Kholomeidik A.N., Shchapova L.N., Panasenko A.E.
Microbiology 2022; 91(6): 796-800
Solutions of SbF3 and NaSbF4 (50 and 100 mg/L) were found to have a toxic effect on soil microflora. At the final concentration of 50 mg/L, bacteria and microscopic fungi were detected sporadically in the nutrient medium (MPA). At 100 mg/L, bacterial growth in the studied soils was completely suppressed. Microscopic fungi were found to be more resistant to the action of the studied compounds. Addition of 0.1 M sodium dihydrophosphate (NaH2PO4) solution to SbF3 or NaSbF4 solutions resulted in a 5.7‒6.9-fold decrease in the concentration of dissolved Sb3+ ions. However, this solution still had a toxic effect on the number of soil microorganisms. In contrast to reagent purification, the method of sorption extraction of Sb(III) was shown to be efficient. A solution containing 5000 mg/L antimony, which was used to dilute the soil suspension, completely suppressed the growth of microflora. After sorption treatment, the concentration of antimony decreased to 201.3 mg/L, and growth of microorganisms was noted.
