[An ecologic hygiene assessment of the microbiological processes in soil contaminated with sulfonol and lead]

Alteration of the microbial coenosis and biological activity of different types of soils as well as peculiarities of survival of sanitary-significant and pathogenic microorganisms under the effect of sulphonol and a sulphonol-lead complex have been studied in the laboratory model experiment. The most sensitive tests were as follows: the number of nitrifying bacteria; nitrifying, proteolytic, dehydrogenase and cellulase activity; survival of salmonella and lactose-positive colibacilli. Under the effect of the tested sulphonol (0.5 and 3 mg/l) and lead (0.1 and 2 mg/l) concentrations the self-purification processes in soil were not substantially disturbed, though surfactants negatively affected viability of enterobacteria.