Biological Activity of Leached Chernozem under Oil and Sodium Chloride Pollution and the Effect of Treatment with Halotolerant Oil-Destructing Bacteria

Soil contamination with oil is often accompanied by pollution with oil-field wastewater containing a significant amount of NaCl, which enhances the negative impact of hydrocarbons on soil, plants, and soil microbiota. Therefore, for biotechnological purification of soils subjected to such combined p...

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Bibliographic Details
Published in:Eurasian soil science 2023, Vol.56 (1), p.75-86
Main Authors: Kuzina, E. V., Rafikova, G. F., Mukhamatdyarova, S. R., Sharipova, Yu. Yu, Korshunova, T. Yu
Format: Article
Language:English
Subjects:
Actinomycetes
Analysis
Bacteria
Biological activity
Bioremediation
Catalase
Conservation of Soils
Contamination
Degradation
Earth and Environmental Science
Earth Sciences
Geotechnical Engineering & Applied Earth Sciences
Hydrocarbons
Invertase
Leaching
Microbiota (Symbiotic organisms)
Microorganisms
Oil
Oil and gas fields
Oil fields
Oil pollution
Oxidation
Phytotoxicity
Pollutants
Pollution
Pollution effects
Rehabilitation
Salinity
Salinity tolerance
Sediment pollution
Sodium
Sodium chloride
Soil
Soil bacteria
Soil contamination
Soil microorganisms
Soil pollution
Toxicity
Urease
Wastewater
Wastewater pollution
Water purification
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Summary:Soil contamination with oil is often accompanied by pollution with oil-field wastewater containing a significant amount of NaCl, which enhances the negative impact of hydrocarbons on soil, plants, and soil microbiota. Therefore, for biotechnological purification of soils subjected to such combined pollution, hydrocarbon-oxidizing bacteria resistant to salinity should be used. In a model experiment, the effect of artificial pollution with oil (5%) and sodium chloride (1 and 3%) and their combinations, as well as that of bioremediation using halotolerant hydrocarbon-oxidizing bacteria on the biological activity of leached chernozem (Luvic Chernozem) were studied. The soil contamination with all types of pollutants increased its phytotoxicity, whereas bacterization had a positive effect on this indicator neither in the presence of NaCl nor in case of combined pollution. However, it mitigated toxicity of oil-containing soil to plants. Actinomycetes were the most sensitive to the presence of oil and/or NaCl; their number in contaminated soils decreased by one–two orders of magnitude. The application of microorganisms intensified the decomposition of hydrocarbons, in particular, by 10.5–31.8% in the soil with combined oil and salt pollution. The presence of pollutants suppressed the activity of soil enzymes. Bacterization favored an increase in the catalase activity of the oil-containing soil, restored the urease activity, and intensified the invertase activity upon the combined effect of pollutants.
ISSN:1064-2293
1556-195X
DOI:10.1134/S1064229322601664