Issue |
BIO Web Conf.
Volume 67, 2023
International Scientific and Practical Conference “VAVILOV READINGS-2023” (VVRD 2023)
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Article Number | 01009 | |
Number of page(s) | 7 | |
Section | Basic Research in the Field of Plant and Microbial Studies | |
DOI | https://doi.org/10.1051/bioconf/20236701009 | |
Published online | 18 September 2023 |
Features of the self-restoration of the oil-contaminated peat-bog soil – a field study
Saint-Petersburg Scientific Research Centre for Ecological Safety – a separate structural subdivision of the Federal State Budgetary Institution of Science “Saint Petersburg Federal Research Center of the Russian Academy of Sciences”, 197110 Saint Petersburg, Russia
* Corresponding author: chugunova54@gmail.com
The features of self-restoration processes of the oligotrophic peat-bog soil disturbed by crude oil pollution were studied. Soil contamination was carried out in field long-term experience. The key soil self-recovery indicators were: (1) the rate of carbon dioxide emission by the soil, which quantitatively characterizes the mineralization of petroleum hydrocarbons by microorganisms; (2) content of petroleum products. The microorganisms of the studied soil were characterized by low resistance to the toxic effects of oil: during the first three years of the experiment, the respiration of oil-contaminated soils was significantly lower than in pure soil. Restoration of microbial respiration to the control level and its further intensive growth occurred after 4-5 years of the experiment only in soils with low oil doses: 0.3 and 0.6 l m-2. In time, this coincided with the maximum rate of oil decomposition, which indicates the microbial nature of its utilization. The respiration of soil with oil high doses (1.8 and 3.0 l m-2) remained significantly lower than in pure soil throughout the entire experiment. At the same time, the amount of oil products in these samples markedly decreased. Oil degradation in these variants could occur due to the activity of anaerobic bacteria or abiotic processes.
© The Authors, published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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