Respiratory activity and phytoproductivity of oil-contaminated gray forest soil depending on remediation approach
https://doi.org/10.46845/1997-3071-2024-73-36-50
Abstract
The influence of granular product obtained by thermomechanical treatment of municipal sewage sludge on respiratory activity and phytoproductivity of oil-contaminated gray forest soil has been studied. At the biological treatment facilities of the city of Kazan sewage sludge are subjected to thermomechanical treatment, which results in the formation of granules 3–9 mm in size with moisture content of 5–10% (hereinafter referred to as granulate), which are sufficiently resistant to moisture and mechanical impact. Granulate is certified and is actually a complex, organomineral fertilizer, with the potential ability to stimulate microbiological processes, intensification of plant growth on degraded and contaminated soils. The application of granulate (organic matter – 60.4 %, N total – 3.0 %, N total – 1.5 %, hazard class IV) stimulates respiratory activity, increases the efficiency of oil products destruction, increases phytoproductivity of plants, which indicates the possibility of its application in biological remediation of oil-contaminated soil. The observed decrease of microbial respiration coefficient in the presence of granulate reflects the increase of soil microorganisms resistance to oil pollution. Comparison of the studied approaches demonstrated higher efficiency of destruction of high concentrations of petroleum products in gray forest soil under biological remediation as compared to technical remediation. Technical reclamation of soil in the range of petroleum products content of 2.7–19.7 g/kg, presupposing moistening and mixing, had little effect on respiratory activity and plant productivity, while in the variant containing 2.7 g/kg the efficiency of pollutant degradation was higher than in the experiments with granulate. When carrying out reclamation measures on soil samples with high content of oil products, application of SS granulate at the rate of 10 t/ha increases the efficiency of their destruction.
About the Authors
A. A. Utombaeva
Institute of Ecology and Subsoil Use Problems, Academy of Sciences of RT
Russian Federation
Russian Federation
Alina A. Utombaeva, postgraduate student, junior researcher
Kazan
A. A. Vershinin
Institute of Ecology and Subsoil Use Problems, Academy of Sciences of RT
Russian Federation
Russian Federation
Anatoliy A. Vershinin, Ph.D. in Biology, senior researcher
Kazan
E. R. Zaynulgabidinov
Institute of Ecology and Subsoil Use Problems, Academy of Sciences of RT
Russian Federation
Russian Federation
Erik R. Zaynulgabidinov, Ph.D. in Biology, senior researcher
Kazan
A. M. Petrov
Institute of Ecology and Subsoil Use Problems, Academy of Sciences of RT
Russian Federation
Russian Federation
Andrey M. Petrov, Ph.D. in Biology, leading researcher, head of the environmental biotechnology laboratory
Kazan
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For citations:
Utombaeva A.A., Vershinin A.A., Zaynulgabidinov E.R., Petrov A.M. Respiratory activity and phytoproductivity of oil-contaminated gray forest soil depending on remediation approach. KSTU News. 2024;(73):36-50. (In Russ.) https://doi.org/10.46845/1997-3071-2024-73-36-50
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