| Autor: |
Bykova MV; Department of Geoecology, Saint Petersburg Mining University, 2, 21st line V.O., Saint Petersburg, Russian Federation, 199106., Alekseenko AV; Department of Geoecology, Saint Petersburg Mining University, 2, 21st line V.O., Saint Petersburg, Russian Federation, 199106. al.vl.alekseenko@gmail.com., Pashkevich MA; Department of Geoecology, Saint Petersburg Mining University, 2, 21st line V.O., Saint Petersburg, Russian Federation, 199106., Drebenstedt C; Technische Universität Bergakademie Freiberg, 1a, Gustav-Zeuner-Str., Freiberg, 09596, Germany. |
| Abstrakt: |
The results of field, analytical, and experimental research at a number of production facilities reflect the properties of oil-contaminated soils in 3 landscapes: the permafrost treeless Arctic ecosystem, boreal forest, and temperate-climate grassland-woodland ecotone. Laboratory studies have revealed the concentrations of petroleum hydrocarbons in soils, ranging from medium levels of 2000-3000 mg/kg to critical figures over 5000 mg/kg, being 2-25 times higher than the permissible content of oil products in soils. The experimentally applied thermal effects for the oil products desorption from the soil allowed finding an optimal regime: the treatment temperature from 25 to 250 °C reduces the concentrations to an acceptable value. The conditions are environmentally sound, given that the complete combustion point of humates is ca. 450 °C. The outcomes suggest the eco-friendly solution for soil remediation, preserving the soil fertility in fragile cold environments and in more resilient temperate climates, where revitalized brownfields are essential for food production. |
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