Thermal desorption treatment of petroleum hydrocarbon-contaminated soils of tundra, taiga, and forest steppe landscapes.

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.
Jazyk: angličtina
Zdroj: Environmental geochemistry and health [Environ Geochem Health] 2021 Jun; Vol. 43 (6), pp. 2331-2346. Date of Electronic Publication: 2021 Jan 16.
DOI: 10.1007/s10653-020-00802-0
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.
Databáze: MEDLINE