Changing the Properties of Oil-Contaminated Soils

Merzlyakova, Anna; Околелова, А. А.; Заикина, В Н; Pasikova, A.V.

doi:10.21285/2227-2925-2017-7-2-164-171

Cited by 3 publications

(1 citation statement)

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“…и от 1,5 до 3 раз за весь период наблюдений. Повышение концентрации данного элемента в загрязнённой НП почве также отмечалось в условиях полевого исследования [19]. Причиной этому могут служить процессы естественного разложения нефти, на что указывают некоторые авторы [20].…”

Section: результаты и обсуждениеunclassified

The study of the integral toxicity of oil-contaminated soil

Kurbatov,

Trifonova

2023

TaAE

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The effect of contamination with technical waste oil on the integral toxicity of sod-podzolic sandy loam soil under field experiment conditions was studied. The integral toxicity of the soil aqueous extract was determined using the «Ecolum» bacterial test, which is a luminescent gene-engineered Escherichia coli. Control soil samples show acceptable levels of toxicity. Soils contaminated with 10 or 20 g/kg doses of petroleum products are moderately toxic. The dose of 30 g/kg makes the soil highly toxic for luminescent microorganisms. The hydrocarbon composition of technical waste oil was determined using spectral coefficients obtained by infrared spectrometry. High content – 6.73% – of aromatic hydrocarbons (the most toxic fraction) was revealed. Correlation analysis between the soil toxicity index, the content of oil products, heavy metals (Co, Ni, Cu, Zn, Pb) and the pH of the soil aqueous extract showed a very strong positive correlation between toxicity and zinc content (r = 0.88) and oil products content (r = 0.83) in the soil, as well as a high negative correlation on soil pH (r = –0.61). The phytomass of plants growing on contaminated sites was determined. A very high inverse correlation (r = –0.82) between the content of oil hydrocarbons in the soil and phytomass confirms that soil contamination with an increased dose of oil products reduces the biomass of the aboveground part of plants. A general tendency to displacement of monocots and their replacement by dicots was observed for polluted soils.

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Section: результаты и обсуждениеunclassified

The study of the integral toxicity of oil-contaminated soil

Kurbatov,

Trifonova

2023

TaAE

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

Bykova

Alekseenko

Пашкевич

et al. 2021

Environ Geochem Health

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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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Methodology for thermal desorption treatment of local soil pollution by oil products at the facilities of the mineral resource industry

Пашкевич

Bykova

2022

PMI

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The analysis of the main environmental consequences of leaks and local spills of petroleum products at the enterprises of the mineral resource complex is presented. It is established that the problem of soil contamination with petroleum products at the facilities of the mineral resource complex and enterprises of other industries is caused by significant volumes of consumption of the main types of oil products. Based on the results of the author's previous field research, a series of experiments was carried out, consisting in modeling artificial soil pollution with petroleum products such as gasoline, diesel fuel, highly refined oil, motor oil, and transmission oil, followed by their purification by heat treatment at temperatures of 150, 200, and 250 °C. The 250 °C limit of the heating temperature was set due to the need to partially preserve the structure and quality of the soil after heat treatment to preserve its fertility. When the processing temperature rises to 450 °C, all humates are completely burned out and, as a result, productivity is lost. Confirmation is provided by the results of experiments to determine the humus content in uncontaminated soil and soil treated at different temperatures. It was found that at a maximum processing temperature of 250 °C, about 50 % of the initial organic carbon content is preserved. According to the results of the conducted experimental studies, the dependences of the required processing temperature on the concentration of petroleum products to reduce the concentration of petroleum products to an acceptable level have been established. The methodology of thermal desorption cleaning of soils with varying degrees of contamination at enterprises of the mineral resource complex is presented.

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Changing the Properties of Oil-Contaminated Soils

Cited by 3 publications

References 0 publications

The study of the integral toxicity of oil-contaminated soil

The study of the integral toxicity of oil-contaminated soil

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

Methodology for thermal desorption treatment of local soil pollution by oil products at the facilities of the mineral resource industry

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