Cleaning of oil-polluted bottom sediments of the boreal lake, Samotlor oil field, North Russia: case report

Small lakes in areas of intensive crude oil production may be susceptible to oil pollution arising from accidental spills and leaks, eventually leading to the pollution of bottom sediments. Effective cleaning of aquatic bottom sediments remains a challenge. Flotation is a potentially simple and reli...

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Bibliographic Details
Published in:	Water science and technology Vol. 82; no. 12; pp. 3062 - 3073
Main Authors:	Frank, Yulia A, Vorobiev, Danil S, Merzlyakov, Oleg E, Sataev, Farid R, Trifonov, Andrey A, Kopylov, Evgeny O, Stryuk, Konstantin V, Kalinovskaya, Ekaterina A, Gronskiy, Sergey V, Chibrikov, Oleg V, Perminova, Vladislava V, Branevskiy, Yaroslav V, Kulizhskiy, Sergey P, Hunter, Tina Soliman
Format:	Journal Article
Language:	English
Published:	England IWA Publishing 15-12-2020
Subjects:	Accidental spills Bottom sediments Case reports Chemical spills Cleaning Contamination Crude oil Dredging Environmental cleanup Environmental Monitoring Excavation Field tests Flotation Fourier transforms Freshwater resources Geologic Sediments Hydrocarbons Laboratories Lake sediments Lakes Oil and Gas Fields Oil fields Oil pollution Oil production Oil spills Peat Petroleum Petroleum production Pipelines Pollutants Pollution control Russia Sediment Sediments Technology Water bodies Water Pollutants, Chemical - analysis Water pollution Russia Switzerland
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Summary:	Small lakes in areas of intensive crude oil production may be susceptible to oil pollution arising from accidental spills and leaks, eventually leading to the pollution of bottom sediments. Effective cleaning of aquatic bottom sediments remains a challenge. Flotation is a potentially simple and reliable approach for the cleanup of bottom sediments without their excavation from the water body. Full-scale testing of flotation-based technology using the specially designed airlift plant allowed the cleaning of bottom sediments of an unnamed boreal lake ('the lake') within the Samotlor oil field, North Russia, heavily polluted with crude oil several decades ago. The lake bottom sediments are dominated by peat and unevenly polluted with oil. The average oil content in the lake bottom sediments was 111 g kg . During the 1.5 months' field test in July-August 2018, the average total oil concentration in the bottom sediments of the lake was reduced to 1.99 g kg . Secondary water contamination was minimal; the content of oil hydrocarbons in the water after completion of work did not exceed 0.09 ± 0.04 mg L . This study demonstrates that flotation-based technology can be applied for in situ cleaning of oil-contaminated lake bottom sediments including those in boreal climates.
ISSN:	0273-1223 1996-9732
DOI:	10.2166/wst.2020.555