Resumo

. LUSHNIKOV, Sergey V; FRANK, Yulia A  e  VOROBYOV, Danil S. OIL DECONTAMINATION OF BOTTOM SEDIMENTS EXPERIMENTAL WORK RESULTS. Earth Sci. Res. J. [online]. 2006, vol.10, n.1, pp.35-40. ISSN 1794-6190.

This article presents the results of experimental work during 2004-2005 on oil decontamination of bottom sediments of Lake Schuchye, situated in the Komi Republic (Northern Russia). The cause of the contamination were huge oil spills occurred after a series of accidental ruptures on the Harjaga-Usinsk and Vozej-Usinsk oil-pipe lines in 1994. Flotation technology was used for the cleaning of bottom sediments. 157 tons of crude oil were removed during the course of 2-year experimental work from an area of 4,1 ha. The content of aliphatic and alicyclic oil hydrocarbons was reduced from 53,3 g/kg to 2,2 g/kg, on average. Hydrobiological investigations revealed that bottom sediments started to be inhabited by benthos organisms, dominantly Oligochaeta. Besides Oligochaeta, Chironomidae maggots and Bivalvia were detected. The appearance of Macrozoobenthos organisms can serve as a bioindicator of water quality.

Palavras-chave : Bioindication; bottom sediments; macrozoobenthos; oil contamination and decontamination of water ecosystems.

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