Studies on the profile of polychlorinated biphenyls congeners in bottom sediments of the Barents Sea
https://doi.org/10.36038/2307-3497-2022-188-125-135
Abstract
This paper aims to study variations in the content and profiles of PCB congeners in the bottom sediments in some areas of the Barents Sea, the reasons for their formations, and to identify the main sources of pollution.
The material and methods: The data collected by the scientists of PINRO during the surveys in the Barents Sea from 2004 to 2019 was used to conduct the studies. Totally, samples from 630 stations were examined. The PCB content was detected by capillary gas chromatography using a Shimadzu GCMS-QP2010 Plus chromatograph mass spectrometer (Japan). The data were processed with GIS-technologies using Arcview 3.2 (ESRI) and MS Excel descriptive statistics.
Results: A chart showing the contamination of bottom sediments with PCB in the Barents Sea was compiled and presented. We studied the profile of PCB11 and PCB12 congeners in sediments that were taken from different marine areas, particularly the Kola Bay, the Spitsbergen shelf, the Eastern (Central) Basin and the northeastern Barents Sea. In a number of stations that were chosen for the survey (i. e. the section), we made observations on variations in the profile of PCB congeners in bottom sediments as the distance to the sources of pollution increased. We identified considerable variations in the PCB congeners’ profile in the Kola Bay area from the shelf area to the southeast of Spitsbergen and other investigated areas. The paper shows a salient variation in the composition of PCB congeners with increasing distance from Spitsbergen. The pollution caused by melting of snow, firn and glaciers in the Arctic archipelagos, as well as local pollution in the bays should be considered as the main sources of pollution of bottom sediments with PCBs in the Spitsbergen shelf.
Practical relevance: The obtained results will contribute to a better understanding of the processes related to the global pollution of the Barents Sea ecosystem and an assessment of the potential hazard of PCB pollution for demersal commercial marine species.
About the Authors
М. А. Novikov
Polar branch of «VNIRO» (N. M. Knipovich «PINRO»)
Russian Federation
Russian Federation
Мikhail А. Novikov
183038
6, Academician Knipovich St.
Murmansk
E. А. Gorbacheva
Polar branch of «VNIRO» (N. M. Knipovich «PINRO»)
Russian Federation
Russian Federation
Elena А. Gorbacheva
183038
6, Academician Knipovich St.
Murmansk
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Review
For citations:
Novikov М.А., Gorbacheva E.А. Studies on the profile of polychlorinated biphenyls congeners in bottom sediments of the Barents Sea. Trudy VNIRO. 2022;188:125-135. (In Russ.) https://doi.org/10.36038/2307-3497-2022-188-125-135
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