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Water Resources - Aliphatic and polycyclic aromatic hydrocarbons have been studied in suspended matter and bottom sediments at the geochemical barrier the Northern Dvina–Dvina Bay during... 相似文献
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I. A. Nemirovskaya 《Doklady Earth Sciences》2014,455(1):306-311
This paper presents data on the content of hydrocarbons (HCs) in the snow-ice cover of the coastal regions of the Dvina and Kandalaksha gulfs, White Sea, in 2008–2012 in comparison with the content of organic carbon, lipids, and the suspension. The accumulation of HCs in the snow-ice cover depends on the degree of pollution of the atmosphere, formation conditions of ice, and intensity of biogeochemical processes at the ice-water boundary. Thus, the highest concentrations in the water basin of Arkhangelsk are identified in snow and in the upper part of the ice. The peculiarities of formation of the snow-ice cover in Rugozero Bay of the Kandalaksha Gulf leads to the concentration of HCs in different snow and ice layers. The decreased HC content in the snow-ice cover of the White Sea, in comparison with previous studies, is caused by recession of industrial production in recent years. 相似文献
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Doklady Earth Sciences - 相似文献
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Water Resources - The article gives the results of studies of the concentration and composition of aliphatic hydrocarbons in suspension in surface water and in the surface layer of bottom sediments... 相似文献
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I. A. Nemirovskaya 《Water Resources》2011,38(3):315-323
The results of studying tar balls on Baltic Sea beaches (the summer of 2008) are given with their comparison with other coastal
areas. Tar balls in concentrations of 0.01–1.2 g/running m on the beaches of Sambiiskii Peninsula are found to correspond
to a mean level of beach pollution. It is shown that, in addition to weathering, even high-molecular homologues in the composition
of tar balls are rapidly decaying. Therefore, the molecular markers currently in use are not unequivocal indicators to the
origin of hydrocarbons. 相似文献
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I. A. Nemirovskaya 《Geochemistry International》2009,47(4):393-404
This paper reports data on the concentrations of organic compounds (organic carbon, Corg; lipids; aliphatic hydrocarbons, AHCs; and polycyclic 0aromatic hydrocarbons, PAHs) in snow, ice, and subice waters from the mouth of the Severnaya Dvina River (2005–2007) and Kandalaksha Gulf (Chupa Bay, 2004) at the end of winter. It was established that organic compounds are accumulated in the snow and upper ice layer near the town of Archangelsk. The distribution of molecular markers indicates that pollution was mainly caused by local fallouts. In Chupa Bay, organic compounds are concentrated in the lower ice layers, which is typical of the Arctic snow-ice cover. The high contents of organic compounds in the snow-ice cover of the White Sea are caused by the pollution of its air and water during the winter season. 相似文献
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Data on the concentration and composition of aliphatic and polyaromatic hydrocarbons in the surface layer and the body of bottom sediments in Volga delta and on the northern Caspian shelf are given. Volga delta sediments are shown to contain large concentrations of organic compounds. It is established that the concentrations of organic compounds is largely dependent on the dispersiveness of sediments. Anthropogenic hydrocarbons, both oil and pyrogenic, fail to pass the marginal filter of the Volga River and do not reach the open part of the sea. Therefore, the hydrocarbons contained in the bottom sediments on the Caspian Sea shelf are mostly of natural genesis. The distribution of organic compounds in the bottom sediment strata has a complex character. In some cases, their concentration increases because of the higher flux of hydrocarbons (especially, polyarenes in the 1950s). 相似文献