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Study of Hydrocarbons in Snow-Ice Cover and in Bottom Sediments at Northern Dvina Mouth;pp. 151-169 $100.00
Authors:  (I. Nemirovskaya, V. Shevchenko, P.P. Shirshov, Institute of Oceanology RAS, Moscow, Russia)
Abstract:
Data on the content of aliphatic hydrocarbons (HC), polycyclic aromatic hydrocarbons (PAH) and suspended matter in snow, ice and under-ice water and bottom sediments at Northern Dvina mouth are presented. It has been revealed that the content of particulate matter and organic compounds in snow sharply increases along with approaching industrial centers. Decrease of concentrations of studied compounds with moving off sources could testify that pollutants deposit mostly locally. Concentration of organic compounds found in barrier zones “snow-ice” and “water-ice” depend on the source of pollution.
Contents have been revealed of aliphatic HC of 13–1532 μg g-1 (up to 74% from organic carbon) and PAH of 3–217 ng g-1 (up to 19.57% х10-2 from organic carbon) in bottom sediments in the Spring Flood and correspond to their contents in regions with permanent input of pollutants and is noticeably higher than contents of HC in the studied area in summer. Weathered oil and pyrogenic compounds dominated in the composition of HC. It has been shown that during the flood Northern Dvina – Dvina Bay geochemical barrier becomes a filter, which prevents pollutant penetration to the White Sea. 


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Study of Hydrocarbons in Snow-Ice Cover and in Bottom Sediments at Northern Dvina Mouth;pp. 151-169