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- Title
Hydrocarbons in the modern sediments of the Caspian Sea.
- Authors
Nemirovskaya, I.
- Abstract
The presented results have been obtained in a study of the concentrations and composition of aliphatic and polycyclic hydrocarbons in bottom sediments of Volga delta branches and in its shallow zone (2009-2010), as well as the Caspian Sea proper (2010-2013). Oil hydrocarbon pollution has been found to manifest itself mostly in Volga delta branches, which, despite the low concentrations (up to 54.5 μg/g), showed higher hydrocarbons share in C (up to 33.8%), while the composition of alkanes suggested their oil genesis. The geochemical barrier the Volga-the Caspian Sea prevents anthropogenic hydrocarbons from entering the open parts of the Caspian. Bottom sediments in the shallow zone of the Northern Caspian, represented by coarse-grained material, are now polluted by oil hydrocarbons to a lesser extent compared with other areas. The highest concentrations of aliphatic hydrocarbons (up to 178 μg/g) were recorded in the deepsea bottom sediments of Derbent Depression and in depressions of the Middle and Southern Caspian. These areas show a higher concentration of C (up to 9.884%) and a low concentration of hydrocarbons in C (up to 0.16%), while odd high-molecular homologues ( n-C-C) dominate in the composition of alkanes.
- Subjects
CASPIAN Sea; HEAVY metal content of sediments; SEDIMENT analysis; HYDROCARBON analysis; MARINE sediment analysis; MARINE ecology
- Publication
Water Resources, 2016, Vol 43, Issue 1, p111
- ISSN
0097-8078
- Publication type
Article
- DOI
10.1134/S009780781506007X