Features of bitumoids composition of bottom sediments of the coastal zone of the East Siberian Sea

5th All-Russian Conference with International Participation POLAR MECHANICS

地球科学;力学

Glyaznetsova, Yu.S.^1 ; Zueva, I.N.^1 ; Chalaya, O.N.^1 ; Lifshits, S.Kh.^1

Institute of Oil and Gas Problems, Yakutsk, Russia^1

关键词: Aliphatic compound;    Anthropogenic influence;    Bottom sediments;    East-siberian seas;    Oil contamination;    Oil hydrocarbons;    Oxygen groups;    Saturated hydrocarbons;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/193/1/012009/pdf
DOI  :  10.1088/1755-1315/193/1/012009

学科分类：力学，机械学

来源: IOP

【 摘 要 】

An anthropogenic influence, in particular, oil contamination on the Arctic ecosystems is studied. For this composition of the chloroform bitumoids extracted from the samples of bottom sediments is explored. The samples were taken near seaport Kolyma River and a coastal zone of the East Siberian Sea. In bottom sediments of the seaport the yeild of bitumoid reached 25500 mkg g-1. As appeared, their samples were oil contaminated. Hydrocarbons prevailed significantly over the sum of resinous components in their composition as aliphatic compounds dominated over oxygen groups in chemical structure. N-alkanes maked up 28% of the sum of the identified hydrocarbons with a distribution maximum in the area nC15,16. CPI is typical for oil and oil products. The values of ratio of isoprenoids to n-alkanes and the distribution of isoprenoids point to processes of biodegradation of oil hydrocarbons. In the sea samples the yield of bitumoid much less 193-1577 mkg g-1 and oil contamination traces aren't found. The future of chemical structure and distribution of individual saturated hydrocarbons reveal a strong relationship with terrigenous organic matter of recent deposits. The prevalence of odd hydrocarbons nC23-nC35 and high concentrations nC27, nC29, nC31 is characteristic for lipids of highest land plants.