Molecular and stable isotopic compositions of crude oils and their variations during weathering experiments

Title
Molecular and stable isotopic compositions of crude oils and their variations during weathering experiments
Author(s)
김은식; 김문구; 김기범; 심원준; 하성용; 주창규
KIOST Author(s)
Kim, Moon Koo(김문구)Shim, Won Joon(심원준)Ha, Sung Yong(하성용)
Publication Year
2011-06-02
Abstract
Crude oil is a complex mixture of thousands of different organic compounds formed from a variety of organic materials that are chemically converted under differing geological conditions over long periods of time. Oils from different sources have distinct chemical compositions, which can be used to identify the source of oil pollution. The chemical compositions of spilled oils, however, can be altered in the environment by a number of physicochemical and biological factors including evaporation, dissolution, photooxidation and microbial degradation, making source identification difficult. In this study, compound compositions and stable isotope ratios of six crude oils were analyzed using GC/MS, GC/FID and GC/IRMS. Parent PAHs, akylated PAHs and n-alkane profiles of individual crude oil showed significant differences among crude oils. Diagnostic ratios of source-specific PAH compounds were also varied clearly. The stable isotopic compositions of n-alkane in crude oils exhibited significant differences (27.5‰ - 37.2‰) among crude oils. However, compound compositions of crude oils were altered during the weathering experiment. Low molecular weight PAHs compounds decreased rapidly and short-chain n-alkanes also decreased. However, the stable isotopic compositions of n-alkanes in weathered oil did not show significant changes. This study shows that stable isotope profile of n-alkanes c
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/28344
Bibliographic Citation
2011년도 한국해양과학기술협의회 공동학술대회, pp.390, 2011
Publisher
한국해양과학기술협의회
Type
Conference
Language
Korean
Publisher
한국해양과학기술협의회
Related Researcher
Research Interests

Microplastic pollution,Persistent Organic Pollutants,Oil Pollution,미세플라스틱 오염,잔류성 유기오염물질,유류오염

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