Effects of weathering process on the stable carbon isotope compositions of polycyclic aromatic hydrocarbons of fuel oils and crude oils. (August 2018)

• Record Type: Journal Article
• Authors: Li, Ying; Liu, Yu; Jiang, Dawei; Xu, Jixiang; Zhao, Xinda; Hou, Yongchao
• Is Part Of: Marine pollution bulletin. Volume 133(2018)
• Page Start: 852
• Page End: 860
• Publication Date: 2018-08
• Subjects: Oil spills -- Weathering -- Polycyclic aromatic hydrocarbons -- Stable carbon isotope compositions; Marine pollution -- Periodicals; Marine Biology -- Periodicals; Water Pollution -- Periodicals; Mer -- Pollution -- Périodiques; Publications périodiques; Pollution des mers; Lutte antipollution; Electronic journals; 363.7394
• DOI: 10.1016/j.marpolbul.2018.06.038
• Languages: English
• ISSNs: 0025-326X

Abstract

Abstract: Two fuel oils and two crude oils were subjected to a 60-day weathering simulation experiment, and the effects of weathering on some common parameters for aromatics and aromatic δ 13 C values were studied. The results show that weathering of all oil samples affected little the DBT/P (dibenzothiophene/phenanthrene) ratio and methylphenanthrene distribution fraction. Four oil samples could be distinguished only by the DBT/P ratio. The effect of weathering on isotopes in polycyclic aromatic hydrocarbons was small. The results show that the types of four oil samples can be distinguished, while Kuwait and Russia crude oils cannot be discriminated from each other totally by double-coordinate two-dimensional maps for aromatic δ 13 C; all of the oil samples can be distinguished by principal component analysis of δ 13 C for aromatics, the relationship of DBT/P and PAHs δ 13 C values. Therefore, the δ 13 C value of aromatics can be used as an alternative index for the analysis of oil spills. Highlights: DBT/P (dibenzothiophene/phenanthrene) ratio is stable during weathering, and it is distinctive among different oils. The PAHs (polycyclic aromatic hydrocarbons) carbon isotope compositions in oil spills are resistant to weathering process. The oil spills identification can be improved by PAHs chemical fingerprint combined with carbon isotope fingerprint.