GC and GC-MS characterization of crude oil transformation in sediments and microbial mat samples after the 1991 oil spill in the Saudi Arabian Gulf coast

被引：22

作者：

de Oteyza, TG ^{[1
]}

Grimalt, JO ^{[1
]}

机构：

[1] CSIC, Inst Chem & Environm Res, Dept Environm Chem, ES-08034 Barcelona, Catalonia, Spain

来源：

ENVIRONMENTAL POLLUTION | 2006年 / 139卷 / 03期

关键词：

microbial mats; oil spills; crude oil degradation; coastal environments; cyanobacteria; aliphatic hydrocarbons; isoprenoid hydrocarbons; aromatic hydrocarbons; dibenzothiophenes; benzohopanes;

D O I：

10.1016/j.envpol.2005.05.022

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The massive oil discharge in the Saudi Arabian coast at the end of the 1991 Gulf War is used here as a natural experiment to study the ability of microbial mats to transform oil residues after major spills. The degree of oil transformation has been evaluated from the analysis of the aliphatic and aromatic hydrocarbons by gas chromatography (GC) and GC coupled to mass spectrometry (GC-MS). The oil-polluted microbial mat samples from coastal environments exhibited an intermediate degree of transformation between that observed in superficial and deep sediments. Evaporation, photo-oxidation and water-washing seemed to lead to more effective and rapid elimination of hydrocarbons than cyanobacteria and its associated microorganisms. Furthermore, comparison of some compounds (e.g. regular isoprenoid hydrocarbons or alkylnaphthalenes) in the oil collected in the area after the spill or in the mixtures retained by cyanobacterial growth gave rise to an apparent effect of hydrocarbon preservation in the microbial mat ecosystems. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：523 / 531

页数：9

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