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首页> 外文期刊>Estuarine Coastal and Shelf Science >Petroleum Pollution In Surface Sediments Of Daya Bay, South China, Revealed By Chemical Fingerprinting Of Aliphatic And Alicyclic Hydrocarbons
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Petroleum Pollution In Surface Sediments Of Daya Bay, South China, Revealed By Chemical Fingerprinting Of Aliphatic And Alicyclic Hydrocarbons

机译：脂族和脂环族烃的化学指纹显示华南大亚湾表层沉积物中的石油污染

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摘要

Nine surface sediments collected from Daya Bay have been Soxhlet-extracted with 2:1 (v/v) dichloro-methane-methanol. The non-aromatic hydrocarbon (NAH) fraction of solvent extractable organic matter (EOM) and some bulk geochemical parameters have been analyzed to determine petroleum pollution of the bay. The NAH content varies from 32 to 276 μg g~(-1) (average 104 μgg~(-1)) dry sediment and accounts for 5.8-64.1% (average 41.6%) of the EOM. n-Alkanes with carbon number ranging from 15 to 35 are identified to be derived from both biogenic and petrogenic sources in varying proportions. The contribution of marine authigenic input to the sedimentary n-alkanes is lower than the allochthonous input based on the average n-C_(31)-C_(19) alkane ratio. 25.6-46.5% of the n-alkanes, with a mean of 35.6%, are contributed by vascular plant wax. Results of unresolved complex mixture, isoprenoid hydrocarbons, hopanes and steranes also suggest possible petroleum contamination. There is strong evidence of a common petroleum contamination source in the bay.
机译：从大亚湾收集的九种表面沉积物已用2：1（v / v）的二氯甲烷-甲醇进行了索氏提取。分析了溶剂可萃取有机物（EOM）的非芳烃（NAH）组分和一些总体地球化学参数，以确定该海湾的石油污染。 NAH含量在32至276μgg〜（-1）（平均104μgg〜（-1））干燥沉积物中，占EOM的5.8-64.1％（平均41.6％）。碳数在15到35之间的正构烷烃被确定以不同比例衍生自生物和成岩来源。基于平均n-C_（31）/ n-C_（19）烷烃比，海洋自生输入对沉积正构烷烃的贡献低于异源输入。维管植物蜡贡献了25.6-46.5％的正构烷烃，平均为35.6％。未分离的复杂混合物，类异戊二烯烃，hop烷和甾烷的结果也表明可能存在石油污染。有充分的证据表明海湾中有一个常见的石油污染源。

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