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首页> 外文期刊>Environmental Science & Technology >Stable Carbon Isotopic Apportionment of Individual Polycyclic Aromatic Hydrocarbons in St. John's Harbour, Newfoundland
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Stable Carbon Isotopic Apportionment of Individual Polycyclic Aromatic Hydrocarbons in St. John's Harbour, Newfoundland

机译：纽芬兰圣约翰海港中单个多环芳烃的稳定碳同位素分配

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摘要

Much interest has recently focused on the quantitative apportionment of multiple sources of toxic and carcinogenic compounds in natural aquatic systems. Apportionment studies of polycyclic aromatic hydrocarbons (PAH) are of great interest because, in addition to their suspected toxic and carcinogenic properties, they also have a wide range of potential natural and anthropogenic sources. This paper presents the results of a study where the primary source inputs of PAH to sediments of St. John's Harbour are quantitatively assessed using a combination of molecular abundance and carbon isotope measurements of individual (4- and 5-ring) PAH. Mass balance calculations using a two-component mixing model show that approximately 50-80% of the PAH input to the Harbour sediments is of combustion origin, likely dominated by vehicular emissions carried by surface runoff from the city of St. John's. Direct petroleum-related contribution, possibly dominated by crankcase oil, accounts for the remaining 20-50% of the total PAH input.
机译：最近，人们非常关注天然水生系统中多种来源的有毒和致癌化合物的定量分配。多环芳烃（PAH）的分配研究非常令人感兴趣，因为除了其疑似的毒性和致癌特性外，它们还具有广泛的潜在天然和人为来源。本文介绍了一项研究的结果，其中结合了分子丰度和单个（4环和5环）PAH的碳同位素测量，定量评估了圣约翰港沉积物中PAH的主要来源输入。使用两组分混合模型进行的质量平衡计算表明，输入到港口沉积物中的PAH约有50-80％来自燃烧，很可能是由圣约翰市地表径流携带的车辆排放所控制。与石油有关的直接贡献，可能是曲轴箱油，占PAH投入总量的其余20-50％。

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