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Occurrence distribution and composition of aliphatic and polycyclic aromatic hydrocarbons in sediment cores from the Lower Fox River Wisconsin US

机译：美国威斯康星州下福克斯河沉积岩心中脂肪烃和多环芳烃的存在分布和组成

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The Lower Fox River is a 39 mile section which supports approximately 270,000 rural inhabitants across 18 counties, 303,000 metropolitan residents in Green Bay and Appleton, Wisconsin, and several large industrial complexes such as paper mills and power plants. This paper presents the distribution and concentrations of aliphatic (n-alkanes) and aromatic hydrocarbons (polycyclic aromatic hydrocarbons [PAHs]) as well as total organic carbon (TOC) in the Lower Fox River to identify the sources of hydrocarbon contamination. Excluding one outlier, percent TOC values were between 0.73 and 19.9% with an average value of 6.74%. Total n-alkanes ranged from 3.51 μg/g to 117 μg/g and showed a strong presence of odd carbon-numbered n-alkane ratios (range of C25 to C35), suggesting source input from terrestrial biomass. The mean polycyclic aromatic hydrocarbon (PAH) concentration was 24,800 ng/g. High molecular weight PAH concentrations dominated the distribution of hydrocarbon contaminants. Cross-plots of PAHs were used to compare diagnostic source ratios of benz[a]anthracene (BaA), chrysene (Chr), fluoranthene (Flu), pyrene (Pyr), anthracene (Ant), phenanthrene (Phe), indeno[1,2,3-cd]pyrene (InP), and benzo[g,h,i]perylene (BghiP) by depth and area. PAH ratios varied slightly with the core depth. Deeper core sections indicated the presence of biomass combustion while the upper core sections indicated combustion of both petroleum and biomass. The PAH toxicity of one core was estimated using toxicity equivalency factors, and the benzo[a]pyrene toxic equivalence quotient totaled 2,293 ng/g-dry wt. Levels of PAHs in sediments are compared with established regulatory values and recommendations are made.
机译：下福克斯河（Lower Fox River）长达39英里，为18个县的约270,000农村居民，绿湾和威斯康星州阿普尔顿的303,000大城市居民以及造纸厂和发电厂等数个大型工业园区提供了支持。本文介绍了下福克斯河中脂肪族（正构烷烃）和芳香烃（多环芳香烃[PAHs]）以及总有机碳（TOC）的分布和浓度，以确定烃污染的来源。排除一个异常值，TOC百分比百分比在0.73至19.9％之间，平均值为6.74％。正链烷烃总量在3.51μg/ g至117μg/ g范围内，并且强烈存在奇数碳数正链烷烃比率（C25至C35的范围），表明来源来自陆上生物质。多环芳烃（PAH）的平均浓度为24,800 ng / g。高分子量PAH浓度主导了碳氢化合物污染物的分布。 PAHs的交叉图用于比较苯并[a]蒽（BaA），菊花（Chr），荧蒽（Flu），（（Pyr），蒽（Ant），菲（Phe），茚并[1]的诊断来源比率，2,3-cd] py（InP）和苯并[g，h，i] per（BghiP）的深度和面积。 PAH比随芯深而略有变化。较深的岩心部分表明存在生物质燃烧，而较高的岩心部分表明存在石油和生物质的燃烧。使用毒性当量因子估算了一个核心的PAH毒性，苯并[a] py毒性当量值总计为2,293 ng / g干重。将沉积物中PAHs的水平与既定的管理值进行比较，并提出建议。

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