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首页> 外文期刊>Environment international >Natural and anthropogenic hydrocarbon inputs to sediments of Patos Lagoon Estuary, Brazil
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Natural and anthropogenic hydrocarbon inputs to sediments of Patos Lagoon Estuary, Brazil

机译：巴西帕托斯泻湖河口沉积物中的天然和人为碳氢化合物输入

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The Patos Lagoon Estuary, southern Brazil, is an area of environmental interest not only because of tourism, but also because of the presence of the second major port of Brazil, with the related industrial and shipping activities. Thus, potential hydrocarbon pollution was examined in this study. Sediment samples were collected at 10 sites in the estuary, extracted, and analyzed by GC-FID and GC-MS for composition and concentration of the following organic geochemical markers: normal and isoprenoid alkanes, petroleum biomarkers, linear alkylbenzenes (LABs), and polycyclic aromatic hydrocarbons (PAHs). The total concentrations varied from 1.1 to 129.6 μg g~(-1) for aliphatic hydrocarbons, from 17.8 to 4510.6 ng g~(-1) for petroleum biomarkers, from 3.2 to 1601.9 ng g~(-1) for LABs, and from 37.7 to 11,779.9 ng g~(-1) for PAHs. Natural hydrocarbons were mainly derived from planktonic inputs due to a usual development of blooms in the estuary. Terrestrial plant wax compounds prevailed at sites located far from Rio Grande City and subject to stronger currents. Anthropogenic hydrocarbons are related to combustion/pyrolysis processes of fossil fuel, release of unburned oil products and domestic/industrial waste outfalls. Anthropogenic hydrocarbon inputs were more apparent at sites associated with industrial discharges (petroleum distributor and refinery), shipping activities (dry docking), and sewage outfalls (sewage). The overall concentrations of anthropogenic hydrocarbons revealed moderate to high hydrocarbon pollution in the study area.
机译：巴西南部的Patos泻湖河口不仅对旅游业具有环保意义，而且还因为巴西第二大港口以及相关的工业和航运活动而引起了人们的关注。因此，在这项研究中检查了潜在的碳氢化合物污染。在河口的10个地点收集沉积物样品，提取并通过GC-FID和GC-MS分析以下有机地球化学标记物的组成和浓度：正构和异戊二烯烷烃，石油生物标志物，线性烷基苯（LABs）和多环芳香烃（PAHs）。脂族烃的总浓度从1.1到129.6μgg（-1），石油生物标志物的总浓度从17.8到4510.6 ng g（-1），LABs从3.2到1601.9 ng g（（-1））， PAHs为37.7至11,779.9 ng g〜（-1）。天然碳氢化合物主要是由于河口水华的正常发展而来自浮游生物。陆地植物蜡化合物盛行于远离里奥格兰德市的地点，并受到潮流的影响。人为碳氢化合物与化石燃料的燃烧/热解过程，未燃烧的石油产品的释放以及家庭/工业废物排放有关。人为碳氢化合物的输入在与工业排放（石油分配器和炼油厂），航运活动（干坞）和污水排污口（污水）相关的地点更为明显。在研究区内，人为碳氢化合物的总浓度显示出中等至高度的碳氢化合物污染。

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