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首页> 外文期刊>Environmental forensics >Organic Geochemistry of the Angra dos Reis Marine Sediments: Aliphatic and Polycyclic Aromatic Hydrocarbons
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Organic Geochemistry of the Angra dos Reis Marine Sediments: Aliphatic and Polycyclic Aromatic Hydrocarbons

机译：Angra dos Reis海洋沉积物的有机地球化学：脂肪族和多环芳烃

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Angra dos Reis City, Rio de Janeiro State, Brazil, is an area of environmental interest due to the great tourist activity, mainly nautical. Also, Angra dos Reis is of economic importance based on its oil terminal, harbor, shipyard, and nuclear power plant. For this reason, the composition and levels of selected organic geochemical markers such as aliphatic hydrocarbons (total and linear alkanes), petroleum biomarkers (hopanes, steranes) and polycyclic aromatic hydrocarbons (PAHs) were determined in order to determine baseline data for future management strategies. Sediment samples were collected at six sites, extracted, and analyzed by gas chromatography/mass spectrometry and gas chromatography/flame ionization detection. Concentrations varied from 14.5－464.9 μg/g for total aliphatic hydrocarbons (TAH, total detector response), from 0.3 to 29.4 μg/g for linear alkanes, from 13.3 to 677.5 ng/g for sum of hopanes plus steranes (petroleum biomarkers), and from 6.3 to 277.0 ng/g for PAHs (sum of 15 individual PAH) in sediment samples (dry weight). The sites most impacted by petroleum and PAH contamination were the harbor/shipyard, the yacht club, and the oil terminal, in this order, where boating and shipping activities are highest. In contrast, the level for TAH was surpassed at the yacht club site and was at the limiting value of 100 μg/g in the harbor. All six sites are contaminated by petroleum hydrocarbons (hopanes, steranes, unresolved complex mixture, PAHs). Two of the sites were classified as polluted when both the concentration of TAHs and PAHs are considered; two of them were considered at background level of these hydrocarbon compounds, Pimenta and Aquidaba (18.2 and 13.3 ng/g hopanes/steranes; 24.6 and 16.5 μg/g TAH; 8.7 and 6.3 ng/g PAH). The overall concentrations of anthropogenic hydrocarbons revealed low to moderate hydrocarbon pollution in the studied area, considering mainly the TAH and PAHs.
机译：巴西的里约热内卢州的安格拉·多斯·雷斯城由于旅游活动活跃，主要是航海活动，因此成为了一个环保胜地。此外，安格拉·多斯·雷斯（Angra dos Reis）的石油码头，港口，造船厂和核电站也具有重要的经济意义。因此，确定了选定的有机地球化学标记物的成分和含量，例如脂族烃（总和线性烷烃），石油生物标记物（庚烷，甾烷）和多环芳烃（PAHs），以便确定用于未来管理策略的基准数据。在六个位置收集沉积物样品，提取并通过气相色谱/质谱和气相色谱/火焰电离检测进行分析。总脂肪烃的浓度范围为14.5－464.9μg/ g（TAH，总检测器响应），线性烷烃的浓度范围为0.3至29.4μg/ g，hop烷和甾烷（石油生物标志物）之和为13.3至677.5 ng / g，沉积物样品（干重）中的多环芳烃（15个单独的多环芳烃的总和）为6.3至277.0 ng / g。受石油和多环芳烃污染影响最大的站点是港口/造船厂，游艇俱乐部和油码头，按顺序排列，其中划船和航运活动最多。相反，在游艇俱乐部现场，TAH的含量超过了极限，在港口中的极限值为100μg/ g。所有六个场所均被石油碳氢化合物（庚烷，甾烷，未解析的复杂混合物，PAHs）污染。当同时考虑TAHs和PAHs的浓度时，其中两个位点被归类为污染；其中两个被认为是这些碳氢化合物的背景水平，即皮门塔和阿基达巴（分别为18.2和13.3 ng / g hop烷/甾烷； 24.6和16.5μg/ g TAH； 8.7和6.3 ng / g PAH）。在研究区域，主要考虑TAH和PAH，人为碳氢化合物的总体浓度显示出低至中等的碳氢化合物污染。

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