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首页> 外文期刊>Journal of Environmental Science and Health >Assessment and ecological indicators of total and polycyclic aromatic hydrocarbons in the aquatic environment of lake Manzala, Egypt
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Assessment and ecological indicators of total and polycyclic aromatic hydrocarbons in the aquatic environment of lake Manzala, Egypt

机译：埃及曼萨拉湖水生环境中总和多环芳烃的评估和生态指标

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The study objective was to assess the profile of aliphatic and polycyclic aromatic hydrocarbons in the aquatic environment of Lake Manzala and to determine the potential sources and effects of these hydrocarbons. To reach these objectives 24 surface sediment and 24 tilapia fish were collected and analyzed using GC-FID and GC-MS. The highest concentrations for n-alkanes (Sigma n-C15-35) (19,625 ng g(-1)) and PAHs (Sigma 45PAHs) (5,153 ng g(-1)) were found in sediments collected from Bahr Al-Baqar drain while Al-Temsah and Al-Hamra sites contained the lowest concentrations. Different diagnostic molecular ratios for hydrocarbons were used to evaluate sources of the hydrocarbons. The hydrocarbons were found to have differing proportions of petrogenic, pyrogenic, and biogenic sources. Comparison to sediment quality guidelines indicated PAHs were below the effect range low (ERL) with the exception of acenaphthene, fluorine, and Sigma 45PAHs in Bahr Al-Baqar drain sediments. Tissue samples had moderate PAH concentrations for Sigma 45PAHs ranging from 302.5 ng g(-1) West of Bashteer (S3) to 596 ng g(-1) in Legam (S5). Since fish metabolize PAH quickly, their detection suggest continual or very recent exposure. The PAH in sediment and fish from Lake Manzala are at a low or below level of environmental concern.
机译：研究目的是评估曼萨拉湖水生环境中脂族和多环芳烃的分布，并确定这些烃的潜在来源和影响。为了达到这些目标，收集了24条表面沉积物和24条罗非鱼，并使用GC-FID和GC-MS进行了分析。在从Bahr Al-Baqar排水渠收集的沉积物中发现正构烷烃（Sigma n-C15-35）（19,625 ng g（-1））和PAHs（Sigma 45PAHs）（5,153 ng g（-1））的最高浓度。 Al-Temsah和Al-Hamra站点的浓度最低。碳氢化合物的不同诊断分子比率用于评估碳氢化合物的来源。发现碳氢化合物的成因，热成因和生物成因来源比例不同。与沉积物质量指南的比较表明，除了Bahr Al-Baqar排水沉积物中的ena，氟和Sigma 45PAHs以外，PAHs均低于有效范围（ERL）。组织样本中Sigma 45PAH的PAH浓度适中，从Bashteer（S3）西部的302.5 ng g（-1）到Legam（S5）的596 ng g（-1）。由于鱼类会迅速代谢多环芳烃，因此对其的检测表明持续或非常近期的接触。来自曼萨拉湖的沉积物和鱼类中的PAH处于或低于环境关注水平。

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