In 2019, one of Brazil's most significant environmental disasters occurred, involving an oil spill that directly affected Pernambuco state. Contamination along the coast was evaluated by the quantification of polycyclic aromatic hydrocarbons (PAHs) in fifty seawater samples collected in the summer and winter of 2021. Analysis using fluorescence spectroscopy revealed that for all the samples, levels of dissolved/dispersed petroleum hydrocarbons (DDPHs) were higher than the regional baseline for tropical western shores of the Atlantic Ocean. GC–MS analyses quantified 17 PAHs in the samples, with highest total PAHs concentrations of 234 ng L in summer and 33.3 ng L in winter, which were consistent with the highest risks observed in ecotoxicity assays. The use of diagnostic ratios showed that the coast was impacted by a mixture of PAHs from petrogenic and pyrolytic sources. The results indicated the need for continuous monitoring of the regions affected by the 2019 spill.

中文翻译：

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2019 年巴西东北部伯南布哥州海岸神秘漏油事件后海水中的多环芳烃

2019年，巴西发生了最严重的环境灾难之一，漏油事件直接影响了伯南布哥州。通过对 2021 年夏季和冬季收集的 50 个海水样本中的多环芳烃 (PAH) 进行定量评估，评估了沿海污染情况。荧光光谱分析显示，所有样本中溶解/分散的石油烃 (DDPH) 水平高于大西洋热带西岸的区域基线。 GC-MS 分析定量了样品中的 17 种 PAH，其中夏季总 PAH 浓度最高为 234 ng·L，冬季为 33.3 ng·L，这与生态毒性测定中观察到的最高风险一致。诊断比率的使用表明，海岸受到来自成岩和热解来源的多环芳烃混合物的影响。结果表明需要对受 2019 年泄漏事件影响的地区进行持续监测。