Oil spills from pipeline accidents can result in long-lasting health effect in the people living in a ‎polluted region‎. In this study, the level of the 16 US EPA priority polycyclic aromatic hydrocarbons (PAHs‎) and heavy metals (HMs) have been ‎analyzed in environmental matrices of a region with frequent oil ‎pipeline accidents in Iran‎.‎ The results showed that the mean ‎concentration of ΣPAHs and ΣHMs decreased from the upstream to the downstream and also the levels were ‎higher in the wet season than those in the dry season. The average concentration of HMs in sediments was higher than that in other ‎environments. The 3-ring and 4-ring PAHs were dominant in all of the studied matrices with the average values of 32.61 % and 45.85 %, respectively. The ecological risks of PAHs and HMs were medium and high in all matrices, respectively. In wet season, the total cancer risk (TCR) related to PAHs in agricultural soil was greater than 10, whereas it’s very close to the threshold for HMs in water. This study offers a reference for assessing the long-term impact of oil spills in contaminated environmental matrices. The results are crucial for developing effective strategies to mitigate oil pollution ‎impacts and protect environmental and public health.

中文翻译：

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伊朗长期石油污染地区各种环境基质中多环芳烃和重金属的共存；污染特征以及生态和人类健康风险评估


管道事故造成的石油泄漏可能会对生活在“污染地区”的人们造成长期的健康影响。在这项研究中，对伊朗石油管道事故频繁地区的环境矩阵中 16 种美国 EPA 重点关注的多环芳烃 (PAHs‎) 和重金属 (HMs) 的水平进行了分析。结果表明： ΣPAHs和ΣHMs的平均浓度从上游到下游逐渐降低，并且雨季的水平高于旱季。沉积物中重金属的平均浓度高于其他环境。 3 环和 4 环 PAH 在所有研究的基质中占主导地位，平均值分别为 32.61 % 和 45.85 %。所有基质中 PAHs 和 HMs 的生态风险分别为中度和高度。在雨季，农业土壤中与PAHs相关的总癌症风险（TCR）大于10，而与水中HMs的阈值非常接近。该研究为评估石油泄漏对受污染环境基质的长期影响提供了参考。研究结果对于制定有效的战略来减轻石油污染影响并保护环境和公众健康至关重要。