ABSTRACT This study identified concentrations, molecular distributions, toxicities, and sources of polycylic aromatic hydrocarbons (PAHs) in street dust from different land use of Bushehr city in southwest of Iran. For this purpose, 19 street dust samples were collected from different land use of the city and analyzed using GC–MS. Σ16PAHs (16 USEPA priority PAHs) concentrations ranged between 73.6 and 9491 µg kg−1, with a mean of 1116.02 µg kg−1. The high-molecular-weight (HMW) PAHs (4–6 rings), that make 65.22% of the total, were the dominant in almost all dust samples. In the northern part of the city, the concentration of PAHs especially HMW is high, reflecting high traffic density. PAH sources were identified statistically. It is demonstrated that the PAHs in Bushehr street dust are mainly petrogenic derived from traffic emission. A significant positive correlation coefficient also exists between the ∑PAH concentration and toxic equivalency concentration (TEQ). Estimated incremental lifetime cancer risk (ILCR) results indicated that Bushehr residents are potentially exposed to a high cancer risk, especially via dust ingestion and dermal contact.

中文翻译：

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伊朗布什尔市街道灰尘中的多环芳烃：现状、来源和人类健康风险评估

摘要 本研究确定了伊朗西南部布什尔市不同土地用途的街道灰尘中多环芳烃 (PAH) 的浓度、分子分布、毒性和来源。为此，从城市的不同土地利用中收集了 19 个街道灰尘样本，并使用 GC-MS 进行了分析。Σ16PAHs（美国环保局优先考虑的 16 种多环芳烃）浓度介于 73.6 和 9491 µg kg-1 之间，平均值为 1116.02 µg kg-1。占总量 65.22% 的高分子量 (HMW) 多环芳烃（4-6 环）在几乎所有灰尘样品中占主导地位。在城市北部，PAHs 尤其是 HMW 的浓度很高，反映了高交通密度。多环芳烃来源被统计确定。结果表明，布什尔街道灰尘中的多环芳烃主要是来自交通排放的岩源性物质。∑PAH 浓度与毒性当量浓度 (TEQ) 之间也存在显着的正相关系数。估计的终生癌症风险增量 (ILCR) 结果表明，布什尔居民可能面临高癌症风险，尤其是通过摄入灰尘和皮肤接触。