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<p>To comprehensively investigate the concentrations, characteristics, sources, and health implications of polycyclic aromatic hydrocarbons (PAHs) in Bengbu, an extensive was conducted from October 2021 to September 2022. A total of 343 PM<sub>2.5</sub> samples were collected and the 16 priority PAHs were measured by gas chromatography-mass spectrometry (GC–MS). The mean concentrations of the total airborne PAHs varied seasonally, with levels of 3.65 ± 3.11&#xa0;ng/m<sup>3</sup> in spring, 1.96 ± 0.56&#xa0;ng/m<sup>3</sup> in summer, 5.38 ± 3.47&#xa0;ng/m<sup>3</sup> in autumn, and 14.47 ± 7.13&#xa0;ng/m<sup>3</sup> in winter, resulting in an annual average of 6.47 ± 6.47&#xa0;ng/m<sup>3</sup>. The PAHs were positively correlated with PM<sub>2.5</sub>, NO<sub>2</sub>, CO and SO<sub>2</sub> (<i>p</i> &lt; 0.05), but were negatively correlated with O<sub>3</sub> and temperature (<i>p</i> &lt; 0.05). Traffic emissions, coal and biomass combustion, and petroleum volatilization were the main sources of PAHs in Bengbu, with these sources contributing 44.1%, 31.6%, and 24.2% to the annual average concentrations, respectively. The Yangtze River Delta region was the primary source area of PAH pollution during summer, while North China had more influence as a source area during the other seasons. The average annual incremental lifetime cancer risk (ILCR) reached 6.94 × 10<sup>–5</sup>, indicating a potential carcinogenic risk for adults. Transportation sources had the most influence on the ILCR and were responsible for 48.71% of the total PAHs.</p>

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Characterization, Sources, and Risk Assessment of PM2.5-bound Polycyclic Aromatic Hydrocarbons in Bengbu, China

  • 期刊论文

  • 发表日期：

    2025年4月26日

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  • Dalin Zhou,
  • Liu Chen,
  • Wanru Wang,
  • Haitao Diao,
  • Danchen Wu,
  • Zhijing Ma,
  • Mengmeng Liu,
  • Tianer Zhang,
  • Jing Yang,
  • Quan Zhen

摘要

To comprehensively investigate the concentrations, characteristics, sources, and health implications of polycyclic aromatic hydrocarbons (PAHs) in Bengbu, an extensive was conducted from October 2021 to September 2022. A total of 343 PM2.5 samples were collected and the 16 priority PAHs were measured by gas chromatography-mass spectrometry (GC–MS). The mean concentrations of the total airborne PAHs varied seasonally, with levels of 3.65 ± 3.11 ng/m3 in spring, 1.96 ± 0.56 ng/m3 in summer, 5.38 ± 3.47 ng/m3 in autumn, and 14.47 ± 7.13 ng/m3 in winter, resulting in an annual average of 6.47 ± 6.47 ng/m3. The PAHs were positively correlated with PM2.5, NO2, CO and SO2 (p < 0.05), but were negatively correlated with O3 and temperature (p < 0.05). Traffic emissions, coal and biomass combustion, and petroleum volatilization were the main sources of PAHs in Bengbu, with these sources contributing 44.1%, 31.6%, and 24.2% to the annual average concentrations, respectively. The Yangtze River Delta region was the primary source area of PAH pollution during summer, while North China had more influence as a source area during the other seasons. The average annual incremental lifetime cancer risk (ILCR) reached 6.94 × 10–5, indicating a potential carcinogenic risk for adults. Transportation sources had the most influence on the ILCR and were responsible for 48.71% of the total PAHs.