摘要 : Polycyclic aromatic hydrocarbons (PAHs), as a critical toxic component of PM2.5, have been proven to be carcinogenic to humans. Previous studies have explored the characteristics and health risk of PAHs, but long-term monitoring o... 展开 Polycyclic aromatic hydrocarbons (PAHs), as a critical toxic component of PM2.5, have been proven to be carcinogenic to humans. Previous studies have explored the characteristics and health risk of PAHs, but long-term monitoring of ambient PAHs remains limited. In this study, ambient PM2.5 was sampled each month from the 10th to 16th of January 2014 to December 2017 in an industrial area in Jinan, a heavily air-polluted city in China. We described the season and year temporal characteristics of 16 priority-control PAHs outlined by the US EPA after substantial air pollution control measures implementation. The carcinogenic risk caused by 7 PM2.5-related PAH inhaled exposure was assessed. The diagnostic ratio method was used for the source resolution of PAHs. Pair-wise Spearman's analysis was used to calculate the correlation coefficient between 16 PAHs and meteorological variables. Results showed that 16 PM2.5-related PAHs presented clearly seasonal differences with peak concentrations in the cold season. BaP accounted for the largest proportion of the total excess carcinogenic risks. 5-ring PAHs occupied the highest proportion of the 16 PAHs. Coal, wood, grass combustion and liquid fossil fuel burning all contributed to pyrogenic sources, and vehicular combustion accounted for a larger proportion of pyrogenic sources. Notably, the correlation between 16 PAHs and meteorological variables was not identical in different seasons. We concluded that air quality has been improved to some extent in Jinan, but air pollution control policies should further focus on reducing combustion product emissions, especially coal combustion. [GRAPHICS] . 收起