State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing, 100875, China; Center of Atmospheric Environmental Studies, Beijing Normal University, Beijing, 100875, China.
State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing, 100875, China; Center of Atmospheric Environmental Studies, Beijing Normal University, Beijing, 100875, China.
Environ Pollut. 2022 Nov 15;313:120156. doi: 10.1016/j.envpol.2022.120156. Epub 2022 Sep 9.
The diurnal variation, gas-particle partitioning, health risks, and sources of polycyclic aromatic hydrocarbons (PAHs) were investigated in a northern basin city of China in winter, 2020. The mean concentrations of particulate and gaseous PAHs were 87.90 ng m and 69.65 ng m, respectively, and their concentrations were considerably enhanced during the domestic heating period. The relationship between the gas-particle partitioning coefficient of PAHs (K) and subcooled liquid vapor pressure of PAHs (P) indicated organic absorption as the mechanism for this partitioning. However, the dual sorption model confirmed adsorption onto elemental carbon (EC). The health risks indicated by several equivalent parameters showed an important health effect of PAHs, especially of particulate PAHs bound onto PM during the heating period. Environmentally persistent free radicals (EPFRs) were also studied as an auxiliary parameter to evaluate the health impact of PAHs. According to the diagnostic ratios of PAHs and PMF model results, petroleum volatilization and coal combustion were the dominant sources of particulate PAHs during the non-heating and heating periods, respectively. The source apportionment results can help efficiently control PAHs and their health risks.
2020 年冬季，在中国北方的一个盆地城市，对多环芳烃（PAHs）的日变化、气固分配、健康风险和来源进行了研究。颗粒态和气态多环芳烃的平均浓度分别为 87.90ng/m 和 69.65ng/m，在冬季供暖期间浓度显著升高。多环芳烃的气固分配系数（K）与多环芳烃的过冷液体蒸气压（P）之间的关系表明，有机吸收是这种分配的机制。然而，双吸附模型证实了元素碳（EC）的吸附。由几个等效参数表示的健康风险表明了 PAHs 的重要健康影响，特别是在供暖期间与 PM 结合的颗粒态 PAHs。环境持久性自由基（EPFRs）也被作为评估 PAHs 健康影响的辅助参数进行了研究。根据 PAHs 的比值诊断和 PMF 模型结果，石油挥发和煤炭燃烧分别是供暖期和非供暖期颗粒态 PAHs 的主要来源。来源分配结果有助于有效控制 PAHs 及其健康风险。
