Environmental Science and Engineering, Ewha Womans University, Seoul 03760, Korea.
Chemical Engineering and Materials Science, Ewha Womans University, Seoul 03760, Korea.
Int J Environ Res Public Health. 2020 Feb 21;17(4):1397. doi: 10.3390/ijerph17041397.
Polycyclic Aromatic Hydrocarbons (PAHs) and n-alkanes in particulate matter with an aerodynamic diameter of 2.5 micrometers or less (PM2.5) were quantified at Seoul, Korea in 2018. The seasonal differences in the total concentration of PAHs and n-Alkanes were clear, where winter showed a higher concentration than that of summer. Compared to the PAHs measurements in 2002 at Seoul, the sum of PAHs concentrations in 2018 were reduced from 26.6 to 5.6 ng m. Major sources of the observed PAHs and n-alkanes were deduced from various indicators such as diagnostic ratios for PAHs and Cmax, CPI, and WNA (%) indices for n-alkanes. It was found that in winter coal and biomass combustions, and vehicular exhaust were major sources, while, in summer vehicular exhaust was major source. In addition, in winter, major emission sources were located outside of Seoul. The health effect from the recent level of PAHs was estimated and compared to the previous studies observed in Seoul, and it was found that, recently, the toxicity of PAHs in PM was significantly decreased, except for in the winter.
2018 年，在韩国首尔对空气动力学直径为 2.5 微米或以下的颗粒物（PM2.5）中的多环芳烃（PAHs）和正烷烃进行了定量分析。PAHs 和正烷烃的总浓度存在明显的季节性差异，冬季的浓度高于夏季。与 2002 年在首尔进行的 PAHs 测量相比，2018 年 PAHs 浓度总和从 26.6 降至 5.6ng/m。通过各种指标，如 PAHs 的诊断比、Cmax、CPI 和正烷烃的 WNA（%）指数，推导出了观察到的 PAHs 和正烷烃的主要来源。结果表明，冬季煤炭和生物质燃烧以及汽车尾气是主要来源，而夏季汽车尾气是主要来源。此外，在冬季，主要排放源位于首尔以外。还估计了最近 PAHs 水平对健康的影响，并与之前在首尔观察到的研究进行了比较，结果发现，除冬季外，最近 PM 中 PAHs 的毒性显著降低。
