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Characterization of PM2.5-bound parent and oxygenated PAHs in three cities under the implementation of Clean Air Action in Northern China

  • Dapeng Li
  • , Yu Zhao
  • , Wei Du*
  • , Yong Zhang
  • , Yubao Chen
  • , Yali Lei
  • , Can Wu
  • , Gehui Wang
  • *此作品的通讯作者
  • East China Normal University
  • CAS - Institute of Earth Environment
  • Institute of Eco-Chongming

科研成果: 期刊稿件文章同行评审

摘要

Ambient polycyclic aromatic hydrocarbons (PAHs) and oxygenated PAHs (oPAHs) could act as carcinogenic substances and cause severe health outcome on human beings through inhalation exposure. To protect human health, China government implemented strict control actions (Air Pollution Prevention and Control Action Plan, APPC) to reduce air pollutants emission. Notable achievement of PM2.5 pollution reduction was reported in several studies, while the pollution characteristics of non-routine monitoring PAHs and oPAHs under the impact of APCC were poorly understood. In this study, daily PM2.5 samples in three Chinese cites (Xingtai, Liaocheng, and Heze) were collected for one month in four seasons form 2018–2019 and determined for the PM2.5-bound PAHs and oPAHs. The results showed that the annual PAHs and oPAHs were 58.3 ± 86.1 and 62.7 ± 75.2 ng/m3 in Xingtai, 36.2 ± 55.6 and 35.9 ± 28.3 ng/m3 in Liaocheng, and 24.5 ± 37.7 and 35.1 ± 24.7 ng/m3 in Heze, respectively, suggesting that the PAHs pollution in the measured cities was still considerable and more solid control measures are needed. Significant variations in seasonal concentrations were observed in all the cities with the highest occurring in winter, which is mainly due to solid fuel burning for house heating. Meanwhile, composition profiles of PAHs and oPAHs also showed significant seasonal variations due to the source differences in different seasons. The results of PMF model showed both vehicle exhausts emission and solid fuels burning dominated the PAHs pollution. In summer, vehicles were the major contributor to the total PAHs pollution, while in winter, the contribution of coal combustion emission increased sharply. The correlations analysis between PAHs (oPAHs) and K+ and hopanes also showed a stronger impact of coal combustion in winter time. The result of this study confirmed the goal of clean air in China was calling for continuous actions.

源语言英语
文章编号105932
期刊Atmospheric Research
267
DOI
出版状态已出版 - 1 4月 2022
已对外发布

联合国可持续发展目标

此成果有助于实现下列可持续发展目标:

  1. 可持续发展目标 3 - 良好健康与福祉
    可持续发展目标 3 良好健康与福祉
  2. 可持续发展目标 11 - 可持续城市和社区
    可持续发展目标 11 可持续城市和社区

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