OCCUPATION AND HEALTH ›› 2026, Vol. 42 ›› Issue (1): 54-59.

• Treatise • Previous Articles     Next Articles

Analysis of the pollution characteristics and sources of polycyclic aromatic hydrocarbons in PM2.5 in Fengtai District of Beijing City from 2017 to 2022

SONG Wenjie1, YAN Shuai2, WANG Yujiang1, ZHANG Laiying1()   

  1. 1. Beijing Fengtai District Center for Disease Control and Prevention,Beijing 100070,China
    2. Beijing Tiantan Hospital,Capital Medical University,Beijing 100070,China
  • Received:2025-05-23 Revised:2025-06-09 Online:2026-01-01 Published:2026-02-03

Abstract:

Objective To analyze the pollution characteristics and sources of polycyclic aromatic hydrocarbons(PAHs) in fine particulate matter(PM2.5) by continuously collecting air samples from Fengtai District of Beijing City from 2017 to 2022,and provide references for air pollution prevention and control. Methods Air samples were collected from 10th to 16th every month together with haze weather to analyze the various components and pollution sources of PAHs in PM2.5 in different years,seasons,and heating periods. Results From 2017 to 2022,the average concentration of PM2.5 in Fengtai District showed a downward trend,and it was 2.6 times more in 2017 than that in 2022. The average concentration of PAHs showed a rising-decreasing-rising trend,and it was 29.0 times more in 2018 than that in 2020. The peak average concentration of PM2.5 and PAHs was mostly concentrated in winter,and the supreme of PM2.5 was in February 2017(0.175 mg/m3) while the peak average concentration of PAHs was in January 2019(121.24 ng/m3). There were statistically significant differences in the average concentrations of various components of PAHs in different years,seasons,heating periods and non-heating periods(all P<0.05). The average concentration of PAHs in winter was 14.6 times more than that in summer,and the heating period was 5.6 times more than that in non-heating period. The pollution sources in Fengtai District were mainly coal/biomass combustion sources,followed by traffic sources. Conclusion From 2017 to 2022,the concentration of PM2.5 and PAHs in the air in Fengtai District of Beijing City were decreased gradually,and the air quality was improved,but the pollution in the heating period was still more severe than that in the non-heating period,it is still necessary to strengthen the pollution sources control,especially the control of coal/biomass combustion sources.

Key words: Fine particulate matter, Polycyclic aromatic hydrocarbons, Pollution characteristics, Sources

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