Journal of Shandong University (Health Sciences) ›› 2021, Vol. 59 ›› Issue (12): 78-86.doi: 10.6040/j.issn.1671-7554.0.2021.0872

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Trend and health risk assessment of chemical components in atmospheric PM2.5 in Shijiazhuang City from 2016 to 2020

SUN Chengyao1,2, TANG Dajing1,2, CHEN Fengge1,3, ZHAO Chuan4, GUAN Mingyang1,3   

  1. 1. Institute of Environmental Health, Shijiazhuang Center for Disease Control and Prevention, Shijiazhuang 050011, Hebei, China;
    2. School of Public Health, North China University of Science and Technology, Tangshan 063000, Hebei, China;
    3. Research Base for Environment and Health in Shijiazhuang, Chinese Center for Disease Control and Prevention, Shijiazhuang 050011, Hebei, China;
    4. The Fourth Hospital of Shijiazhuang, Shijiazhuang 050011, Hebei, China
  • Published:2021-12-29

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Abstract: Objective To analyze the trend and seasonal distribution characteristics of chemical components in fine particulate matter(PM2.5)in Shijiazhuang City, and to evaluate their potential health risks. Methods A total of 840 PM2.5 samples were collected from the roofs of teaching buildings of two primary schools within 2 km of the ambient air quality monitoring point in Shijiazhuang City from January 2016 to December 2020. The components of water-soluble inorganic ions(WSIIs), metals and metallic elements, polycyclic aromatic hydrocarbons(PAHs)in PM2.5 were detected by ion chromatography, inductively coupled plasma mass spectrometry and gas chromatography-mass spectrometry, respectively, and the health risk assessment was carried out through Technical Guide for Environmental Health Risk Assessment of Chemical Exposure(WS/T777-2021). Results The average annual concentration of PM2.5 from 2016 to 2020 showed a downward trend year by year, but still exceeded the standard limit(35 μg/m3), and it was higher in winter and autumn than in summer and spring. WSIIs had the highest content in PM2.5; the concentration of all ions basically showed a trend of gradual decline except for nitrate ion(NO3-), and showed seasonal distribution characteristics similar to PM2.5. Metals and metallic elements aluminum(Al), lead(Pb), manganese(Mn)in PM2.5 content was high, others showed a downward trend in 5 years basically except for Al and Mn, but the concentration of chromium(Cr)was still well above the standard limit, and most elements were higher in winter. The total annual concentration of 16 PAHs showed a gradual upward trend since 2016 and gradual decline after 2018, with the characteristics of higher concentrations in autumn and winter. The health risk assessment results showed that arsenic(As), Cr, and PAHs had carcinogenic risk in different years and seasons(CR>1.0×10-6), and PAHs had a higher risk of non-carcinogenicity(HQ>1). Conclusion In recent years, the air quality in Shijiazhuang has improved, but the situation is still serious. Some components in PM2.5 still exists a certain risk of carcinogenic and non-carcinogenic in the current level of exposure, and the monitoring and health risk assessment should be strengthened.

Key words: Atmosphere, Fine particulate matter, Chemical components, Trend, Health risk assessment

CLC Number: 

  • R122.7
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