Journal of Shandong University (Health Sciences) ›› 2021, Vol. 59 ›› Issue (12): 70-77.doi: 10.6040/j.issn.1671-7554.0.2021.1079

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Pollution characteristics and health risk assessment of metals and metalloids in PM2.5 in two districts of Zhengzhou

YANG Siyu, YAN Xiaona, PENG Jing, ZHANG Jie, WANG Yongxing, ZHANG Xinye, ZHANG Shufang   

  1. Department of Public Health, Henan Provincial Center for Disease Control and Prevention, Zhengzhou 450016, Henan, China
  • Published:2021-12-29

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Abstract: Objective To investigate the characteristics and sources of metals and metalloids in PM2.5 in Zhengzhou and the carcinogenic risk and noncarcinogenic risk through inhalation route. Methods Ambient PM2.5 was collected and weighed in Erqi District and Jingkai District in 2019 and 12 kinds of metals and metalloids in PM2.5 were measured. Source apportionment of metals and metalloids in PM2.5 were conducted and health risks were evaluated according to Technical Guide for Environmental Health Risk Assessment of Chemical Exposure(WS/T777-2021). Results In 2019, the annual average concentrations of ambient PM2.5 in Erqi District and Jingkai District were 78 μg /m3 and 81 μg/m3 respectively. The concentrations of metals and metalloids in PM2.5 from high to low were Al>Mn>Pb>As>Se>Cr>Sb>Cd>Ni>Hg>Tl>Be. The seasonal differences of most metals and metalloids were statistically significant(P<0.05), and the concentrations in heating season were higher than those in the non-heating season. Enrichment factor analysis showed that the EF value of Be in Erqi District was lower than 10. The carcinogenic risks of As, Cd and Cr were higher than 1×10-6, which were(3.0×10-5/2.9×10-5),(2.2×10-6/2.4×10-6),(4.9×10-6/3.2×10-6)in Erqi District and Jingkai District respectively. For non-carcinogenic risk, the HQ of 10 metals and metalloids were all lower than 1. Conclusion The PM2.5 content in Zhengzhou City has decreased, but there is still a certain gap compared with other areas. As, Cd and Cr have potential carcinogenic risks, which should be paid more attention to, and control measures should be taken to reduce residents exposure to possible pollution sources such as traffic, industry and coal burning.

Key words: Fine Particulate matler, Metals, Metalloids, Enrichment factor analysis, Health risk assessment

CLC Number: 

  • R122.7
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