Jihong Wei This email address is being protected from spambots. You need JavaScript enabled to view it.1, Ting Hou1, Zhiyong Li This email address is being protected from spambots. You need JavaScript enabled to view it.2,3, Songtao Guo2, Zhenxin Li2

1 Department of Pediatrics, Affiliated Hospital of Hebei University, Baoding 071000, China
2 Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, China
3 MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China


Received: March 6, 2022
Revised: April 27, 2022
Accepted: May 6, 2022

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.


Download Citation: ||https://doi.org/10.4209/aaqr.220114  


Cite this article:

Wei, J., Hou, T., Li, Z., Guo, S., Li, Z. (2022). Changes in Chemical Composition, Sources, and Health Risk of PM2.5 with Sand Storm at a Small City in North China. Aerosol Air Qual. Res. 22, 220114. https://doi.org/10.4209/aaqr.220114


HIGHLIGHTS

  • Impacts of sand storm (SS) on particles were evaluated.
  • Dust, OC, and trace elements increased in SS period (SSP).
  • Non-carcinogenic risks increased in SSP.
  • Sand dust dominated in PM2.5 sources in SSP.
 

ABSTRACT


Sand storm (SS) is highly concerned based on its adverse impacts on environment and health. A field observation was conducted in Dingxing County within the Beijing-Tianjin-Hebei region from 16 March to 9 April 2021 covering two SS episodes to evaluate the SS impacts on PM2.5 components, health risks, and sources. From the non-SS period (NSSP) to the SS period (SSP), more increase was found in PM10 (114–300 µg m–3) than PM2.5 (61.5–75.2 µg m–3), suggesting the obvious increment of coarse particles (PM2.5-10) in the SSP. PM2.5 reconstruction indicated that higher dust of 54.0 µg m–3 and trace element oxides (TEO) of 0.234 µg m–3 were found in the SSP, evidencing their immigration from the sand dust. In consequence, the elevated exposure risks via inhalation including carcinogenic and non-carcinogenic were found in the SSP. More attention should be paid to high non-carcinogenic risks of 2.49 for adults and children in the SSP. Again, the concentrations of organic carbon (OC) and secondary organic carbon (SOC) increased in the SSP, especially in the case of SOC. High usage of coal and biomass for heating purpose in Mongolia and Inner Mongolia might be an explanation. However, the mass contributions of nine water-soluble ions to PM2.5 decreased from 54.0% to 33.5% due to their low contents in sand dust. Seven sources including construction dust (CD), biomass burning (BB), secondary inorganic aerosols (SIA), industrial emissions (IN), vehicle emissions (VE), coal combustion (CC), and soil dust (SD) were recognized by positive matrix factorization (PMF) model. SD was the biggest contributor in the SSP and accounted for 68.8% of the PM2.5 mass. VE contributed highest to PM2.5 in NSSP, indicating the effective emission control on industries and coal combustion.


Keywords: Sand storm, PM2.5, Beijing-Tianjin-Hebei, Positive matrix factorization, Exposure risk




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