Yiting Wang, Yong Zhang, Xia Li, Junji Cao This email address is being protected from spambots. You need JavaScript enabled to view it.

Key Laboratory of Aerosol Chemistry & Physics (KLACP), Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China

Received: April 14, 2020
Revised: September 26, 2020
Accepted: September 26, 2020

 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.2020.04.0146  

Cite this article:

Wang, Y., Zhang, Y., Li, X., Cao, J. (2021). Refined Source Apportionment of Atmospheric PM2.5 in a Typical City in Northwest China. Aerosol Air Qual. Res. 20, 200146. https://doi.org/10.4209/aaqr.2020.04.0146


  • The sources for PM2.5 were evaluated by using the CAS-HERM receptor model for XXND.
  • Estimate the contributions of local and regional emissions via WRF-CHEM model.
  • A refined source apportionment was done for PM2.5 for XXND.


The Xixian New District (XXND), established in 2014, is the seventh national-level new district in China, but research on air pollution there has been limited. This study focused on the characteristics and sources of PM2.5 in XXND from 2017 to 2018. The average annual PM2.5 mass was 67 µg m3; loadings were high in winter and low in summer. Organic carbon (18.2%), nitrate (17.0%), and sulfate (13.1%) were the main chemical components of PM2.5. A refined statistical assessment of sources was conducted using the CAS-HERM receptor model, and it showed that primary sources accounted for ~58.5% of the PM2.5 annual mass, of which dust accounted for 23.3% (road, construction, and soil dust accounted for 11.4%, 8.0% and 3.9%, respectively) while motor vehicles contributed 10.1% (diesels 8.7% and gasoline vehicles 1.4%). Secondary sources for sulfates, nitrates, and organic aerosols accounted for ~41.5% of the PM2.5 mass. A complementary analysis using the WRF-CHEM model showed that regional transport accounted for 60.8% of the PM2.5 during the winter high-pollution period, which also implies the importance of secondary aerosols.

Keywords: Xixian new district, PM2.5, CAS-HERM, WRF-CHEM

Don't forget to share this article 


Subscribe to our Newsletter 

Aerosol and Air Quality Research has published over 2,000 peer-reviewed articles. Enter your email address to receive latest updates and research articles to your inbox every second week.

Latest coronavirus research from Aerosol and Air Quality Research

2018 Impact Factor: 2.735

5-Year Impact Factor: 2.827

SCImago Journal & Country Rank

Aerosol and Air Quality Research (AAQR) is an independently-run non-profit journal, promotes submissions of high-quality research, and strives to be one of the leading aerosol and air quality open-access journals in the world.