Special Issue on Carbonaceous Aerosols in the Atmosphere (II)

Liyan Ma1, Dongmei Hu This email address is being protected from spambots. You need JavaScript enabled to view it.1, Yulong Yan2,3, Yueyuan Niu1, Xiaolin Duan1, Yafei Guo1, Wanhua Li1, Lin Peng2,3 

1 Key Laboratory of Resources and Environmental Systems Optimization, Ministry of Education, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
2 Engineering Research Center of Clean and Low-carbon Technology for Intelligent Transportation, Ministry of Education, School of Environment, Beijing Jiaotong University, Beijing 100044, China
3 Institute of Transport Energy and Environment, Beijing Jiaotong University, Beijing 100044, China


Received: January 14, 2024
Revised: March 6, 2024
Accepted: March 10, 2024

 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.240014  

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Cite this article:

Ma, L., Hu, D., Yan, Y., Niu, Y., Duan, X., Guo, Y., Li, W., Peng, L. (2024). Pollution Characteristics and Source Analysis of Carbonaceous Components in PM2.5 in a Typical Industrial City. Aerosol Air Qual. Res. 24, 240014. https://doi.org/10.4209/aaqr.240014


HIGHLIGHTS

  • Strong seasonal and diurnal variations in carbonaceous components were observed.
  • Quantitative calculation of POC and SOC in PM2.5.
  • There were significant differences in the formation of SOC in different seasons.
  • Carbon components in winter were mainly influenced by coal combustion emissions.
 

ABSTRACT


Carbonaceous components are important components of fine atmospheric particulate matter (PM2.5) and can affect the local environment, climate, and human health. In this study, online observation data from September 1, 2022, to August 31, 2023, were used to analyze the carbonaceous components, namely, organic carbon (OC) and elemental carbon (EC), in PM2.5 in Jincheng, which is a typical industrial city. The OC and EC concentrations and annual average ratio of OC/EC in Jincheng were 5.54 µg m–3, 0.98 µg m–3, and 5.67, respectively. The concentration change in carbonaceous components shows strong seasonality and daily variation characteristics, and the influence of biomass combustion on carbonaceous components in winter cannot be ignored. OC was divided into primary organic carbon (POC) and secondary organic carbon (SOC) using the minimum R squared (MRS) method, and the highest and lowest amounts of SOC were generated in winter and summer, respectively. However, owing to the photochemical reaction that produces SOC in summer, the SOC/OC ratio was high. The high OC/EC ratio in summer was strongly dependent on the O3 concentration, proving that more SOC was formed through photochemical oxidation in summer, and multi-phase inversion may be the main method of SOC generation in winter. Correlation analysis between the carbonaceous components and gaseous pollutants in Jincheng showed that the carbon components in Jincheng City in autumn and winter were significantly influenced by industrial emissions, coal combustion emissions and vehicle emissions. Vehicle emissions were the main source of carbon components in Jincheng during summer. The formation of SOC was related to other VOCs emission sources. Our results show that carbon aerosol pollution in typical industrial cities, such as Jincheng, can be further alleviated by strengthening the control of vehicle exhaust emissions, fuel combustion, and biomass combustion.


Keywords: Carbonaceous components, Pollution characteristics, SOC estimation, Source analysis, Industrial city




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