Characteristics and source apportionment of fine haze aerosol in Beijing during the winter of 2013

Xiaona Shang, Kai Zhang, Fan Meng, Shihao Wang, Meehye Lee, Inseon Suh, Daigon Kim, Kwonho Jeon, Hyunju Park, Xuezhong Wang, Yuxi Zhao

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

For PM2.5 filter samples collected daily at the Chinese Research Academy of Environmental Sciences (Beijing, China) from December of 2013 to February of 2014 (the winter period), chemical characteristics and sources were investigated with an emphasis on haze events in different alert levels. During the 3 months, the average PM2.5 concentration was 89 μg m-3, exceeding the Chinese national standard of 75 μg m-3 in 24 h. The maximum PM2.5 concentration was 307 μg m-3, which characterizes developed-type pollution (PM2.5 / PM10> 0.5) in the World Health Organization criteria. PM2.5 was dominated by SO42-, NO3-, and pseudo-carbonaceous compounds with obvious differences in concentrations and proportions between non-haze and haze episodes. The non-negative matrix factorization (NMF) analysis provided reasonable PM2.5 source profiles, by which five sources were identified: soil dust, traffic emission, biomass combustion, industrial emission, and coal combustion accounting for 13, 22, 12, 28, and 25 % of the total, respectively. The dust impact increased with northwesterlies during non-haze periods and decreased under stagnant conditions during haze periods. A blue alert of heavy air pollution was characterized by the greatest contribution from industrial emissions (61 %). During the Chinese Lantern Festival, an orange alert was issued and biomass combustion was found to be the major source owing to firework explosions. Red-alert haze was almost equally contributed by local traffic and transported coal combustion emissions from the vicinity of Beijing (approximately 40 % each) that was distinguished by the highest levels of NO3- and SO42-, respectively. This study also reveals that the severity and source of haze are largely dependent on meteorological conditions.

Original languageEnglish
Pages (from-to)2573-2584
Number of pages12
JournalAtmospheric Chemistry and Physics
Volume18
Issue number4
DOIs
Publication statusPublished - 2018 Feb 21

Bibliographical note

Funding Information:
Acknowledgements. This study was performed as part of a China-Korea joint research project on air quality. Special thanks to the Chinese Research Academy of Environmental Sciences (CRAES) members including Pengli Duan, Fenmei Xia, Hongjiao Li, Zilong Zheng, Jing Zhou, Qingshu Ke, Jiaying Yang, and Jikang Wang, for help with sampling in Beijing. Kai Zhang would like to acknowledge support from the National Natural Science Foundation of China (no. 41205093), the National Department Public Benefit Research Foundation (no. 201109005), and the Fundamental Research Funds for Central Public Welfare Scientific Research Institutes of China (no. 2016YSKY-025). This work was supported by a grant from the National Institute of Environmental Research (NIER), funded by the Ministry of Environment (MOE) of the Republic of Korea (NIER-2015-02-02-069). Meehye Lee also shows thanks for the support by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, Information, and Communications Technology & Future Planning (NRF-2017R1A2B4012143).

Publisher Copyright:
© Author(s) 2018.

ASJC Scopus subject areas

  • Atmospheric Science

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