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Environ Sci Technol

Title:		Contribution of Atmospheric Oxygenated Organic Compounds to Particle Growth in an Urban Environment
Author(s):		Qiao X; Yan C; Li X; Guo Y; Yin R; Deng C; Li C; Nie W; Wang M; Cai R; Huang D; Wang Z; Yao L; Worsnop DR; Bianchi F; Liu Y; Donahue NM; Kulmala M; Jiang J;
Address:		"State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, 100084 Beijing, P. R. China. Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland. Aerosol and Haze Laboratory, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, 100029 Beijing, P. R. China. Joint International research Laboratory of Atmospheric and Earth System Research, School of Atmospheric Sciences, Nanjing University, Nanjing 210023, P. R. China. Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States. State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai 200233, P. R. China. Division of Environment and Sustainability, The Hong Kong University of Science and Technology, Hong Kong SAR 999077, P. R. China. Aerodyne Research Incoporated, Billerica, Massachusetts 01821, United States. Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States"
Journal Title:		Environ Sci Technol
Year:		2021
Volume:		20210929
Issue:		20
Page Number:		13646 - 13656
DOI:		10.1021/acs.est.1c02095
ISSN/ISBN:		1520-5851 (Electronic) 0013-936X (Linking)
Abstract:		"Gas-phase oxygenated organic molecules (OOMs) can contribute substantially to the growth of newly formed particles. However, the characteristics of OOMs and their contributions to particle growth rate are not well understood in urban areas, which have complex anthropogenic emissions and atmospheric conditions. We performed long-term measurement of gas-phase OOMs in urban Beijing during 2018-2019 using nitrate-based chemical ionization mass spectrometry. OOM concentrations showed clear seasonal variations, with the highest in the summer and the lowest in the winter. Correspondingly, calculated particle growth rates due to OOM condensation were highest in summer, followed by spring, autumn, and winter. One prominent feature of OOMs in this urban environment was a high fraction ( approximately 75%) of nitrogen-containing OOMs. These nitrogen-containing OOMs contributed only 50-60% of the total growth rate led by OOM condensation, owing to their slightly higher volatility than non-nitrate OOMs. By comparing the calculated condensation growth rates and the observed particle growth rates, we showed that sulfuric acid and its clusters are the main contributors to the growth of sub-3 nm particles, with OOMs significantly promoting the growth of 3-25 nm particles. In wintertime Beijing, however, there are missing contributors to the growth of particles above 3 nm, which remain to be further investigated"
Keywords:		Aerosols/analysis *Air Pollutants/analysis Environmental Monitoring Organic Chemicals/analysis Particle Size Particulate Matter/analysis Seasons nitrogen-containing OOMs oxygenated organic molecules particle growth seasonal variation urban environment;
Notes:		"MedlineQiao, Xiaohui Yan, Chao Li, Xiaoxiao Guo, YiShuo Yin, Rujing Deng, Chenjuan Li, Chang Nie, Wei Wang, Mingyi Cai, Runlong Huang, Dandan Wang, Zhe Yao, Lei Worsnop, Douglas R Bianchi, Federico Liu, Yongchun Donahue, Neil M Kulmala, Markku Jiang, Jingkun eng Research Support, Non-U.S. Gov't 2021/09/30 Environ Sci Technol. 2021 Oct 19; 55(20):13646-13656. doi: 10.1021/acs.est.1c02095. Epub 2021 Sep 29"