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Huan Jing Ke Xue

Title:		[Research Progress of SOA Formation from Anthropogenic VOCs Under Complex Pollution Condition]
Author(s):		Chen TZ; Liu J; Ma QX; Chu BW; Zhang P; Liu YC; Liu CG; He H;
Address:		"State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China. Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China. Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China. School of Biological and Chemical Engineering, Panzhihua University, Panzhihua 617000, China"
Journal Title:		Huan Jing Ke Xue
Year:		2023
Volume:		44
Issue:		3
Page Number:		1201 - 1213
DOI:		10.13227/j.hjkx.202203217
ISSN/ISBN:		0250-3301 (Print) 0250-3301 (Linking)
Abstract:		"Although the air quality in China has been greatly improved in recent years, the air pollution remains severe. The annual mean PM(2.5) concentrations have not met the second grade of the National Ambient Air Quality Standards in China and are still much higher than the guideline value of the World Health Organization. Thus, the PM(2.5) concentration needs to be further reduced. Secondary organic aerosol (SOA) is an important component of PM(2.5) and has an important impact on air quality, global climate change, and human health. Therefore, understanding the formation mechanism of SOA is an important basis to control SOA and further reduce PM(2.5). As an important precursor of SOA, volatile organic compounds (VOCs) can be oxidized by oxidants such as .OH, NO(3)[KG-*2/3]., Cl., and O(3) to generate low volatile organic compounds and further to form SOA through gas-particle partitioning, homogeneous nucleation, aqueous phase reaction, and heterogeneous reaction processes. The formation of SOA can be affected by many factors, such as the types and initial concentrations of VOCs, VOCs/NO(x) ratios, relative humidity (RH), temperature (T), seed aerosols, oxidants, aqueous phase process, and photochemical process. The observed SOA concentration is always underestimated by air quality models because a comprehensive understanding of the complexity of SOA chemical composition and formation mechanisms is still lacking, especially that under the highly complex air pollution conditions in China. Therefore, the formation mechanism and influencing factors of SOA under highly complex air pollution conditions have become an important concern in the field of atmospheric sciences. Recently, much laboratory work has focused on the formation of SOA under complex conditions. The research progress of SOA formation from different anthropogenic VOCs are reviewed here, and the methods used and the impact of different influencing factors on SOA formation are introduced. Finally, the key scientific issues that exist in the research of the SOA mechanism at present are put forward, and the future research direction is projected"
Keywords:		Pm2.5 complex pollution secondary organic aerosol (SOA) smog chamber volatile organic compounds (VOCs);
Notes:		"PubMed-not-MEDLINEChen, Tian-Zeng Liu, Jun Ma, Qing-Xin Chu, Bi-Wu Zhang, Peng Liu, Yong-Chun Liu, Chang-Geng He, Hong chi English Abstract China 2023/03/16 Huan Jing Ke Xue. 2023 Mar 8; 44(3):1201-1213. doi: 10.13227/j.hjkx.202203217"