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Environ Sci Technol

Title:		Secondary Organic Aerosol Formation from Volatile Chemical Product Emissions: Model Parameters and Contributions to Anthropogenic Aerosol
Author(s):		Sasidharan S; He Y; Akherati A; Li Q; Li W; Cocker D; McDonald BC; Coggon MM; Seltzer KM; Pye HOT; Pierce JR; Jathar SH;
Address:		"Mechanical Engineering, Colorado State University, Fort Collins, Colorado 80523, United States. State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China. State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing 100084, China. Chemical and Environmental Engineering, University of California Riverside, Riverside, California 92521, United States. Chemical Sciences Laboratory, National Oceanic and Atmospheric Administration, Boulder, Colorado 80305, United States. Office of Air and Radiation, Environmental Protection Agency, Research Triangle Park, North Carolina 27709, United States. Office of Research and Development, Environmental Protection Agency, Research Triangle Park, North Carolina 27709, United States. Atmospheric Science, Colorado State University, Fort Collins, Colorado 80521, United States"
Journal Title:		Environ Sci Technol
Year:		2023
Volume:		20230801
Issue:		32
Page Number:		11891 - 11902
DOI:		10.1021/acs.est.3c00683
ISSN/ISBN:		1520-5851 (Electronic) 0013-936X (Linking)
Abstract:		"Volatile chemical products (VCP) are an increasingly important source of hydrocarbon and oxygenated volatile organic compound (OVOC) emissions to the atmosphere, and these emissions are likely to play an important role as anthropogenic precursors for secondary organic aerosol (SOA). While the SOA from VCP hydrocarbons is often accounted for in models, the formation, evolution, and properties of SOA from VCP OVOCs remain uncertain. We use environmental chamber data and a kinetic model to develop SOA parameters for 10 OVOCs representing glycols, glycol ethers, esters, oxygenated aromatics, and amines. Model simulations suggest that the SOA mass yields for these OVOCs are of the same magnitude as widely studied SOA precursors (e.g., long-chain alkanes, monoterpenes, and single-ring aromatics), and these yields exhibit a linear correlation with the carbon number of the precursor. When combined with emissions inventories for two megacities in the United States (US) and a US-wide inventory, we find that VCP VOCs react with OH to form 0.8-2.5x as much SOA, by mass, as mobile sources. Hydrocarbons (terpenes, branched and cyclic alkanes) and OVOCs (terpenoids, glycols, glycol ethers) make up 60-75 and 25-40% of the SOA arising from VCP use, respectively. This work contributes to the growing body of knowledge focused on studying VCP VOC contributions to urban air pollution"
Keywords:		*Air Pollutants/analysis Hydrocarbons *Volatile Organic Compounds/analysis Terpenes Alkanes Aerosols/analysis Ethers China kinetic model mobile sources oxygenated volatile organic compounds particulate matter petrochemical photochemistry;
Notes:		"MedlineSasidharan, Sreejith He, Yicong Akherati, Ali Li, Qi Li, Weihua Cocker, David McDonald, Brian C Coggon, Matthew M Seltzer, Karl M Pye, Havala O T Pierce, Jeffrey R Jathar, Shantanu H eng Research Support, U.S. Gov't, Non-P.H.S. 2023/08/01 Environ Sci Technol. 2023 Aug 15; 57(32):11891-11902. doi: 10.1021/acs.est.3c00683. Epub 2023 Aug 1"