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Environ Pollut

Title:		Measurement-based intermediate volatility organic compound emission inventory from on-road vehicle exhaust in China
Author(s):		Wang A; Yuan Z; Liu X; Wang M; Yang J; Sha Q; Zheng J;
Address:		"School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China. School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China. Electronic address: zibing@scut.edu.cn. Institute for Environmental and Climate Research, Jinan University, Guangzhou, 511443, China"
Journal Title:		Environ Pollut
Year:		2022
Volume:		20220803
Issue:
Page Number:		119887 -
DOI:		10.1016/j.envpol.2022.119887
ISSN/ISBN:		1873-6424 (Electronic) 0269-7491 (Linking)
Abstract:		"Intermediate volatility organic compounds (IVOCs) have great potential to form secondary organic aerosols (SOA) in the atmosphere. Thus, a high-resolution IVOC emission inventory is essential for the accurate simulation of SOA formation. This study developed the first nationwide on-road vehicular IVOC emission inventory in China based on localized measurement of the IVOC emission factors and volatility distributions for various vehicle types. The total vehicular IVOC emissions in China in 2019 were estimated to be 241.2 Gg. Heavy-duty trucks, light-duty trucks, and light-duty passenger vehicles contributed the most, accounting for 47.6%, 24.6%, and 16.9% of total vehicular IVOC emissions, respectively. Although much higher in number, gasoline vehicles contributed 15.0%, which was far less than the contribution of diesel vehicles. The two peaks in volatility bins B(12)-B(13) and B(16)-B(17) accounted for 42.2% and 23.7% of the total IVOC emissions, respectively. By gridding the emission inventory into a relatively high resolution of 0.1 degrees x 0.1 degrees , high-emission areas and hotspots were clearly identified. In general, eastern China had substantially higher vehicular IVOC emissions than western China. High-emission areas with emission intensity >10 Mg.grid(-1) covered most of the North China Plain, Yangtze River Delta, and Pearl River Delta. The emission intensity over the downtown areas of Beijing and Shanghai exceeded 50 Mg.grid(-1). In contrast, IVOC emissions over western China were relatively lower, with a network structure gathering around the traffic arteries serving inter-provincial transportation. This study underscored the importance of having a localized emission factor to better reflect the IVOC emission characteristics from Chinese vehicles and to improve the assessment of their environmental impacts"
Keywords:		Aerosols *Air Pollutants China Environmental Monitoring Gasoline Motor Vehicles Vehicle Emissions *Volatile Organic Compounds Emission inventory Grid allocation Intermediate volatility organic compounds On-road vehicles;
Notes:		"MedlineWang, Anqi Yuan, Zibing Liu, Xuehui Wang, Menglei Yang, Jun Sha, Qing'e Zheng, Junyu eng England 2022/08/07 Environ Pollut. 2022 Oct 1; 310:119887. doi: 10.1016/j.envpol.2022.119887. Epub 2022 Aug 3"