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Sci Total Environ

Title:		Significant impact of coal combustion on VOCs emissions in winter in a North China rural site
Author(s):		Zhang F; Shang X; Chen H; Xie G; Fu Y; Wu D; Sun W; Liu P; Zhang C; Mu Y; Zeng L; Wan M; Wang Y; Xiao H; Wang G; Chen J;
Address:		"Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science & Engineering, Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China; Department of Environment, Yangtze Delta Region Institute of Tsinghua University, Jiaxing, Zhejiang Province 314000, China. Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science & Engineering, Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China. Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science & Engineering, Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China; Institute of Eco-Chongming, Shanghai 200062, China. Electronic address: hui_chen@fudan.edu.cn. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. School of Environmental Science & Engineering, Peking University, Beijing 100071, China. Department of Environment, Yangtze Delta Region Institute of Tsinghua University, Jiaxing, Zhejiang Province 314000, China. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100191, China. Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China. Institute of Eco-Chongming, Shanghai 200062, China. Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science & Engineering, Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China; Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100191, China; Institute of Eco-Chongming, Shanghai 200062, China. Electronic address: jmchen@fudan.edu.cn"
Journal Title:		Sci Total Environ
Year:		2020
Volume:		20200302
Issue:
Page Number:		137617 -
DOI:		10.1016/j.scitotenv.2020.137617
ISSN/ISBN:		1879-1026 (Electronic) 0048-9697 (Linking)
Abstract:		"The measurement of volatile organic compounds (VOCs) was carried out using an online GC-FID/MS at a rural site in North China Plain from 1 Nov. 2017 to 21 Jan. 2018. Their concentrations, emission ratios and source apportionment are investigated. During the entire experiment period, the average mixing ratio of VOCs was 69.5 +/- 51.9 ppb, among which alkanes contributed the most (37% on average). Eight sources were identified in the non-negative matrix factorization (NMF) model as short-chain alkanes (13.3%), biomass burning (4.6%), solvent (10.8%), industry (3.7%), coal combustion (41.1%), background (4.5%), vehicular emission (7.7%) and secondary formation (14.2%). In addition to the formation of OVOCs through photochemical reactions, the primary sources, such as coal combustion, biomass burning, vehicular emission, solvent and industry, can also contribute to OVOCs emissions. High OVOCs emission ratios thus were observed at Wangdu site. Primary emission was estimated to contribute 50%, 45%, 73%, 77%, 40%, and 29% on average to acrolein, acetone, methylvinylketone (MVK), methylethylketone (MEK), methacrolein and n-hexanal according to NMF analysis, respectively, which was well consistent with the contribution from photochemical age method. Secondary organic aerosol formation potential (SOAFP) was evaluated by SOA yield, which was significantly higher under low-NOx condition (13.4 mug m(-3) ppm(-1)) than that under high-NOx condition (3.2 mug m(-3) ppm(-1)). Moreover, the photochemical reactivity and sources of VOCs showed differences in seven observed pollution episodes. Among, the largest OH loss rate and SOAFP were found in severe pollution plumes, which were induced primarily by coal combustion. Therefore, mitigation strategies for severe pollution formation should focus on reducing coal combustion emitted VOCs that lead to SOA formation"
Keywords:		Coal combustion Emission ratios OVOCs SOA formation potential Source apportionment Volatile organic compounds;
Notes:		"PubMed-not-MEDLINEZhang, Fei Shang, Xiaona Chen, Hui Xie, Guangzhao Fu, Yao Wu, Di Sun, Wenwen Liu, Pengfei Zhang, Chenglong Mu, Yujing Zeng, Limin Wan, Mei Wang, Yuesi Xiao, Hang Wang, Gehui Chen, Jianmin eng Netherlands 2020/04/25 Sci Total Environ. 2020 Jun 10; 720:137617. doi: 10.1016/j.scitotenv.2020.137617. Epub 2020 Mar 2"