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Sci Total Environ

Title:		Two-year online measurements of volatile organic compounds (VOCs) at four sites in a Chinese city: Significant impact of petrochemical industry
Author(s):		Mu J; Zhang Y; Xia Z; Fan G; Zhao M; Sun X; Liu Y; Chen T; Shen H; Zhang Z; Zhang H; Pan G; Wang W; Xue L;
Address:		"Environment Research Institute, Shandong University, Qingdao, Shandong 266237, China. Environment Research Institute, Shandong University, Qingdao, Shandong 266237, China. Electronic address: yingnan@mail.sdu.edu.cn. Ji'nan Ecological Environment Monitoring Center of Shandong Province, Ji'nan, Shandong 250000, China. Key Laboratory of Marine Environment and Ecology, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ministry of Education, Ocean University of China, Qingdao, Shandong 266100, China. Environment Research Institute, Shandong University, Qingdao, Shandong 266237, China; Ji'nan Ecological Environment Monitoring Center of Shandong Province, Ji'nan, Shandong 250000, China. Electronic address: xuelikun@sdu.edu.cn"
Journal Title:		Sci Total Environ
Year:		2023
Volume:		20221103
Issue:		Pt 3
Page Number:		159951 -
DOI:		10.1016/j.scitotenv.2022.159951
ISSN/ISBN:		1879-1026 (Electronic) 0048-9697 (Linking)
Abstract:		"Volatile organic compounds (VOCs) management has been recently given a high priority in China to mitigate ozone (O(3)) air pollution. However, there is a relatively poor understanding of VOCs due to their complexity and fewer observations. To better understand the pollution characteristics of VOCs and their impact on O(3) pollution, two-year continuous measurements were conducted at four representative sites in Ji'nan, eastern China. These four sites cover urban, background, and industrial areas (within a petroleum refinery). Ambient VOCs showed higher concentrations at industrial site than at urban and background sites, owing to intensive emissions from petrochemical industry. The VOCs compositions present spatial heterogeneity with alkenes dominated in total reactivity at urban and background sites, while alkenes and aromatics together dominated at industrial site. The VOCs emission profile from petrochemical industry was calculated based on observational data, which revealed a huge impact on light alkanes (C(2)-C(5)), light alkenes (ethene), and aromatics (toluene and m/p-xylene). The positive matrix factorization (PMF) model analysis further refined the impact of different petrochemical industrial processes. Alkanes and alkenes dominated the emissions during refining process, while aromatics dominated during solvent usage process. Analysis by an observation-based model indicated stronger in-situ O(3) production and higher sensitivity to nitrogen oxides at industrial site compared to urban and background sites. The reduction of VOCs emissions from petrochemical industry would significantly reduce the O(3) concentrations. The analyses underline the significant impact of petrochemical industry on VOCs and O(3) pollution, and provide important reference for the formulation of refined and effective control strategies"
Keywords:		China *Volatile Organic Compounds *Cities *Environmental Monitoring Observation-based model Ozone Petrochemical industry Spatio-temporal distribution Volatile organic compounds;
Notes:		"MedlineMu, Jiangshan Zhang, Yingnan Xia, Zhiyong Fan, Guolan Zhao, Min Sun, Xiaoyan Liu, Yuhong Chen, Tianshu Shen, Hengqing Zhang, Zhanchao Zhang, Huaicheng Pan, Guang Wang, Wenxing Xue, Likun eng Netherlands 2022/11/07 Sci Total Environ. 2023 Feb 1; 858(Pt 3):159951. doi: 10.1016/j.scitotenv.2022.159951. Epub 2022 Nov 3"