气候变化领域集成服务门户(CCPortal): Measurement report: Online measurement of gas-phase nitrated phenols utilizing a CI-LToF-MS: Primary sources and secondary formation

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DOI	10.5194/acp-21-7917-2021
	Measurement report: Online measurement of gas-phase nitrated phenols utilizing a CI-LToF-MS: Primary sources and secondary formation
	Song K.; Guo S.; Wang H.; Yu Y.; Wang H.; Tang R.; Xia S.; Gong Y.; Wan Z.; Lv D.; Tan R.; Zhu W.; Shen R.; Li X.; Yu X.; Chen S.; Zeng L.; Huang X.
发表日期	2021
ISSN	1680-7316
起始页码	7917
结束页码	7932
卷号	21 期号:10
英文摘要	To investigate the composition, variation, and sources of nitrated phenols (NPs) in the winter of Beijing, gas-phase NPs were measured by a chemical ionization long time-of-flight mass spectrometer (CI-LToF-MS). A box model was applied to simulate the secondary formation process of NPs. In addition, the primary sources of NPs were resolved by a non-negative matrix factorization (NMF) model. Our results showed that secondary formation contributed 38 %, 9 %, 5 %, 17 %, and almost 100% of the nitrophenol (NP), methyl-nitrophenol (MNP), dinitrophenol (DNP), methyl-dinitrophenol (MDNP or DNOC), and dimethyl-nitrophenol (DMNP) concentrations. The phenol-OH reaction was the predominant loss pathway (46.7 %) during the heavy pollution episode, which produced the phenoxy radical (C6H5O). The phenoxy radical consequently reacted with NO2 and produced nitrophenol. By estimating the primarily emitted phenol from the ratio of phenol=CO from freshly emitted vehicle exhaust, this study proposed that oxidation of primary phenol contributes much more nitrophenol (37 %) than that from benzene oxidation (< 1 %) in the winter of Beijing. The latter pathway was widely used in models and might lead to great uncertainties. The source apportionment results by NMF indicated the importance of combustion sources (> 50 %) to the gas-phase NPs. The industry source contributed 30% and 9% to DNP and MDNP, respectively, which was non-negligible. The concentration weighted trajectory (CWT) analysis demonstrated that regional transport from provinces that surround the Yellow and Bohai seas contributed more primary NPs to Beijing. Both primary sources and secondary formation at either local or regional scale should be considered when making control policies of NPs. © 2021 Kai Song et al.
语种	英语
scopus关键词	atmospheric chemistry; concentration (composition); free radical; Internet; ionization; oxidation; phenol; trace element; trajectory
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246865
作者单位	State Key Joint Laboratory of Environmental Simulation and Pollution Control, International Joint Laboratory for Regional Pollution Control, Ministry of Education (IJRC), College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China; Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science and Technology, Nanjing, 210044, China; School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai, 519082, China; Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
推荐引用方式 GB/T 7714	Song K.,Guo S.,Wang H.,et al. Measurement report: Online measurement of gas-phase nitrated phenols utilizing a CI-LToF-MS: Primary sources and secondary formation[J],2021,21(10).
APA	Song K..,Guo S..,Wang H..,Yu Y..,Wang H..,...&Huang X..(2021).Measurement report: Online measurement of gas-phase nitrated phenols utilizing a CI-LToF-MS: Primary sources and secondary formation.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(10).
MLA	Song K.,et al."Measurement report: Online measurement of gas-phase nitrated phenols utilizing a CI-LToF-MS: Primary sources and secondary formation".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.10(2021).