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DOI	10.5194/acp-21-7099-2021
	Increased primary and secondary H2SO4showing the opposing roles in secondary organic aerosol formation from ethyl methacrylate ozonolysis
	Zhang P.; Chen T.; Liu J.; Xu G.; Ma Q.; Chu B.; Sun W.; He H.
发表日期	2021
ISSN	1680-7316
起始页码	7099
结束页码	7112
卷号	21 期号:9
英文摘要	Stressed plants and polymer production can emit many unsaturated volatile organic esters (UVOEs). However, secondary organic aerosol (SOA) formation of UVOEs remains unclear, especially under complex ambient conditions. In this study, we mainly investigated ethyl methacrylate (EM) ozonolysis. Results showed that a substantial increase in secondary H2SO4 particles promoted SOA formation with increasing SO2. An important reason was that the homogeneous nucleation of more H2SO4 at high SO2 level provided greater surface area and volume for SOA condensation. However, increased primary H2SO4 with seed acidity enhanced EM uptake but reduced SOA formation. This was ascribed to the fact that the ozonolysis of more adsorbed EM was hampered with the formation of surface H2SO4 at higher particle acidity. Moreover, the increase in secondary H2SO4 particle via homogeneous nucleation favored to the oligomerization of oxidation products, whereas the increasing of primary H2SO4 with acidity in the presence of seed tended to promote the functionalization conversion products. This study indicated that the role of increased H2SO4 to EMderived SOA may not be the same under different ambient conditions, which helps to advance our understanding of the complicated roles of H2SO4 in the formation of EM-derived SOA. © 2021 Author(s).
语种	英语
scopus关键词	acidity; aerosol formation; condensation; hydrogen sulfide; nucleation; oxidation; sulfur dioxide; surface area
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/246906
作者单位	State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; University of Chinese Academy of Sciences, Beijing, 100049, China; CMA Meteorological Observation Centre, Beijing, 100081, China
推荐引用方式 GB/T 7714	Zhang P.,Chen T.,Liu J.,et al. Increased primary and secondary H2SO4showing the opposing roles in secondary organic aerosol formation from ethyl methacrylate ozonolysis[J],2021,21(9).
APA	Zhang P..,Chen T..,Liu J..,Xu G..,Ma Q..,...&He H..(2021).Increased primary and secondary H2SO4showing the opposing roles in secondary organic aerosol formation from ethyl methacrylate ozonolysis.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(9).
MLA	Zhang P.,et al."Increased primary and secondary H2SO4showing the opposing roles in secondary organic aerosol formation from ethyl methacrylate ozonolysis".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.9(2021).