气候变化领域集成服务门户(CCPortal): Synergetic effects of NH3 and NOx on the production and optical absorption of secondary organic aerosol formation from toluene photooxidation

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DOI	10.5194/acp-21-17759-2021
	Synergetic effects of NH3 and NOx on the production and optical absorption of secondary organic aerosol formation from toluene photooxidation
	Liu S.; Huang D.; Wang Y.; Zhang S.; Liu X.; Wu C.; Du W.; Wang G.
发表日期	2021
ISSN	1680-7316
起始页码	17759
结束页码	17773
卷号	21 期号:23
英文摘要	NH3 is the most important alkaline gas in the atmosphere and one of the key species affecting the behaviors of atmospheric aerosols. However, the impact of NH3 on secondary organic aerosol (SOA) formation remains poorly understood, especially the dynamic evolution of chemical compositions in the SOA formation process. In this study, a series of chamber experiments were performed to probe the individual and common effects of NH3 and NOx on toluene SOA formation through OH photooxidation. The chemical compositions of toluene SOA were characterized using the Aerodyne high-resolution time-of-flight aerosol mass spectrometer (AMS). The SOA yield increased from 28.1ĝ€¯% in the absence of NH3 to 34.7ĝ€¯% in the presence of NH3 but decreased to 19.5ĝ€¯% in the presence of NOx. However, the highest SOA yield of 42.7ĝ€¯% and the lowest carbon oxidation state (OSC) occurred in the presence of both NH3 and NOx, indicating that the higher-volatility products that formed in the presence of NOx could partition into the particle phase when NH3 was added. This resulted in a synergetic effect on SOA formation when NH3 and NOx co-existed. The heterogeneous reaction was the main pathway by which NH3 participated in SOA formation in the photooxidation process. The synergetic effect of NH3 and NOx was also observed in SOA optical absorption. A peak at 280ĝ€¯nm, which is characteristic of organonitrogen imidazole compounds, was observed in the presence of NH3, and its intensity increased when NOx was added into the chamber. This work improves our understanding of how the synergistic interactions between NH3 and NOx influence SOA formation and offers new insights into mitigating haze pollution. © Copyright:
语种	英语
scopus关键词	absorption; aerosol composition; aerosol formation; ammonia; mass spectrometry; nitrogen oxides; photooxidation; toluene
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/246388
作者单位	Key Lab of Geographic Information Science of the Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai, 210062, China; State Environ. Protect. Key Lab. of Formation and Prevention of the Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai, 200233, China; Institute of Eco-Chongming, Cuiniao Road, Shanghai, 202150, China
推荐引用方式 GB/T 7714	Liu S.,Huang D.,Wang Y.,et al. Synergetic effects of NH3 and NOx on the production and optical absorption of secondary organic aerosol formation from toluene photooxidation[J],2021,21(23).
APA	Liu S..,Huang D..,Wang Y..,Zhang S..,Liu X..,...&Wang G..(2021).Synergetic effects of NH3 and NOx on the production and optical absorption of secondary organic aerosol formation from toluene photooxidation.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(23).
MLA	Liu S.,et al."Synergetic effects of NH3 and NOx on the production and optical absorption of secondary organic aerosol formation from toluene photooxidation".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.23(2021).