Characterization of Imidazole Compounds in Aqueous Secondary Organic Aerosol Generated from Evaporation of Droplets Containing Pyruvaldehyde and Inorganic Ammonium

doi:10.3390/atmos13060970

HFCAS OpenIR

	Characterization of Imidazole Compounds in Aqueous Secondary Organic Aerosol Generated from Evaporation of Droplets Containing Pyruvaldehyde and Inorganic Ammonium
	Lin, Xin 1; Huang, Mingqiang 1; Lu, Tingting 1; Zhao, Weixiong2 ; Hu, Changjin 2; Gu, Xuejun2 ; Zhang, Weijun2
	2022-06-01
发表期刊	ATMOSPHERE
通讯作者	Huang, Mingqiang(huangmingqiang@mnnu.edu.cn) ; Zhang, Weijun(wjzhangaiofm@gmail.com)
摘要	Imidazole compounds are important constituents of atmospheric brown carbon. The imidazole components of aqueous secondary organic aerosol (aqSOA) that are generated from the evaporation of droplets containing pyruvaldehyde and inorganic ammonium are on-line characterized by an aerosol laser time-of-flight mass spectrometer (ALTOFMS) and off-line detected by optical spectrometry in this study. The results demonstrated that the laser desorption/ionization mass spectra of aqSOA particles that were detected by ALTOFMS contained the characteristic mass peaks of imidazoles at m/z = 28 (CH2N+), m/z = 41 (C2H3N+) and m/z = 67 (C3H4N2+). Meanwhile, the extraction solution of the aqSOA particles that were measured by off-line techniques showed that the characteristic absorption peaks at 217 nm and 282 nm appeared in the UV-Vis spectrum, and the stretching vibration peaks of C-N bond and C=N bond emerged in the infrared spectrum. Based on these spectral information, 4-methyl-imidazole and 4-methyl-imidazole-2-carboxaldehyde are identified as the main products of the reaction between pyruvaldehyde and ammonium ions. The water evaporation accelerates the formation of imidazoles inside the droplets, possibly owing to the highly concentrated environment. Anions, such as F-, CO32-, NO3-, SO42- and Cl- in the aqueous phase promote the reaction of pyruvaldehyde and ammonium ions to produce imidazole products, resulting in the averaged mass absorption coefficient () in the range of 200-600 nm of aqSOA increases, and the order of promotion is: F- > CO32- > SO42- approximate to NO3- approximate to Cl-. These results will help to analyze the constituents and optics of imidazoles and provide a useful basis for evaluating the formation process and radiative forcing of aqSOA particles.
关键词	pyruvaldehyde inorganic ammonium aqueous secondary organic aerosol imidazole compounds brown carbon
DOI	10.3390/atmos13060970
关键词[WOS]	BROWN CARBON CONSTITUENTS ; POTENTIAL PHOTOSENSITIZERS ; MASS-SPECTROMETER ; GLYOXAL ; IMIDAZOLE-2-CARBOXALDEHYDE ; PARTICLES ; PRODUCTS ; PHOTOCHEMISTRY ; METHYLGLYOXAL ; WATER
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41575118] ; Key Project of the Natural Science Foundation of Fujian Province, China[2020J02044] ; Natural Science Foundation of Fujian Province, China[2021J01987]
项目资助者	National Natural Science Foundation of China ; Key Project of the Natural Science Foundation of Fujian Province, China ; Natural Science Foundation of Fujian Province, China
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000816088900001
出版者	MDPI
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/129557
专题	中国科学院合肥物质科学研究院
通讯作者	Huang, Mingqiang; Zhang, Weijun
作者单位	1.Minnan Normal Univ, Coll Chem & Chem Engn & Environm, Fujian Prov Key Lab Modern Analyt Sci & Separat T, Zhangzhou 363000, Peoples R China 2.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Lab Atmospher Physicochem, Hefei 230031, Peoples R China
通讯作者单位	中科院安徽光学精密机械研究所
推荐引用方式 GB/T 7714	Lin, Xin,Huang, Mingqiang,Lu, Tingting,et al. Characterization of Imidazole Compounds in Aqueous Secondary Organic Aerosol Generated from Evaporation of Droplets Containing Pyruvaldehyde and Inorganic Ammonium[J]. ATMOSPHERE,2022,13.
APA	Lin, Xin.,Huang, Mingqiang.,Lu, Tingting.,Zhao, Weixiong.,Hu, Changjin.,...&Zhang, Weijun.(2022).Characterization of Imidazole Compounds in Aqueous Secondary Organic Aerosol Generated from Evaporation of Droplets Containing Pyruvaldehyde and Inorganic Ammonium.ATMOSPHERE,13.
MLA	Lin, Xin,et al."Characterization of Imidazole Compounds in Aqueous Secondary Organic Aerosol Generated from Evaporation of Droplets Containing Pyruvaldehyde and Inorganic Ammonium".ATMOSPHERE 13(2022).