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

文献类型：期刊论文

作者Lin, Xin1; Huang, Mingqiang1; Lu, Tingting1; Zhao, Weixiong2; Hu, Changjin2; Gu, Xuejun2; Zhang, Weijun2
刊名ATMOSPHERE
出版日期2022-06-01
卷号13
关键词pyruvaldehyde inorganic ammonium aqueous secondary organic aerosol imidazole compounds brown carbon
DOI10.3390/atmos13060970
通讯作者Huang, Mingqiang(huangmingqiang@mnnu.edu.cn) ; Zhang, Weijun(wjzhangaiofm@gmail.com)
英文摘要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.
WOS关键词BROWN CARBON CONSTITUENTS ; POTENTIAL PHOTOSENSITIZERS ; MASS-SPECTROMETER ; GLYOXAL ; IMIDAZOLE-2-CARBOXALDEHYDE ; PARTICLES ; PRODUCTS ; PHOTOCHEMISTRY ; METHYLGLYOXAL ; WATER
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]
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
语种英语
出版者MDPI
WOS记录号WOS:000816088900001
资助机构National Natural Science Foundation of China ; Key Project of the Natural Science Foundation of Fujian Province, China ; Natural Science Foundation of Fujian Province, China
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/129556]  
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
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).

入库方式： OAI收割

来源：合肥物质科学研究院

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