Formation of In-Cloud Aqueous-Phase Secondary Organic Matter and Related Characteristic Molecules
文献类型：期刊论文
| 作者 | Sun, Wei6,7,8; Zhang, Guohua6,7,8 ; Guo, Ziyong6,7,8; Fu, Yuzhen6,7,8; Peng, Xiaocong5,6,7,8; Yang, Yuxiang6,7,8; Hu, Xiaodong6,7,8; Lin, Juying5,6,7,8; Jiang, Feng1; Jiang, Bin6,7,8
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| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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| 出版日期 | 2024-04-16 |
| 卷号 | 129期号:7页码:13 |
| 关键词 | cloud water aqueous-phase reaction molecular composition secondary organic aerosols FT-ICR MS |
| ISSN号 | 2169-897X |
| DOI | 10.1029/2023JD040355 |
| 英文摘要 | Atmospheric particles are largely represented by secondary organic aerosols (SOAs) produced by either aqueous- or gas-phase reactions. Recently, the contribution of the former to SOA formation has been shown to substantially increase and even reach that of the latter, which necessitates in-depth mechanistic investigations. For a deeper understanding of aqueous-phase SOA generation, we herein studied the production of these aerosols in the dark from glycolaldehyde (GAld) and ammonium sulfate (AS)/amines (methylamine (MAm) and glycine (Gly)). UV-vis spectroscopy showed that reaction mixtures featured two main absorption bands (at 209-230 and 280-330 nm) that were attributed to the pi-pi* transitions of Schiff bases and the n-pi* transitions of oligomers produced in the above reactions, respectively. Further studies revealed that irrespective of reactant concentration and pH, all the investigated reactions were well fitted by first-order kinetics and were accelerated by increasing AS/MAm concentrations and solution pH under acidic conditions. The reaction rate constants (determined from changes of absorption at 300 nm) followed the order of Gly (k(I) = 2.39 x 10(-6) s(-1)) > MAm (k(I) = 1.19 x 10(-6) s(-1)) > AS (k(I) = 8.33 x 10(-7) s(-1)) at identical low AS/amine concentrations and were in the order of MAm (k(I) = 2.5 x 10(-6) s(-1)) > AS (k(I) = 1.39 x 10(-6) s(-1)) at high AS/MAm concentrations. The main reaction pathways corresponded to the aldol self-condensation of GAld and the nucleophilic attack of AS/amines on GAld followed by dehydration, which afforded imines as the major products. The stronger light absorption of (GAld + Gly) mixtures than that of (glyoxal/methylglyoxal + Gly) mixtures was ascribed to the increased amount of imine- and carbonyl group-containing products produced in the former case. |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:001192336400001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/77043]  |
| 专题 | 有机地球化学国家重点实验室 |
| 通讯作者 | Bi, Xinhui |
| 作者单位 | 1.Karlsruhe Inst Technol, Inst Meteorol & Climate Res, Eggenstein Leopoldshafen, Germany 2.Guangdong Environm Monitoring Ctr, State Environm Protect Key Lab Reg Air Qual Monito, Guangzhou, Peoples R China 3.Fudan Univ, Dept Environm Sci & Engn, Shanghai Key Lab Atmospher Particle Pollut & Preve, Shanghai, Peoples R China 4.Shaoguan Environm Monitoring Ctr, Shaoguan, Peoples R China 5.Univ Chinese Acad Sci, Beijing, Peoples R China 6.Guangdong Hong Kong Macao Joint Lab Environm Pollu, Guangzhou, Peoples R China 7.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Key Lab Environm Protect & Resources Uti, Guangzhou, Peoples R China 8.Chinese Acad Sci, State Key Lab Organ Geochem, Guangzhou Inst Geochem, Guangzhou, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Wei,Zhang, Guohua,Guo, Ziyong,et al. Formation of In-Cloud Aqueous-Phase Secondary Organic Matter and Related Characteristic Molecules[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2024,129(7):13. |
| APA | Sun, Wei.,Zhang, Guohua.,Guo, Ziyong.,Fu, Yuzhen.,Peng, Xiaocong.,...&Bi, Xinhui.(2024).Formation of In-Cloud Aqueous-Phase Secondary Organic Matter and Related Characteristic Molecules.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,129(7),13. |
| MLA | Sun, Wei,et al."Formation of In-Cloud Aqueous-Phase Secondary Organic Matter and Related Characteristic Molecules".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 129.7(2024):13. |
入库方式： OAI收割
来源：广州地球化学研究所
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