Knowledge Management System Of Guangzhou Institute of Geochemistry，CAS
Sun, Wei1,2,3; Zhang, Guohua1,2,3 ; Guo, Ziyong1,2,3; Fu, Yuzhen1,2,3; Peng, Xiaocong1,2,3,4; Yang, Yuxiang1,2,3; Hu, Xiaodong1,2,3; Lin, Juying1,2,3,4; Jiang, Feng5; Jiang, Bin1,2,3; Liao, Yuhong1,2,3; Chen, Duohong6; Chen, Jianmin7; Ou, Jie8; Wang, Xinming1,2,3; Peng, Ping'an1,2,3; Bi, Xinhui1,2,3
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| Formation of In-Cloud Aqueous-Phase Secondary Organic Matter and Related Characteristic Molecules | |
| Source Publication | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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| ISSN | 2169-897X |
| 2024-04-16 | |
| Volume | 129Issue:7Pages:13 |
| DOI | 10.1029/2023JD040355 |
| Language | 英语 |
| WOS Research Area | Meteorology & Atmospheric Sciences |
| Abstract | 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. |
| Keyword | cloud water aqueous-phase reaction molecular composition secondary organic aerosols FT-ICR MS |
| WOS ID | WOS:001192336400001 |
| Indexed By | SCI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.gig.ac.cn/handle/344008/77044 |
| Collection | 有机地球化学国家重点实验室 |
| Corresponding Author | Bi, Xinhui |
| Affiliation | 1.Chinese Acad Sci, State Key Lab Organ Geochem, Guangzhou Inst Geochem, Guangzhou, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Key Lab Environm Protect & Resources Uti, Guangzhou, Peoples R China 3.Guangdong Hong Kong Macao Joint Lab Environm Pollu, Guangzhou, Peoples R China 4.Univ Chinese Acad Sci, Beijing, Peoples R China 5.Karlsruhe Inst Technol, Inst Meteorol & Climate Res, Eggenstein Leopoldshafen, Germany 6.Guangdong Environm Monitoring Ctr, State Environm Protect Key Lab Reg Air Qual Monito, Guangzhou, Peoples R China 7.Fudan Univ, Dept Environm Sci & Engn, Shanghai Key Lab Atmospher Particle Pollut & Preve, Shanghai, Peoples R China 8.Shaoguan Environm Monitoring Ctr, Shaoguan, Peoples R China |
| Recommended Citation 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. |
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