High Molecular Diversity of Organic Nitrogen in Urban Snow in North China
文献类型：期刊论文
| 作者 | Su, Sihui; Xie, Qiaorong; Lang, Yunchao; Cao, Dong ; Xu, Yisheng; Chen, Jing; Chen, Shuang; Hu, Wei; Qi, Yulin; Pan, Xiaole
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| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2021-04-20 |
| 卷号 | 55期号:8页码:4344-4356 |
| ISSN号 | 0013-936X |
| 英文摘要 | Snow serves as a vital scavenging mechanism to gas-phase and particle-phase organic nitrogen substances in the atmosphere, providing a significant link between land-atmosphere flux of nitrogen in the surface-earth system. Here, we used optical instruments (UV-vis and excitation-emission matrix fluorescence) and a Fourier transform ion cyclotron resonance mass spectrometer (FT-ICR MS) to elucidate the molecular composition and potential precursors of snow samples collected simultaneously at four megacities in North China. The elemental O/N ratio (>= 3), together with the preference in the negative ionization mode, indicates that the one and two nitrogen atom-containing organics (CHON1 and CHON2) in snow were largely in the oxidized form (as organic nitrates, -ONO2). This study assumed that scavenging of particle-phase and gas-phase organic nitrates might be significant sources of CHON in precipitation. A gas-phase oxidation process and a particle-phase hydrolysis process, at a molecular level, were used to trace the potential precursors of CHON. Results show that more than half of the snow CHON molecules may be related to the oxidized and hydrolyzed processes of atmospheric organics. Potential formation processes of atmospheric organics on a molecular level provide a new concept to better understand the sources and scavenging mechanisms of organic nitrogen species in the atmosphere. |
| WOS研究方向 | Engineering, Environmental ; Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45742]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 作者单位 | 1.Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China 2.Tianjin Univ, Sch Earth Syst Sci, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China 3.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China 4.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China 5.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Su, Sihui,Xie, Qiaorong,Lang, Yunchao,et al. High Molecular Diversity of Organic Nitrogen in Urban Snow in North China[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2021,55(8):4344-4356. |
| APA | Su, Sihui.,Xie, Qiaorong.,Lang, Yunchao.,Cao, Dong.,Xu, Yisheng.,...&Fu, Pingqing.(2021).High Molecular Diversity of Organic Nitrogen in Urban Snow in North China.ENVIRONMENTAL SCIENCE & TECHNOLOGY,55(8),4344-4356. |
| MLA | Su, Sihui,et al."High Molecular Diversity of Organic Nitrogen in Urban Snow in North China".ENVIRONMENTAL SCIENCE & TECHNOLOGY 55.8(2021):4344-4356. |
入库方式： OAI收割
来源：生态环境研究中心
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