Impact of fossil and non-fossil fuel sources on the molecular compositions of water-soluble humic-like substances in PM2.5 at a suburban site of Yangtze River Delta, China
文献类型：期刊论文
| 作者 | Bao, Mengying3,4,5; Zhang, Yan-Lin4,5; Cao, Fang4,5; Hong, Yihang4,5; Lin, Yu-Chi4,5; Yu, Mingyuan4,5; Jiang, Hongxing1,2; Cheng, Zhineng1,2; Xu, Rongshuang4,5; Yang, Xiaoying4,5 |
| 刊名 | ATMOSPHERIC CHEMISTRY AND PHYSICS
 |
| 出版日期 | 2023-07-25 |
| 卷号 | 23期号:14页码:8305-8324 |
| ISSN号 | 1680-7316 |
| DOI | 10.5194/acp-23-8305-2023 |
| 英文摘要 | Atmospheric humic-like substances (HULIS) affect the global radiation balance due to their strong light absorption at the ultraviolet wavelength. The potential sources and molecular compositions of water-soluble HULIS at a suburban site in the Yangtze River Delta from 2017 to 2018 were discussed, based on the results of the radiocarbon (C-14) analysis and combining the Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS) technique in this study. The C-14 results showed that the averaged non-fossil-fuel source contributions to HULIS were 39 +/- 8% and 36 +/- 6% in summer and winter, respectively, indicating significant contributions from fossil fuel sources to HULIS. The Van Krevelen diagrams obtained from the FT-ICR-MS results showed that the proportions of tannin-like and carbohydrate-like groups were higher in summer, suggesting significant contribution of HULIS from biogenic secondary organic aerosols (SOAs). The higher proportions of condensed aromatic structures in winter suggested increasing anthropogenic emissions. Molecular composition analysis on the CHO, CHON, CHOS, and CHONS subgroups showed relatively higher intensities of high O-containing macromolecular oligomers in the CHO compounds in summer, further indicating stronger biogenic SOA formation in summer. High-intensity phenolic substances and flavonoids, which were related to biomass burning and polycyclic aromatic hydrocarbon (PAH) derivatives indicating fossil fuel combustion emissions, were found in winter CHO compounds. Besides, two high-intensity CHO compounds containing condensed aromatic ring structures (C9H6O7 and C10H5O8) identified in the summer and winter samples were similar to those from offroad engine samples, indicating that traffic emissions were one of the important fossil fuel sources of HULIS at the study site. The CHON compounds were mainly composed of nitro compounds or organonitrates with significantly higher intensities in winter, which were associated with biomass burning emissions, in addition to the enhanced formation of organonitrates due to high NOx in winter. However, the high-intensity CHON molecular formulas in summer were referring to N-heterocyclic aromatic compounds, which were produced from the atmospheric secondary processes involving reduced N species (e.g., ammonium). The S-containing compounds were mainly composed of organosulfates (OSs) derived from biogenic precursors, namely long-chain alkane and aromatic hydrocarbon, which illustrate the mixed sources of HULIS. Generally, different policies need to be considered for each season due to the different seasonal sources (i.e., biogenic emissions in summer and biomass burning in winter for non-fossil-fuel sources, traffic emissions and anthropogenic SOA formation in both seasons, and additional coal combustion in winter). Measures to control emissions from motor vehicles and industrial processes need to be considered in summer. Additional control measures on coal power plants and biomass burning should be applied in winter. These findings add to our understanding of the interaction between the sources and the molecular compositions of atmospheric HULIS. |
| WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:001036145100001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/74637]  |
| 专题 | 有机地球化学国家重点实验室 |
| 通讯作者 | Zhang, Yan-Lin |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangdong Prov Key Lab Environm Protect & Resource, Guangzhou 510640, Peoples R China 3.Huzhou Meteorol Adm, Huzhou 313300, Peoples R China 4.Nanjing Univ Informat Sci & Technol, Atmospher Environm Ctr, Joint Lab Int Cooperat Climate & Environm Change, Minist Educ ILCEC, Nanjing 210044, Peoples R China 5.Nanjing Univ Informat Sci & Technol, Sch Appl Meteorol, Nanjing 210044, Peoples R China |
| 推荐引用方式 GB/T 7714 | Bao, Mengying,Zhang, Yan-Lin,Cao, Fang,et al. Impact of fossil and non-fossil fuel sources on the molecular compositions of water-soluble humic-like substances in PM2.5 at a suburban site of Yangtze River Delta, China[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2023,23(14):8305-8324. |
| APA | Bao, Mengying.,Zhang, Yan-Lin.,Cao, Fang.,Hong, Yihang.,Lin, Yu-Chi.,...&Yang, Xiaoying.(2023).Impact of fossil and non-fossil fuel sources on the molecular compositions of water-soluble humic-like substances in PM2.5 at a suburban site of Yangtze River Delta, China.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(14),8305-8324. |
| MLA | Bao, Mengying,et al."Impact of fossil and non-fossil fuel sources on the molecular compositions of water-soluble humic-like substances in PM2.5 at a suburban site of Yangtze River Delta, China".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.14(2023):8305-8324. |
入库方式： OAI收割
来源：广州地球化学研究所
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