Sources and composition of elemental carbon during haze events in North China by a high time-resolved study
文献类型：期刊论文
| 作者 | Jiang, Hongxing2; Cai, Junjie2; Feng, Xinxin2; Chen, Yingjun2,3; Li, Jun1; Zhang, Gan1 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2024-01-10 |
| 卷号 | 907页码:11 |
| 关键词 | Elemental carbon Char/soot ratio Haze High time-resolution Source apportionment Residential solid fuel combustion |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2023.168055 |
| 英文摘要 | Despite the implementation of stringent emission reduction measures in the past year, severe winter haze events still occurred frequently in North China, with only marginal decreases observed in elemental carbon (EC) concentrations. EC not only constitutes a fraction of particle mass but also interacts with boundary layer and influences haze formation. Given the complex composition of EC, characterizing its sources and composition during haze processes is challenging yet crucial for understanding haze formation and evolution. Here, hourlyresolution PM2.5 samples were collected during three different haze event (P1-P3) in the North China Plain to investigate dynamic changes in EC source across different haze processes. The average EC concentrations and char/soot ratios were 9.94 +/- 4.80 mu gC center dot m(-3), 14.5 +/- 6.93 mu gC center dot m(-3), 15.9 +/- 5.54 mu gC center dot m(-3), and 2.42 +/- 0.98, 2.70 +/- 0.88, 2.61 +/- 0.95 for P1, P2 and P3, respectively. Backward trajectory analysis showed distinct variations in EC concentration and composition under the influence of different air masses during the three haze events, with local air masses influenced days exhibiting higher EC concentrations and char/soot ratios. The char/soot ratio based diagnostic method suggested that EC was predominantly influenced by coal combustion and vehicle emissions. Further positive matrix factorization analysis suggested that biomass burning and residential coal combustion were the main contributors of EC (58 %) and played a dominant role in driving variations in EC concentrations during haze episodes. Potential source contribution function analysis results highlight that local biomass burning and residential coal combustion could be major reason for the EC elevation in different haze events. Our results provide valuable insights into the sources and composition of EC during haze events, facilitating the implementation of effective measures for mitigating both EC and PM pollution. |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001108556400001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/79084]  |
| 专题 | 有机地球化学国家重点实验室 |
| 通讯作者 | Chen, Yingjun |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Organ Geochem & Guangdong Prov, Key Lab Environm Protect & Resources Utilizat, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 2.Fudan Univ, Dept Environm Sci & Engn, Shanghai Key Lab Atmospher Particle Pollut & Preve, Shanghai 200433, Peoples R China 3.Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang, Hongxing,Cai, Junjie,Feng, Xinxin,et al. Sources and composition of elemental carbon during haze events in North China by a high time-resolved study[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2024,907:11. |
| APA | Jiang, Hongxing,Cai, Junjie,Feng, Xinxin,Chen, Yingjun,Li, Jun,&Zhang, Gan.(2024).Sources and composition of elemental carbon during haze events in North China by a high time-resolved study.SCIENCE OF THE TOTAL ENVIRONMENT,907,11. |
| MLA | Jiang, Hongxing,et al."Sources and composition of elemental carbon during haze events in North China by a high time-resolved study".SCIENCE OF THE TOTAL ENVIRONMENT 907(2024):11. |
入库方式： OAI收割
来源：广州地球化学研究所
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