Effect of photooxidation on size distribution, light absorption, and molecular compositions of smoke particles from rice straw combustion
文献类型：期刊论文
| 作者 | Zhao, Ranran2,3,4; Zhang, Qixing4; Xu, Xuezhe1 ; Wang, Wenjia4; Zhao, Weixiong1; Zhang, Weijun1,5; Zhang, Yongming4
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| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2022-10-15 |
| 卷号 | 311 |
| ISSN号 | 0269-7491 |
| 关键词 | Biomass burning Photooxidation Non -polar and polar organic carbon Light absorption Molecular composition |
| DOI | 10.1016/j.envpol.2022.119950 |
| 通讯作者 | Zhang, Qixing(qixing@ustc.edu.cn) |
| 英文摘要 | Organic aerosol (OA) emitted from biomass burning (BB) impacts air quality and global radiation balance. However, the comprehensive characterization of OA remains poorly understood because of the complex evolutionary behavior of OA in atmospheric processes. In this work, smoke particles were generated from rice straw combustion. The effect of OH radicals photooxidation on size distribution, light absorption, and molecular compositions of smoke particles was systematically investigated. The results showed that the median diameters of smoke particles increased by a factor of approximately 1.2 after photooxidation. In the particle compositions, although both non-polar fractions (n-hexane-soluble organic carbon, HSOC) and polar fractions (water-soluble organic carbon, WSOC) underwent photobleaching after aging, the photobleaching properties of HSOC (1.87-2.19) was always higher than that of WSOC (1.52-1.33). Besides, the light-absorbing properties of HSOC were higher than that of WSOC, showing a factor of approximately 1.75 times for mass absorption efficiency at 365 nm (MAE(365)). Consequently, the simple forcing efficiency (SFE) caused by absorption showed that HSOC has higher radiation effects than WSOC. After photooxidation, the concentration of 16 PAHs in HSOC fractions significantly decreased by 15.3%-72.5%. In WSOC fractions, the content of CHO, CHONS, and CHOS compounds decreased slightly, while the content of CHON compounds increased. Meantime, the variations in molecular properties supported the decrease in light absorption of WSOC fractions. These results reveal the aging behavior of smoke particles, then stress the importance of non-polar organic fractions in particles, providing new insights into understanding the atmospheric pollution caused by BB smoke particles. |
| WOS关键词 | POLYCYCLIC AROMATIC-HYDROCARBONS ; BIOMASS-BURNING EMISSIONS ; HUMIC-LIKE SUBSTANCES ; ORGANIC AEROSOL FORMATION ; BROWN CARBON ; CHEMICAL-PROPERTIES ; OPTICAL-PROPERTIES ; MASS ; PARTICULATE ; EVOLUTION |
| 资助项目 | National Key Research and Devel- opment Plan[2021YFC3001600] ; National Natural Science Foundation of China[U1733126] ; Funda- mental Research Funds for the Central Universities[WK2320000052] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| WOS记录号 | WOS:000860744600001 |
| 资助机构 | National Key Research and Devel- opment Plan ; National Natural Science Foundation of China ; Funda- mental Research Funds for the Central Universities |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/129129]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Zhang, Qixing |
| 作者单位 | 1.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Lab Atmospher Physico Chem, HFIPS, Hefei 230031, Anhui, Peoples R China 2.Yancheng Inst Technol, Sch Emergency Management & Safety Engn, Yancheng 224051, Jiangsu, Peoples R China 3.Yancheng Inst Technol, Sch Chem & Chem Engn, Yancheng 224051, Jiangsu, Peoples R China 4.Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Anhui, Peoples R China 5.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Ranran,Zhang, Qixing,Xu, Xuezhe,et al. Effect of photooxidation on size distribution, light absorption, and molecular compositions of smoke particles from rice straw combustion[J]. ENVIRONMENTAL POLLUTION,2022,311. |
| APA | Zhao, Ranran.,Zhang, Qixing.,Xu, Xuezhe.,Wang, Wenjia.,Zhao, Weixiong.,...&Zhang, Yongming.(2022).Effect of photooxidation on size distribution, light absorption, and molecular compositions of smoke particles from rice straw combustion.ENVIRONMENTAL POLLUTION,311. |
| MLA | Zhao, Ranran,et al."Effect of photooxidation on size distribution, light absorption, and molecular compositions of smoke particles from rice straw combustion".ENVIRONMENTAL POLLUTION 311(2022). |
入库方式： OAI收割
来源：合肥物质科学研究院
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