Environmentally Persistent Free Radical (EPFR) Formation by Visible-Light Illumination of the Organic Matter in Atmospheric Particles
文献类型：期刊论文
| 作者 | Chen, Qingcai1; Sun, Haoyao1; Wang, Mamin1; Wang, Yuqin1; Zhang, Lixin1; Han, Yuemei2 |
| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2019-09-03 |
| 卷号 | 53期号:17页码:10053-10061 |
| ISSN号 | 0013-936X |
| DOI | 10.1021/acs.est.9b02327 |
| 通讯作者 | Chen, Qingcai(chenqingcai@sust.edu.cn) |
| 英文摘要 | A secondary process may be an important source of environmentally persistent free radicals (EPFRs) in atmospheric particulates; yet, this process remains to be elucidated. This study demonstrated that secondary EPFRs could be generated by visible-light illumination of atmospheric particulate matter (PM), and their lifetimes were only 30 min to 1 day, which were much shorter than the lifetimes of the original EPFRs in PM. The yields of secondary EPFRs produced by PM could reach 15-60% of those of the original EPFRs. The extractable organic matter contributed to the formation of secondary EPFRs (similar to 55%), and a humic-like substance was the main precursor of the secondary EPFRs and was also the most productive precursor compared to the other aerosol components. The results of simulation experiments showed that the secondary EPFRs generated by the extractable and nonextractable PM components were similar to those produced by phenolic compounds and polycyclic aromatic hydrocarbons, respectively. We have found that oxygen molecules play an important role in the photochemical generation and decay of EPFRs. The reactive oxygen capture experiments showed that the original EPFRs may contribute to singlet oxygen generation, while the secondary EPFRs generated by photoexcitation may not produce singlet oxygen or hydroxyl radicals. |
| WOS关键词 | POLYCYCLIC AROMATIC-HYDROCARBONS ; PHOTOINDUCED TOXICITY ; COMBUSTION ; ANTHRACENE ; MODEL ; STABILIZATION ; ABSORPTION ; MECHANISMS ; REACTIVITY ; LIFETIMES |
| 资助项目 | National Natural Science Foundation of China[41877354] ; National Natural Science Foundation of China[41703102] ; Natural Science Foundation of Shaanxi Province, China[2018JM4011] |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | AMER CHEMICAL SOC |
| WOS记录号 | WOS:000484644500008 |
| 资助机构 | National Natural Science Foundation of China ; Natural Science Foundation of Shaanxi Province, China |
| 源URL | [http://ir.ieecas.cn/handle/361006/13438]  |
| 专题 | 地球环境研究所_粉尘与环境研究室 |
| 通讯作者 | Chen, Qingcai |
| 作者单位 | 1.Shaanxi Univ Sci & Technol, Sch Environm Sci & Engn, Xian 710021, Shaanxi, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Qingcai,Sun, Haoyao,Wang, Mamin,et al. Environmentally Persistent Free Radical (EPFR) Formation by Visible-Light Illumination of the Organic Matter in Atmospheric Particles[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2019,53(17):10053-10061. |
| APA | Chen, Qingcai,Sun, Haoyao,Wang, Mamin,Wang, Yuqin,Zhang, Lixin,&Han, Yuemei.(2019).Environmentally Persistent Free Radical (EPFR) Formation by Visible-Light Illumination of the Organic Matter in Atmospheric Particles.ENVIRONMENTAL SCIENCE & TECHNOLOGY,53(17),10053-10061. |
| MLA | Chen, Qingcai,et al."Environmentally Persistent Free Radical (EPFR) Formation by Visible-Light Illumination of the Organic Matter in Atmospheric Particles".ENVIRONMENTAL SCIENCE & TECHNOLOGY 53.17(2019):10053-10061. |
入库方式： OAI收割
来源：地球环境研究所
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