Seasonal variation characteristics of hydroxyl radical pollution and its potential formation mechanism during the daytime in Lanzhou | |
Wang, Guoying2; Jia, Shiming2; Li, Ruihong2; Ma, Shangrong2; Chen, Xuefu2; Wu, Zhijun1; Shi, Gaofeng2; Niu, Xiuli3 | |
刊名 | Journal of Environmental Sciences (China) |
2020-09-01 | |
卷号 | 95页码:58-64 |
关键词 | Air pollution control Atmospheric chemistry Atmospheric humidity Free radicals Nitrogen oxides Ozone Particles (particulate matter) Volatile organic compounds Fine particulate matter Fine particulate matter (PM2.5) Formation mechanism Hydroxyl free radicals Ozone concentration Rate determining step Regeneration pathway Seasonal variation |
ISSN号 | 10010742 |
DOI | 10.1016/j.jes.2020.03.045 |
英文摘要 | Hydroxyl free radicals (OH radicals) play the main role in atmospheric chemistry and their involving reactions are the dominant rate determining step in the formation of secondary fine particulate matter and in the removal of air pollutants from the atmosphere. In this paper, we studied the seasonal variation characteristics of OH radicals during the daytime in Lanzhou and explored the potential formation mechanism of high concentration OH radicals. We found that the OH radicals in four seasons was 2.7 × 106, 2.6 × 106, 3.1 × 106, and 2.2 × 106 cm−3, respectively. Since the rainfall was concentrated in summer, the wet deposition had a significant effect on removing OH radicals. Among the four pollutants (including ozone (O3), volatile organic compounds (VOCs), nitrogen dioxide (NO2) and fine particulate matter (PM2.5)), the variation of OH radicals were closely related to ozone concentration especially in spring and summer. In autumn, the correlation between PM2.5 and OH radicals were the closest among the observing pollutants and its formation mechanism was different conventional regeneration pathway. In Event 1, high concentration of ozone was the main source of OH radicals; under the high humidity condition, except for ozone, the multiple factors including VOCs, NO2 and PM2.5 interplayed and leaded to the Event 2. © 2020 |
WOS研究方向 | Environmental Sciences & Ecology |
语种 | 英语 |
出版者 | Chinese Academy of Sciences |
WOS记录号 | WOS:000548603700008 |
内容类型 | 期刊论文 |
源URL | [http://ir.lut.edu.cn/handle/2XXMBERH/115697] |
专题 | 石油化工学院 |
作者单位 | 1.State Key Joint Laboratory of Environment Simulation and Pollution Control (Peking University), College of Environmental Sciences and Engineering, Peking University, Beijing; 100871, China; 2.School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 3.Gansu Food Inspection and Research Institute, Lanzhou; 730030, China |
推荐引用方式 GB/T 7714 | Wang, Guoying,Jia, Shiming,Li, Ruihong,et al. Seasonal variation characteristics of hydroxyl radical pollution and its potential formation mechanism during the daytime in Lanzhou[J]. Journal of Environmental Sciences (China),2020,95:58-64. |
APA | Wang, Guoying.,Jia, Shiming.,Li, Ruihong.,Ma, Shangrong.,Chen, Xuefu.,...&Niu, Xiuli.(2020).Seasonal variation characteristics of hydroxyl radical pollution and its potential formation mechanism during the daytime in Lanzhou.Journal of Environmental Sciences (China),95,58-64. |
MLA | Wang, Guoying,et al."Seasonal variation characteristics of hydroxyl radical pollution and its potential formation mechanism during the daytime in Lanzhou".Journal of Environmental Sciences (China) 95(2020):58-64. |
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