Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019JD030284 |
Influences of Atmospheric Pollution on the Contributions of Major Oxidation Pathways to PM2.5 Nitrate Formation in Beijing | |
Wang, Yan-Li1,2,3,4; Song, Wei2; Yang, Wen1; Sun, Xin-Chao2; Tong, Yin-Dong5; Wang, Xue-Mei6; Liu, Cong-Qiang2; Bai, Zhi-Peng1; Liu, Xue-Yan2 | |
2019-04-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:7页码:4174-4185 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Nitrate (NO3-), which is mainly oxidized from NO2 by the OH radical (OH center dot) and O-3 in the atmosphere, is a major component of inorganic aerosols. However, the contributions of the OH center dot and O3 pathways to NO3- in urban aerosols and the influence of air pollution to both pathways remain unclear. Oxygen isotopes of NO3- were measured for PM2.5 in Beijing in 2014. The Delta O-17-NO3- values (17.0-32.8 parts per thousand) were significantly higher in winter (27.2 +/- 3.6 parts per thousand) than in summer (24.2 +/- 1.3 parts per thousand). By estimating contributions of O-3 to the NOx cycle, the Delta O-17 values of NO3- endmembers produced via the NO2 + OH center dot (P1), NO3 center dot + DMS/HC (P2), and N2O5 hydrolysis (P3) pathways were calculated for each observation. The contributions of the three pathways (P1: 32 +/- 10%, P2: 34 +/- 10%, and P3: 34 +/- 20% annually) were calculated using the Stable Isotope Analysis in R model. We found that NO3- formation was dominated by the O3 oxidation pathways (P2 + P3; 68 +/- 23% annually, 73 +/- 21% in spring, 59 +/- 23% in summer, 75 +/- 20% in autumn, and 69 +/- 22% in winter). Moreover, PM2.5, NO2, and NO3- pollution decreased the importance of the OH center dot pathway relative to the O3 pathways for NO3- production. However, O3 pollution increased the importance of the OH center dot pathway relative to the O3 pathways for NO3- production. These results provided a comprehensive analysis on the oxygen isotope records in particulate NO3- for understanding the relative importance of major oxidation pathways of NO2. Atmospheric pollution substantially influenced the pathways of NO2 oxidation to NO3- in city environments. Plain Language Summary Air pollution is a major environmental and public health issue; to strengthen studies on haze formation mechanisms is a national environment demand. Although monitoring works have been widely conducted on atmospheric particulates, it has long been difficult to quantify production mechanisms of key chemical components. Combined oxygen isotopes (O-18, O-17) of nitrate with the Stable Isotope Analysis in R model, we evaluated the fractional contributions of three major oxidation pathways (NO2 + OH center dot [P1], NO3 center dot + DMS/HC [P2], and N2O5 hydrolysis [P3]) to the NO3- of PM2.5. We found that annually 68 +/- 23% of NO3- in PM2.5 at Beijing was produced by the O-3 oxidation pathways (P2 + P3). Moreover, PM2.5, NO2, and NO3- pollution decreased the importance of the OH center dot pathway relative to the O3 pathways for NO3- production. Our results provided a comprehensive analysis on the oxygen isotope records in particulate NO3- for understanding the relative importance of major oxidation pathways of NO2. Atmospheric pollution substantially influenced the pathways of NO2 oxidation to NO3- in city environments. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000467147400032 |
WOS关键词 | GROUND-LEVEL OZONE ; ISOTOPIC COMPOSITION ; TROPOSPHERIC OZONE ; NITROGEN ; DELTA-O-17 ; MODEL ; OH ; QUANTIFICATION ; FRACTIONATION ; UNCERTAINTY |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/182432 |
专题 | 气候变化 |
作者单位 | 1.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing, Peoples R China; 2.Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin, Peoples R China; 3.Chinese Acad Environm Planning, Beijing, Peoples R China; 4.Tianjin Normal Univ, Tianjin Key Lab Water Resources & Environm, Tianjin, Peoples R China; 5.Tianjin Univ, Coll Environm Sci & Engn, Tianjin, Peoples R China; 6.Jinan Univ, Inst Environm & Climate Res, Guangzhou, Guangdong, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Yan-Li,Song, Wei,Yang, Wen,et al. Influences of Atmospheric Pollution on the Contributions of Major Oxidation Pathways to PM2.5 Nitrate Formation in Beijing[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(7):4174-4185. |
APA | Wang, Yan-Li.,Song, Wei.,Yang, Wen.,Sun, Xin-Chao.,Tong, Yin-Dong.,...&Liu, Xue-Yan.(2019).Influences of Atmospheric Pollution on the Contributions of Major Oxidation Pathways to PM2.5 Nitrate Formation in Beijing.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(7),4174-4185. |
MLA | Wang, Yan-Li,et al."Influences of Atmospheric Pollution on the Contributions of Major Oxidation Pathways to PM2.5 Nitrate Formation in Beijing".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.7(2019):4174-4185. |
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