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Fast sulfate formation from oxidation of SO2 by NO2 and HONO observed in Beijing haze
Wang, Junfeng; Li, Jingyi; Ye, Jianhuai; Zhao, Jian; Wu, Yangzhou; Hu, Jianlin; Liu, Dantong; Nie, Dongyang; Shen, Fuzhen; Huang, Xiangpeng; Huang, Dan Dan; Ji, Dongsheng; Sun, Xu; Xu, Weiqi; Guo, Jianping; Song, Shaojie; Qin, Yiming; Liu, Pengfei; Turner, Jay R.; Lee, Hyun Chul; Hwang, Sungwoo; Liao, Hong; Martin, Scot T.; Zhang, Qi; Chen, Mindong; Sun, Yele; Ge, Xinlei; Jacob, Daniel J.
2020-06-05
Source PublicationNATURE COMMUNICATIONS
ISSN2041-1723
Volume11Issue:1Pages:1-9
AbstractSevere events of wintertime particulate air pollution in Beijing (winter haze) are associated with high relative humidity (RH) and fast production of particulate sulfate from the oxidation of sulfur dioxide (SO2) emitted by coal combustion. There has been considerable debate regarding the mechanism for SO2 oxidation. Here we show evidence from field observations of a haze event that rapid oxidation of SO2 by nitrogen dioxide (NO2) and nitrous acid (HONO) takes place, the latter producing nitrous oxide (N2O). Sulfate shifts to larger particle sizes during the event, indicative of fog/cloud processing. Fog and cloud readily form under winter haze conditions, leading to high liquid water contents with high pH (>5.5) from elevated ammonia. Such conditions enable fast aqueous-phase oxidation of SO2 by NO2, producing HONO which can in turn oxidize SO2 to yield N2O.This mechanism could provide an explanation for sulfate formation under some winter haze conditions. How sulfur dioxide emitted through coal combustion is oxidized to sulfate particles during winter haze pollution events has been the subject of debate. Here, the authors show that rapid oxidation takes place by nitrogen dioxide and nitrous acid, producing nitrous oxide together with sulfate.
Department城市与区域生态国家重点实验室
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/44316
Collection城市与区域生态国家重点实验室
Recommended Citation
GB/T 7714
Wang, Junfeng,Li, Jingyi,Ye, Jianhuai,et al. Fast sulfate formation from oxidation of SO2 by NO2 and HONO observed in Beijing haze[J]. NATURE COMMUNICATIONS,2020,11(1):1-9.
APA Wang, Junfeng.,Li, Jingyi.,Ye, Jianhuai.,Zhao, Jian.,Wu, Yangzhou.,...&Jacob, Daniel J..(2020).Fast sulfate formation from oxidation of SO2 by NO2 and HONO observed in Beijing haze.NATURE COMMUNICATIONS,11(1),1-9.
MLA Wang, Junfeng,et al."Fast sulfate formation from oxidation of SO2 by NO2 and HONO observed in Beijing haze".NATURE COMMUNICATIONS 11.1(2020):1-9.
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