| Title: | Characterization of peroxyacetyl nitrate (PAN) under different PM(2.5) concentration in wintertime at a North China rural site |
| Author(s): | Li Z; Xie G; Chen H; Zhan B; Wang L; Mu Y; Mellouki A; Chen J; |
| Address: | "Department of Environmental Science & Engineering, Fudan Tyndall Center, Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China. Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. Institut de Combustion, Aerothermique, Reactivite et Environnement, Centre National de la Recherche Scientifique, 45071 Orleans cedex 02, France. Department of Environmental Science & Engineering, Fudan Tyndall Center, Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. Electronic address: jmchen@fudan.edu.cn" |
| DOI: | 10.1016/j.jes.2021.08.040 |
| ISSN/ISBN: | 1001-0742 (Print) 1001-0742 (Linking) |
| Abstract: | "As a secondary pollutant of photochemical pollution, peroxyacetyl nitrate (PAN) has attracted a close attention. A four-month campaign was conducted at a rural site in North China Plain (NCP) including the measurement of PAN, O(3), NO(x), PM(2.5), oxygenated volatile organic compounds (OVOCs), photolysis rate constants of NO(2) and O(3) and meteorological parameters to investigate the wintertime characterization of photochemistry from November 2018 to February 2019. The results showed that the maximum and mean values of PAN were 4.38 and 0.93 +/- 0.67 ppbv during the campaign, respectively. The PAN under different PM(2.5) concentrations from below 75 mug/m(3) up to 250 mug/m(3), showed different diurnal variation and formation rate. In the PM(2.5) concentration range of above 250 mug/m(3), PAN had the largest daily mean value of 0.64 ppbv and the fastest production rate of 0.33 ppbv/hr. From the perspective of PAN's production mechanism, the light intensity and precursors concentrations under different PM(2.5) pollution levels indicated that there were sufficient light intensity and high volatile organic compounds (VOCs) and NO(x) precursors concentration even under severe pollution level to generate a large amount of PAN. Moreover, the bimodal staggering phenomenon of PAN and PM(2.5) provided a basis that PAN might aggravate haze through secondary organic aerosols (SOA) formation" |
| Keywords: | *Air Pollutants/analysis Attention China Environmental Monitoring Particulate Matter/analysis Peracetic Acid/analogs & derivatives Seasons *Volatile Organic Compounds/analysis North China Pm(2.5) Peroxyacetyl nitrate Rural site Wintertime; |
| Notes: | "MedlineLi, Zhuoyu Xie, Guangzhao Chen, Hui Zhan, Bixin Wang, Lin Mu, Yujing Mellouki, Abdelwahid Chen, Jianmin eng Netherlands 2022/04/24 J Environ Sci (China). 2022 Apr; 114:221-232. doi: 10.1016/j.jes.2021.08.040. Epub 2022 Feb 21" |
