TY - JOUR
T1 - Molecular characterization of firework-related urban aerosols using Fourier transform ion cyclotron resonance mass spectrometry
AU - Xie, Qiaorong
AU - Su, Sihui
AU - Chen, Shuang
AU - Xu, Yisheng
AU - Cao, Dong
AU - Chen, Jing
AU - Ren, Lujie
AU - Yue, Siyao
AU - Zhao, Wanyu
AU - Sun, Yele
AU - Wang, Zifa
AU - Tong, Haijie
AU - Su, Hang
AU - Cheng, Yafang
AU - Kawamura, Kimitaka
AU - Jiang, Guibin
AU - Liu, Cong-Qiang
AU - Fu, Pingqing
N1 - Funding Information:
Financial support. This research has been supported by the Na-
Funding Information:
tional Natural Science Foundation of China (grant nos. 41625014 and 41571130024).
Publisher Copyright:
© 2020 Author(s). This work is distributed under the Creative Commons Attribution 4.0 License.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/6/10
Y1 - 2020/6/10
N2 - Firework (FW) emission has strong impacts on air quality and public health. However, little is known about the molecular composition of FW-related airborne particulate matter (PM), especially the organic fraction. Here we describe the detailed molecular composition of Beijing PM collected before, during, and after a FW event in the evening of New Year's Eve in 2012. Subgroups of CHO, CHON, and CHOS were characterized using ultrahigh-resolution Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry. These subgroups comprise a substantial fraction of aromatic-like compounds with low O=C ratio and high degrees of unsaturation, some of which plausibly contributed to the formation of brown carbon in Beijing PM. Moreover, we found that the number concentration of sulfur-containing compounds, especially the organosulfates, increased dramatically during the FW event, whereas the number concentration of CHO and CHON doubled after the event, which was associated with multiple atmospheric aging processes including the multiphase redox chemistry driven by NOx, O3, and •OH. These findings highlight that FW emissions can lead to a sharp increase in high-molecular-weight compounds, particularly aromatic-like substances in urban particulate matter, which may affect the light absorption properties and adverse health effects of atmospheric aerosols.
AB - Firework (FW) emission has strong impacts on air quality and public health. However, little is known about the molecular composition of FW-related airborne particulate matter (PM), especially the organic fraction. Here we describe the detailed molecular composition of Beijing PM collected before, during, and after a FW event in the evening of New Year's Eve in 2012. Subgroups of CHO, CHON, and CHOS were characterized using ultrahigh-resolution Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry. These subgroups comprise a substantial fraction of aromatic-like compounds with low O=C ratio and high degrees of unsaturation, some of which plausibly contributed to the formation of brown carbon in Beijing PM. Moreover, we found that the number concentration of sulfur-containing compounds, especially the organosulfates, increased dramatically during the FW event, whereas the number concentration of CHO and CHON doubled after the event, which was associated with multiple atmospheric aging processes including the multiphase redox chemistry driven by NOx, O3, and •OH. These findings highlight that FW emissions can lead to a sharp increase in high-molecular-weight compounds, particularly aromatic-like substances in urban particulate matter, which may affect the light absorption properties and adverse health effects of atmospheric aerosols.
UR - http://www.scopus.com/inward/record.url?scp=85086718337&partnerID=8YFLogxK
U2 - 10.5194/acp-20-6803-2020
DO - 10.5194/acp-20-6803-2020
M3 - Journal article
AN - SCOPUS:85086718337
VL - 20
SP - 6803
EP - 6820
JO - Atmospheric Chemistry and Physics
JF - Atmospheric Chemistry and Physics
SN - 1680-7316
IS - 11
ER -