TY - JOUR
T1 - Ammonia in urban atmosphere can be substantially reduced by vehicle emission control
T2 - A case study in Shanghai, China
AU - Wu, Can
AU - Lv, Shaojun
AU - Wang, Fanglin
AU - Liu, Xiaodi
AU - Li, Jin
AU - Liu, Lang
AU - Zhang, Si
AU - Du, Wei
AU - Liu, Shijie
AU - Zhang, Fan
AU - Li, Jianjun
AU - Meng, Jingjing
AU - Wang, Gehui
N1 - Publisher Copyright:
© 2022
PY - 2023/4
Y1 - 2023/4
N2 - To investigate the impact of emission controls on ammonia (NH3) pollution in urban atmosphere, observation on NH3 (1 hr interval) was performed in Shanghai before, during and after the 2019 China International Import Expo (CIIE) event, along with measurements on inorganic ions, organic tracers and stable nitrogen isotope compositions of ammonium in PM2.5. NH3 during the CIIE period was 6.5±1.0 μg/m3, which is 41% and 32% lower than that before and after the event, respectively. Such a decrease was largely ascribed to the emission controls in nonagricultural sources, of which contribution for measured NH3 in control phase abated by ∼20% compared to that during uncontrol period. Molecular compositions of PAHs and hopanes further suggested a dominant role of the reduced vehicle emissions in the urban NH3 abatement during the CIIE period. Our results revealed that vehicle exhaust emission control is an effective way to mitigate NH3 pollution and improve air quality in Chinese urban areas.
AB - To investigate the impact of emission controls on ammonia (NH3) pollution in urban atmosphere, observation on NH3 (1 hr interval) was performed in Shanghai before, during and after the 2019 China International Import Expo (CIIE) event, along with measurements on inorganic ions, organic tracers and stable nitrogen isotope compositions of ammonium in PM2.5. NH3 during the CIIE period was 6.5±1.0 μg/m3, which is 41% and 32% lower than that before and after the event, respectively. Such a decrease was largely ascribed to the emission controls in nonagricultural sources, of which contribution for measured NH3 in control phase abated by ∼20% compared to that during uncontrol period. Molecular compositions of PAHs and hopanes further suggested a dominant role of the reduced vehicle emissions in the urban NH3 abatement during the CIIE period. Our results revealed that vehicle exhaust emission control is an effective way to mitigate NH3 pollution and improve air quality in Chinese urban areas.
KW - Ammonia
KW - Non-agricultural sources
KW - Organic tracers
KW - Vehicle emission
KW - stable nitrogen isotope
UR - https://www.scopus.com/pages/publications/85132525366
U2 - 10.1016/j.jes.2022.04.043
DO - 10.1016/j.jes.2022.04.043
M3 - 文章
C2 - 36503800
AN - SCOPUS:85132525366
SN - 1001-0742
VL - 126
SP - 754
EP - 760
JO - Journal of Environmental Sciences (China)
JF - Journal of Environmental Sciences (China)
ER -
