Severe air pollution events not avoided by reduced anthropogenic activities during COVID-19 outbreak

P Wang, K Chen, S Zhu, P Wang, H Zhang - Resources, Conservation and …, 2020 - Elsevier
Due to the pandemic of coronavirus disease 2019 in China, almost all avoidable activities in
China are prohibited since Wuhan announced lockdown on January 23, 2020. With reduced …

Abundant NH3 in China Enhances Atmospheric HONO Production by Promoting the Heterogeneous Reaction of SO2 with NO2

S Ge, G Wang, S Zhang, D Li, Y Xie, C Wu… - Environmental …, 2019 - ACS Publications
High levels of HONO have frequently been observed in Chinese haze periods and
underestimated by current models due to some unknown sources and formation …

Persistent high PM2. 5 pollution driven by unfavorable meteorological conditions during the COVID-19 lockdown period in the Beijing-Tianjin-Hebei region, China

ID Sulaymon, Y Zhang, PK Hopke, J Hu, Y Zhang… - Environmental …, 2021 - Elsevier
Lockdown measures to curtail the COVID-19 pandemic in China halted most non-essential
activities on January 23, 2020. Despite significant reductions in anthropogenic emissions …

[HTML][HTML] Ammonium nitrate promotes sulfate formation through uptake kinetic regime

Y Liu, Z Feng, F Zheng, X Bao, P Liu… - Atmospheric …, 2021 - acp.copernicus.org
Although the anthropogenic emissions of SO 2 have decreased significantly in China, the
decrease in SO 4 2-in PM 2.5 is much smaller than that of SO 2. This implies an enhanced …

Rapid sulfate formation from synergetic oxidation of SO2 by O3 and NO2 under ammonia-rich conditions: Implications for the explosive growth of atmospheric PM2. 5 …

S Zhang, D Li, S Ge, S Liu, C Wu, Y Wang… - Science of the Total …, 2021 - Elsevier
Extremely high levels of atmospheric sulfate aerosols have still frequently occurred in China
especially in winter haze periods and often been underestimated by models due to some …

Study on the characteristics of sulfate ion in condensable particulate matter from ultra-low emission coal-fired power plants

F Zhang, L Yang, Z Sheng, T Wu, T Hu - Journal of Cleaner Production, 2023 - Elsevier
Abstract The sulfate ion (SO 4 2−) in condensable particulate matters (CPM) discharged by
ultra-low emission coal-fired power plants has caused a series of environmental problems …

Changes in ammonia and its effects on PM2. 5 chemical property in three winter seasons in Beijing, China

Z Meng, L Wu, X Xu, W Xu, R Zhang, X Jia… - Science of The Total …, 2020 - Elsevier
Abstract NH 3, SO 2, NO x and the inorganic ions of PM 2.5 in winter 2009, 2014 and 2016
were examined to investigate the change in NH 3 and aerosol chemistry in Beijing, China …

Intensified wintertime secondary inorganic aerosol formation during heavy haze pollution episodes (HPEs) in Beijing, China

L Wu, X Zhang, J Sun, Y Wang, J Zhong… - Journal of Environmental …, 2022 - Elsevier
Air pollution in China is complex, and the formation mechanism of chemical components in
particulate matter is still unclear. This study selected three consecutive heavy haze pollution …

Influence of Chinese New Year overlapping COVID-19 lockdown on HONO sources in Shijiazhuang

Y Liu, S Ni, T Jiang, S Xing, Y Zhang, X Bao… - Science of the Total …, 2020 - Elsevier
Nitrous acid (HONO) is an important precursor of hydroxyl radical (OH) in the atmosphere. It
is also toxic to human health. In this work, HONO concentrations were measured in …

Molecular characteristics, source contributions, and exposure risks of polycyclic aromatic hydrocarbons in the core city of Central Plains Economic Region, China …

Z Dong, N Jiang, R Zhang, Q Xu, Q Ying, Q Li… - Science of the Total …, 2021 - Elsevier
In this study, molecular characteristics, source contributions, and health risks of polycyclic
aromatic hydrocarbons (PAHs) in PM 2.5 for four haze levels in Zhengzhou, a megacity in …