TY - JOUR
T1 - Seasonal trends and light extinction effects of PM2.5 chemical composition from 2021 to 2022 in a typical industrial city of central China
AU - Zhan, Changlin
AU - Wei, Chong
AU - Liu, Ziguo
AU - Liu, Hongxia
AU - Yang, Xuefen
AU - Zheng, Jingru
AU - Liu, Shan
AU - Quan, Jihong
AU - Zhang, Yong
AU - Wang, Qiyuan
AU - Li, Nan
AU - Cao, Junji
N1 - Publisher Copyright:
© 2024 Elsevier Ltd
PY - 2025/1/15
Y1 - 2025/1/15
N2 - This study investigates the concentrations, chemical compositions, and sources of PM2.5 in Huangshi, China. Daily average PM2.5 levels ranged from 8.43 to 193.08 μg m−3, with an annual mean of 54.13 μg m−3, exceeding China's annual secondary standard of 35 μg m−3. Seasonal mean concentrations peaked in winter and were lowest in summer. Organic carbon (OC) and elemental carbon (EC) had annual means of 4.89 μg m−3 and 0.94 μg m−3, respectively. Water-soluble inorganic ions (WSIIs) accounted for 52.17% of PM2.5, with NO3−, SO42−, and NH4+ being the major components. The NO3−/SO42− ratio averaged 1.65, indicating a transition from coal combustion to vehicle emissions as the primary pollution source. Chemical mass reconstruction revealed that NH4NO3, (NH4)2SO4, and organic matter (OM) accounted for 65.3% of PM2.5 mass. Seasonal variations in light extinction (bext) highlighted the impact of secondary inorganic salts on visibility, with an annual average bext of 346.30 ± 246.98 Mm−1. Airmass clusters and potential source region analysis suggested PM2.5 and its components were primarily originated from local and nearby regions. These findings underscore the effectiveness of local pollution control measures, changing pollution sources, and the necessity for targeted emission controls to improve air quality and visibility in urban areas.
AB - This study investigates the concentrations, chemical compositions, and sources of PM2.5 in Huangshi, China. Daily average PM2.5 levels ranged from 8.43 to 193.08 μg m−3, with an annual mean of 54.13 μg m−3, exceeding China's annual secondary standard of 35 μg m−3. Seasonal mean concentrations peaked in winter and were lowest in summer. Organic carbon (OC) and elemental carbon (EC) had annual means of 4.89 μg m−3 and 0.94 μg m−3, respectively. Water-soluble inorganic ions (WSIIs) accounted for 52.17% of PM2.5, with NO3−, SO42−, and NH4+ being the major components. The NO3−/SO42− ratio averaged 1.65, indicating a transition from coal combustion to vehicle emissions as the primary pollution source. Chemical mass reconstruction revealed that NH4NO3, (NH4)2SO4, and organic matter (OM) accounted for 65.3% of PM2.5 mass. Seasonal variations in light extinction (bext) highlighted the impact of secondary inorganic salts on visibility, with an annual average bext of 346.30 ± 246.98 Mm−1. Airmass clusters and potential source region analysis suggested PM2.5 and its components were primarily originated from local and nearby regions. These findings underscore the effectiveness of local pollution control measures, changing pollution sources, and the necessity for targeted emission controls to improve air quality and visibility in urban areas.
KW - Airmass clusters
KW - Chemical composition
KW - Light extinction and visibility
KW - Organic carbon (OC) and elemental carbon (EC)
KW - PM
KW - Water-soluble inorganic ions
UR - https://www.scopus.com/pages/publications/85208769880
U2 - 10.1016/j.atmosenv.2024.120922
DO - 10.1016/j.atmosenv.2024.120922
M3 - 文章
AN - SCOPUS:85208769880
SN - 1352-2310
VL - 341
JO - Atmospheric Environment
JF - Atmospheric Environment
M1 - 120922
ER -
可持续发展目标 11 可持续城市和社区