Aerosols
; Air quality
; Factorization
; Fog
; Organic carbon
; Organic compounds
; Pollution
; Quality assurance
; Quality control
; Sulfur dioxide
; Urban growth
; Volatile organic compounds
; Chemical compositions
; Chemical mass closure
; Control measures
; Parade blue
; Positive Matrix Factorization
; Secondary aerosols
; Air pollution
; carbon
; carbon dioxide
; elemental carbon
; nitrogen dioxide
; organic carbon
; organic matter
; particular organic matter
; sulfur dioxide
; unclassified drug
; volatile organic compound
; aerosol
; atmospheric pollution
; carbon monoxide
; chemical composition
; concentration (composition)
; dye
; nitrous oxide
; particulate matter
; particulate organic matter
; pollution monitoring
; volatile organic compound
; aerosol
; air pollutant
; air pollution control
; air quality
; Article
; chemical composition
; China
; mineral dust
; online monitoring
; particulate matter
; priority journal
; urban area
; Beijing [China]
; China
; Sia
Scopus学科分类:
Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要:
In order to investigate the effects of the temporary strengthening of air quality assurance controlling measures during the Beijing 2015 IAAF World Championships and the Military Parade Assurance Period (MPAP) in China, we collected daily PM2.5aerosol samples at three typical sites (urban downtown, suburban and rural background area, respectively) in Beijing and investigated the variations of concentration of the water-soluble ions, elemental constituents, organic carbon (OC) and elemental carbon (EC) in PM2.5from Aug.15 to Sept.10, 2015. Simultaneously, 1-h high-resolution continuous monitoring results of PM2.5mass concentration as well as the chemical components which were measured at another online monitoring urban site were incorporated. The concentrations of PM2.5and other gaseous pollutants (SO2, NO2and CO) during the parade control period (Aug.20-Sept.3) exhibited a substantially decrease compared with the concentrations during both the non-control (August 15 to August 19 and September 4 to September 10) period and the same period in 2014. According to the CMC results, the major components were identified as secondary inorganic aerosol (SIA, the combination of sulfate, ammonium and nitrate), mineral dust and particular organic matter (POM), which together accounted for more than 80% of PM2.5in urban and suburban sites. POM is found to account for the largest proportion, and the obviously higher proportion of POM in the urban area revealed the significance contribution from vehicles. Compared with the non-control period, the mass concentrations of SIA and secondary organic carbon (SOC) decreased obviously. However, SIA and SOC are observed to play an important role in contributing to the rapid growth process of PM2.5under unfavorable meteorological conditions during the control period. In view of the gradual improvement of air quality in Beijing, as well as the contribution of secondary aerosol formations in total PM2.5, effective control of primary gaseous pollutants and volatile organic compounds (VOCs) will be very significant for further lowering the concentration of PM2.5in Beijing in normal time. � 2017 Elsevier Ltd
State Key Joint Laboratory of Environmental Simulation & Pollution Control, School of Environment, Beijing Normal University, Beijing, China; Chinese Research Academy of Environmental Sciences, Beijing, China; National Engineering Research Center of Urban Environmental Pollution Control, Beijing Municipal Research Institute of Environmental Protection, Beijing, China; Shanghai Key Laboratory of Atmospheric Particle Pollution Prevention, Department of Environment Science and Engineering, Fudan University, Shanghai, China; Center for Atmospheric Environmental Studies, Beijing Normal University, Beijing, China
Recommended Citation:
Wang Y,, Xue Y,, Tian H,et al. Effectiveness of temporary control measures for lowering PM2.5pollution in Beijing and the implications[J]. Atmospheric Environment,2017-01-01,157