Aerosols
; Air pollution
; Dust
; Industrial emissions
; Mass spectrometers
; Mass spectrometry
; Organic carbon
; Pollution
; Potassium
; Spectrometers
; Aerosol mass spectrometers
; Carbonaceous particles
; Chemical compositions
; Chengdu
; In-depth understanding
; Meteorological condition
; Single particle
; Single particle mass spectrometry
; Particles (particulate matter)
; carbon
; element
; metal
; organic carbon
; organic nitrogen
; potassium
; sodium
; aerosol composition
; air mass
; atmospheric pollution
; biomass burning
; chemical composition
; concentration (composition)
; environmental conditions
; industrial emission
; mass spectrometry
; particulate matter
; pollution monitoring
; summer
; aerosol
; air pollution
; air quality
; ambient air
; Article
; atmosphere
; biomass
; chemical analysis
; China
; circadian rhythm
; combustion
; concentration (parameters)
; dilution
; dust
; mass spectrometer
; mass spectrometry
; measurement
; meteorology
; particle size
; particulate matter
; pollutant
; priority journal
; summer
; Chengdu
; China
; Sichuan
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:
Chengdu, the capital of Sichuan Province and the main city in Sichuan basin, is one of the heavily polluted cities in China. The characteristics of single particles in the atmosphere over Chengdu are critical for the in-depth understanding of their sources, formation mechanisms, and effects. In this study, a continuous ambient aerosol measurement was performed in summer in Chengdu with a single particle aerosol mass spectrometer (SPAMS) and other monitoring instruments. The particulate matter (PM) mass concentrations were low during our study period: PM2.5 and PM10 (aerosol particles with an aerodynamic diameter of less than 2.5 or 10�μm) were 40.5���23.6�μg�m−3 and 67.0���38.1�μg�m−3, respectively. This was mainly caused by the favorable meteorological conditions during the summer season. Twelve particle types were identified and classified as dust particles (Dust), four types of carbonaceous particles, organic nitrogen and potassium containing particles (KCN), four types of secondary particles, Na-K-containing particles (NaK), and metal-containing particles (Metal). The highest contribution of particles was from potassium with elemental carbon (KEC; 23.0%), and the lowest from elemental carbon (EC; 0.2%). All types of particles showed different diurnal variations and size distributions, which were closely related to their sources and reactions in the atmosphere. The eastern and southern air masses corresponded with high PM2.5 mass concentrations. The contributions of KEC and K-sulfate (KSO4) particles to PM2.5 were clearly higher than those in air masses from the southeast. During polluted days, the contributions of KEC and KSO4 particles increased, while the contributions of organic carbon (OC), combined OC and EC particles (OCEC), and K-nitrate (KNO3) particles decreased. This shows the importance of biomass burning and industrial emissions for the PM2.5 pollution in Chengdu. These results will be useful for the in-depth understanding of the PM2.5 pollution in Chengdu, even in Sichuan basin. � 2017 Elsevier Ltd
Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, China; Sichuan Environmental Monitoring Center, Chengdu, China; Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, College of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu, China; Chengdu Branch, Beijing Everise Technology Co., Ltd. HQ, Chengdu, China
Recommended Citation:
Zhang J,, Luo B,, Zhang J,et al. Analysis of the characteristics of single atmospheric particles in Chengdu using single particle mass spectrometry[J]. Atmospheric Environment,2017-01-01,157