DOI: 10.1016/j.atmosenv.2017.04.001
Scopus记录号: 2-s2.0-85018476550
论文题名: Contribution of bacteria-like particles to PM2.5 aerosol in urban and rural environments
作者: Wolf R ; , El-Haddad I ; , Slowik J ; G ; , Dällenbach K ; , Bruns E ; , Vasilescu J ; , Baltensperger U ; , Prévôt A ; S ; H
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 160 起始页码: 97
结束页码: 106
语种: 英语
英文关键词: Aerosol mass spectrometry
; Bioaerosols
; Source apportionment
Scopus关键词: Aerodynamics
; Aerosols
; Bacteria
; Factorization
; Light scattering
; Mass spectrometers
; Mass spectrometry
; Particle size analysis
; Refractory materials
; Aerodyne aerosol mass spectrometer
; Aerosol mass spectrometry
; Bioaerosols
; Mass concentration
; Particle concentrations
; Positive Matrix Factorization
; Relative contribution
; Source apportionment
; Urban growth
; aerodynamics
; aerosol
; airborne survey
; ambient air
; concentration (composition)
; mass spectrometry
; particulate matter
; rural atmosphere
; source apportionment
; urban atmosphere
; aerosol
; airborne bacterium
; ambient air
; Article
; circadian rhythm
; density
; light scattering
; mass spectrometry
; nonhuman
; particulate matter
; priority journal
; rural area
; urban area
; Payerne
; Switzerland
; Vaud
; Zurich [Switzerland]
; Zurich [Zurich (ADS)]
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: We report highly time-resolved estimates of airborne bacteria-like particle concentrations in ambient aerosol using an Aerodyne aerosol mass spectrometer (AMS). AMS measurements with a newly developed PM2.5 and the standard (PM1) aerodynamic lens were performed at an urban background site (Zurich) and at a rural site (Payerne) in Switzerland. Positive matrix factorization using the multilinear engine (ME-2) implementation was used to estimate the contribution of bacteria-like particles to non-refractory organic aerosol. The success of the method was evaluated by a size-resolved analysis of the organic mass and the analysis of single particle mass spectra, which were detected with a light scattering system integrated into the AMS. Use of the PM2.5 aerodynamic lens increased measured bacteria-like concentrations, supporting the analysis method. However, at all sites, the low concentrations of this component suggest that airborne bacteria constitute a minor fraction of non-refractory PM2.5 organic aerosol mass. Estimated average mass concentrations were below 0.1 μg/m3 and relative contributions were lower than 2% at both sites. During rainfall periods, concentrations of the bacteria-like component increased considerably reaching a short-time maximum of approximately 2 μg/m3 at the Payerne site in summer. © 2017 The Authors Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82436
Appears in Collections: 气候变化事实与影响
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作者单位: Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen PSI, Switzerland; National Institute of Research and Development for Optoelectronics, Magurele, Romania
Recommended Citation:
Wolf R,, El-Haddad I,, Slowik J,et al. Contribution of bacteria-like particles to PM2.5 aerosol in urban and rural environments[J]. Atmospheric Environment,2017-01-01,160