DOI: 10.1016/j.atmosenv.2013.11.045
Scopus记录号: 2-s2.0-84890226966
论文题名: Observation of ions and particles near busy roads using a neutral cluster and air ion spectrometer (NAIS)
作者: Jayaratne E ; R ; , Ling X ; , Morawska L
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 84 起始页码: 198
结束页码: 203
语种: 英语
英文关键词: Charged particle
; Dispersion
; Ion
; Pollution
; Vehicle emission
Scopus关键词: Charged particles
; Dispersion (waves)
; Dispersions
; Pollution
; Roads and streets
; Spectrometers
; Elevated concentrations
; Heavy duty diesel vehicles
; Ion concentrations
; Molecular cluster-ions
; Neutral clusters
; Particle concentrations
; Spatial dispersion
; Vehicle emission
; Ions
; ion
; nanoparticle
; atmospheric pollution
; dispersion
; health risk
; ion
; pollution exposure
; public health
; road
; spectrometer
; traffic emission
; wind velocity
; aerosol
; article
; concentration (parameters)
; dispersion
; neutral cluster and air ion spectrometer
; particle size
; priority journal
; spectrometer
; velocity
; wind
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: Motor vehicles emit large quantities of ions in the form of both charged particles and molecular cluster ions. While, the health effects of inhalation of charged particles is largely unexplored, the concentrations near busy roads and the distance to which these particles and ions are carried have important implications for the exposure of the large percentage of the population that lives close to such roadways. We measured ion concentrations using a neutral cluster and air ion spectrometer (NAIS) near seven busy roads carrying on the average approximately 7000vehiclesh-1 including about 15% heavy duty diesel vehicles. In this study, charged particle concentrations were measured as a function of downwind distance from the road for the first time. We show that, at a moderate wind speed of 2.0ms-1, mean charged particle concentrations at the kerb were of the order of 2×104cm-3 and, more importantly, decreased as d-0.6 where d is the distance from the road. While cluster ions were rapidly depleted by attachment to particles and were not carried to more than about 20m from the road, elevated concentrations of charged particle were detected up to at least 400m from the road. Most of the charge on the downwind side was carried on the larger particles, with no excess charge on particles smaller than about 10nm. At 30nm, particles carried more than double the charge they would normally carry in equilibrium. There are very few measurements of ions near road traffic and this is the first study of the spatial dispersion of charged particles from a road. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80938
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: International Laboratory for Air Quality and Health, Institute for Health and Biomedical Innovation, Queensland University of Technology, GPO Box 2434, Brisbane, QLD 4001, Australia
Recommended Citation:
Jayaratne E,R,, Ling X,et al. Observation of ions and particles near busy roads using a neutral cluster and air ion spectrometer (NAIS)[J]. Atmospheric Environment,2014-01-01,84