DOI: 10.1016/j.atmosenv.2015.09.050
Scopus记录号: 2-s2.0-84944046343
论文题名: Diurnal variability of polycyclic aromatic compound (PAC) concentrations: Relationship with meteorological conditions and inferred sources
作者: Alam M ; S ; , Keyte I ; J ; , Yin J ; , Stark C ; , Jones A ; M ; , Harrison R ; M
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 122 起始页码: 427
结束页码: 438
语种: 英语
英文关键词: Diurnal variations
; Nitro-PAH
; Polycyclic aromatic compounds
; Polycyclic aromatic hydrocarbons
; Quinones
; Source processes
Scopus关键词: Air pollution
; Aromatic compounds
; Aromatic hydrocarbons
; Aromatization
; Atmospheric movements
; Coal combustion
; Housing
; Hydrocarbons
; Molecular weight
; Pollution
; Urban growth
; Wind
; Atmospheric chemical reaction
; Diurnal variation
; Low molecular weight
; Meteorological condition
; Polycyclic aromatic compounds
; Polycyclic aromatic hydrocarbon (PAH)
; Quinones
; Source process
; Polycyclic aromatic hydrocarbons
; coal
; nitropyrene
; polycyclic aromatic hydrocarbon
; quinone derivative
; atmospheric pollution
; biomass burning
; combustion
; comparative study
; concentration (composition)
; day length
; dilution
; dispersion
; exhaust emission
; PAH
; residential development
; road traffic
; spatiotemporal analysis
; time series
; urban atmosphere
; wind velocity
; air pollutant
; air quality
; air quality standard
; Article
; biomass
; burn
; chemical reaction
; circadian rhythm
; combustion
; controlled study
; low temperature
; meteorology
; molecular weight
; particulate matter
; priority journal
; smoke
; summer
; temperature
; time series analysis
; velocity
; wind
; winter
; wood
; Birmingham [England]
; England
; United Kingdom
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: Polycyclic aromatic hydrocarbons (PAH) and their nitro and oxy derivatives have been sampled every three hours over one week in winter at two sites in Birmingham UK. One site is heavily influenced by road traffic and is close to residential dwellings, while the other site is a background urban location at some distance from both sources of emission. The time series of concentrations has been examined along with the ratio of concentrations between the two sampling sites. A comparison of averaged diurnal profiles has shown different patterns of behaviour which has been investigated through calculating ratios of concentration at 18:00-21:00 h relative to that at 06:00-09:00 h. This allows identification of those compounds with a strong contribution to a traffic-related maximum at 06:00-09:00 h which are predominantly the low molecular weight PAHs, together with a substantial group of quinones and nitro-PAHs. Changes in partitioning between vapour and particulate forms are unlikely to influence the ratio as the mean temperature at both times was almost identical. Most compounds show an appreciable increase in concentrations in the evening which is attributed to residential heating emissions. Compounds dominated by this source show high ratios of 18:00-21:00 concentrations relative to 06:00-09:00 concentrations and include higher molecular weight PAH and a substantial group of both quinones and nitro-PAH. The behaviour of retene, normally taken as an indicator of biomass burning, is suggestive of wood smoke only being one contributor to the evening peak in PAH and their derivatives, with coal combustion presumably being the other main contributor. Variations of PAH concentrations with wind speed show a dilution behaviour consistent with other primary pollutants, and high concentrations of a range of air pollutants were observed in an episode of low temperatures and low wind speeds towards the end of the overall sampling period consistent with poor local dispersion processes. Results from a short summer campaign give indications of the formation of some nitro-PAH by atmospheric chemical reactions. © 2015 The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81431
Appears in Collections: 气候变化事实与影响
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作者单位: Division of Environmental Health and Risk Management, School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom
Recommended Citation:
Alam M,S,, Keyte I,et al. Diurnal variability of polycyclic aromatic compound (PAC) concentrations: Relationship with meteorological conditions and inferred sources[J]. Atmospheric Environment,2015-01-01,122