DOI: 10.1016/j.atmosenv.2014.04.011
Scopus记录号: 2-s2.0-84899529189
论文题名: Characterization of black carbon at roadside sites and along vehicle roadways in the Bangkok Metropolitan Region
作者: Hung N ; T ; Q ; , Lee S ; -B ; , Hang N ; T ; , Kongpran J ; , Kim Oanh N ; T ; , Shim S ; -G ; , Bae G ; -N
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 92 起始页码: 231
结束页码: 239
语种: 英语
英文关键词: Bangkok
; Black carbon
; Rain
; Season
; Traffic
; Vehicle exhaust
Scopus关键词: Drought
; Particulate emissions
; Rain
; Telecommunication traffic
; Bangkok
; Black carbon
; Determination coefficients
; Metropolitan regions
; Prevailing wind directions
; Season
; Seasonal differences
; Vehicle exhausts
; Roadsides
; black carbon
; elemental carbon
; industrial chemical
; nitrogen oxide
; unclassified drug
; atmospheric pollution
; black carbon
; megacity
; metropolitan area
; particle size
; pedestrian
; rainfall
; roadside environment
; seasonality
; traffic emission
; wind direction
; zoo
; air pollution control
; air quality control
; article
; concentration (parameters)
; dry deposition
; environmental exposure
; human
; normal value
; pollution monitoring
; priority journal
; seasonal variation
; Thailand
; traffic noise
; urban area
; wet deposition
; wind
; Bangkok
; Central Region [Thailand]
; Krung Thep Mahanakhon
; Thailand
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: To understand the seasonality of concentrations of traffic-related black carbon (BC) in a megacity, BC concentrations in fine particles were monitored at the roadside and on roads during both the wet and dry seasons of 2010 in the city center of Bangkok, Thailand. The BC concentration measured every 2min by an aethalometer at the Dingdaeng roadside in the dry season was 17.9±6.6μgm-3, which was 1.6-fold higher than the value (11.5±2.7μgm-3) during the wet season. This seasonal difference could not be explained by washout by rain but was instead due to more frequent upwind conditions caused by a prevailing wind direction from the monitoring site toward the road in the wet season. When the prevailing wind direction was from the road, the average BC concentration at the roadside increased up to 30μgm-3 during both seasons. In contrast, when the wind direction was from the site to the road, the BC concentration was reduced to the level of urban background concentrations measured inside Lumphini Park and the Dusit Zoo of Bangkok. Roadside BC concentrations were strongly correlated with NOx concentrations and elemental carbon (EC) concentrations measured in 24-h PM2.5 filter samples. Both relationships exhibited linear determination coefficients of more than 0.80, implying that NOx can be used as an indicator and an alternative for traffic-related BC at this roadside site when real-time BC monitors are not available.The average on-road BC concentration (25.5μgm-3) was similar to the average at the roadside under downwind conditions (25.5μgm-3) from morning to evening only. In contrast, the latter value was 1.7-fold higher than the daily average at the roadside (14.7μgm-3) and 7.3-fold higher than the urban background level during the daytime (3.5μgm-3). The results of this study suggest that residents who live next to major roads, pedestrians at the roadside, and drivers on the roads experience a high risk of exposure to severe levels of traffic-related air pollutants. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80879
Appears in Collections: 气候变化事实与影响
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作者单位: Center for Environment, Health and Welfare Research, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, South Korea; Environmental Engineering Department, Faculty of Environment and Resource, NONG LAM University, Hamlet 6, Linh Trung Ward, Thu Duc District, HoChiMinh City, Viet Nam; Environmental Engineering and Management, School of Environment, Resources and Development, Asian Institute of Technology, Klong Luang, Pathumthani 12120, Thailand
Recommended Citation:
Hung N,T,Q,et al. Characterization of black carbon at roadside sites and along vehicle roadways in the Bangkok Metropolitan Region[J]. Atmospheric Environment,2014-01-01,92