DOI: 10.1016/j.atmosenv.2017.11.060
Scopus记录号: 2-s2.0-85037665896
论文题名: Field evaluation of vegetation and noise barriers for mitigation of near-freeway air pollution under variable wind conditions
作者: Lee E ; S ; , Ranasinghe D ; R ; , Ahangar F ; E ; , Amini S ; , Mara S ; , Choi W ; , Paulson S ; , Zhu Y
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 175 起始页码: 92
结束页码: 99
语种: 英语
英文关键词: Near-road
; Noise barriers
; Particulate matter
; Ultrafine particles
; Vegetation barriers
Scopus关键词: Acoustic noise measurement
; Air pollution
; Particle size
; Pollution
; Roadsides
; Vegetation
; Wind
; Near-road
; Noise barriers
; Particle concentrations
; Particle size ranges
; Particulate Matter
; Pollution mitigation
; Roadside barriers
; Ultrafine particle
; Particles (particulate matter)
; atmospheric pollution
; concentration (composition)
; field survey
; noise
; noise pollution
; particle size
; particulate matter
; pollution control
; public health
; roadside environment
; traffic emission
; vegetation cover
; wind profile
; wind velocity
; air pollution
; Article
; California
; information processing
; noise
; particle size
; particulate matter
; priority journal
; vegetation
; wind
; California
; United States
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: Traffic-related air pollutants are a significant public health concern, particularly near freeways. Previous studies have suggested either soundwall or vegetation barriers might reduce the near-freeway air pollution. This study aims to investigate the effectiveness of a combination of both soundwall and vegetation barrier for reducing ultrafine particles (UFPs, diameter ≤ 100 nm) and PM2.5 (diameter ≤ 2.5 μm) concentrations. Concurrent data collection was carried out at both upwind and downwind fixed locations approximately 10–15 m away from the edge of two major freeways in California. This study observed that the reduction of UFP and PM2.5 was generally greater with the combination barrier than with either soundwall or vegetation alone. Since there were no non-barrier sites at the study locations, the reductions reported here are all in relative terms. The soundwall barrier was more effective for reducing PM2.5 (25–53%) than UFPs (0–5%), and was most effective (51–53% for PM2.5) when the wind speed ranged between 1 and 2 m/s. Under the same range of wind speed, the vegetation barrier had little effect (0–5%) on reducing PM2.5; but was effective at reducing UFP (up to 50%). For both types of roadside barrier, decreasing wind speed resulted in greater net reduction of UFPs (i.e., total number particle concentrations; inversely proportional). This trend was observed, however, only within specific particle size ranges (i.e., diameter < 20 nm for the soundwall barrier and 12–60 nm for the vegetation barrier). Out of these size ranges, the reduction of UFP concentration was proportional to increasing wind speed. Overall findings of this study support positive effects of soundwall and vegetation barriers for near-freeway air pollution mitigation. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83092
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Environmental Health Sciences, University of California, Los Angeles, CA, United States; Department of Atmospheric & Oceanic Sciences, University of California, Los Angeles, CA, United States; Department of Mechanical Engineering, University of California, Riverside, CA, United States; California Air Resources Board, Research Division, Sacramento, CA, United States
Recommended Citation:
Lee E,S,, Ranasinghe D,et al. Field evaluation of vegetation and noise barriers for mitigation of near-freeway air pollution under variable wind conditions[J]. Atmospheric Environment,2018-01-01,175