A meta-analysis of selected near-road air pollutants based on concentration decay rates

被引:25
作者
Liu, Shi V. [1 ]
Chen, Fu-lin [1 ]
Xue, Jianping [1 ]
机构
[1] US EPA, Natl Exposure Res Lab, Off Res & Dev, Res Triangle Pk, NC 27711 USA
关键词
Environmental sciences; Atmospheric science; Near-road; Concentration decay; Meta-data analysis; Traffic; Air pollution; Distance; Vehicle emission; 3 TEXAS ROADWAYS; CHEMICAL-CHARACTERIZATION; POLLUTION EXPOSURE; PARTICULATE MATTER; RESPIRATORY HEALTH; TRAFFIC EMISSIONS; LAS-VEGAS; HIGHWAY; QUALITY; DISTANCE;
D O I
10.1016/j.heliyon.2019.e02236
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Traffic-related air pollution has been associated with various health risks for human populations living near roadways. Understanding the relationship between traffic density and dispersion of vehicle-released air pollutants is important for assessing human exposure to near-road air pollutants. We performed a literature survey targeting publications containing measurement data of traffic-related air pollutants near roads with distance information on their concentration distribution. Concentration decay rates over down-wind distance away from major roads were calculated for black carbon (BC), carbon monoxide (CO) and nitrogen oxides (NO2 or NOx) and meta-data analysis on these rates was performed. These analyses showed metadata-based exponential decay rates of 0.0026, 0.0019, 0.0004, and 0.0027 m(-1) for BC, CO, NO2 and NOx, respectively. Using these measurement data-based decay rates, concentrations for BC, CO, NO2 and NOx over various near-road distances were predicted. These results are useful for enhancing exposure modeling and thus more reliably assessing the health risk of exposure to near road air pollution.
引用
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页数:8
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