Abstract
A semi-empirical statistical model based on physical processes intended for simulation of traffic pollution dispersion near roadways is applied. The pollution sources are a road and associated transport, which in the model are simulated as an undeviating cut-off cylinder, formed along the road surface and filled with aerosol particles. The dispersion of the cloud of these aerosol particles into the environment by crosswind directed perpendicular to the road is investigated, including the gravitation, particle buoyancy, and diffusion of atmosphere effects. The main focus is on the concentration change of the particles in size range of 0.05–0.22 μm when receded further from the road in the direction of the wind. Parameters of the model are adjusted to data of the experiment above the ground surface in horizontal locality. Good agreement between the model and experimental results is obtained.
Highlights
Traffic pollution depending from various reasons has a large impact on ecological processes and various components of ecosystems and causes serious health effects
It is determined that traffic pollution effect on human health depends directly on total aerosol particles concentration, without distinguishing concrete particles, the effect increases due to ultrafine particles, which are produced in the engines of vehicles
A better congruity with the experiment was obtained when the wind speed was 1.0 m/s because selected parameters of the model not always correspond precisely to the aerosol particles in the size ranges of 0.05–0.1 μm, as at the same distance there are particles in the size ranges of 0.1–0.22 μm, dispersion of which is similar
Summary
Traffic pollution depending from various reasons has a large impact on ecological processes and various components of ecosystems and causes serious health effects. It forms about 70% of the whole air pollution in the biggest cities of Europe and Lithuania (Vaiškūnaitė et al 2009). The breeze that blows from the ocean keeps the stable speed perpendicular to the road for a long time. This makes average concentration of the measured sizes not inconsiderable, for example 30 m distance from the road it was 1.7–2.2 ppm, 3.4–10 μg/m3, (1.3–2.0) × 105 1/cm and 30.2–64.6 μg/m3, respectively. It is determined that Pb, Zn, Mb, As are distributed mainly in fine aerosols, and the noxiousness of heavy metals for human health is well known
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
