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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472
EISSN: 1735-2630
Vol. 11, No. 8, 2014, pp. 2329-2336
Bioline Code: st14223
Full paper language: English
Document type: Research Article
Document available free of charge

International Journal of Environment Science and Technology, Vol. 11, No. 8, 2014, pp. 2329-2336

 en Influence of traffic characteristics on polycyclic aromatic hydrocarbon build-up on urban road surfaces
Gunawardena, J.; Ziyath, A.M.; Egodawatta, P.; Ayoko, G.A. & Goonetilleke, A.

Abstract

Traffic is one of the prominent sources of polycyclic aromatic hydrocarbons (PAHs), and road surfaces are the most critical platform for stormwater pollution. Build-up of pollutants on road surfaces was the focus of this research study. The study found that PAHs build-up on road surfaces primarily originate from traffic activities, specifically gasoline powered vehicles. Other sources such as diesel vehicles, industrial oil combustion and incineration were also found to contribute to the PAH build-up. Additionally, the study explored the linkages between concentrations of PAHs and traffic characteristics such as traffic volume, vehicle mix and traffic flow. While traffic congestion was found to be positively correlated with 6-ring and 5-ring PAHs in road build-up, it was negatively correlated with 3-ring and 4 ring PAHs. The absence of positive correlation between 3-ring and 4-ring PAHs and traffic parameters is attributed to the propensity of these relatively volatile PAHs to undergo re-suspension and evaporation. The outcomes of this study are expected to contribute to effective transport and land use planning for the prevention of PAH pollution in the urban environment.

Keywords
Stormwater quality; Traffic emissions; Congestion; Traffic volume; Stormwater pollutant processes

 
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