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Role of traffic in atmospheric accumulation of heavy metals and polycyclic aromatic hydrocarbons

Gunawardena, Janaka, Egodawatta, Prasanna, Ayoko, Godwin A., & Goonetilleke, Ashantha (2012) Role of traffic in atmospheric accumulation of heavy metals and polycyclic aromatic hydrocarbons. Atmospheric Environment, 54(July), pp. 502-510.

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Abstract

Traffic related emissions have been recognised as one of the main sources of air pollutants. In the research study discussed in this paper, variability of atmospheric total suspended particulate matter (TSP), polycyclic aromatic hydrocarbons (PAH) and heavy metal (HM) concentrations with traffic and land use characteristics during weekdays and weekends were investigated. Data required for the study were collected from a range of sampling sites to ensure a wide mix of traffic and land use characteristics.

The analysis undertaken confirmed that zinc has the highest concentration in the atmospheric phase during weekends as well as weekdays. Although the use of leaded gasoline was discontinued a decade ago, lead was the second most commonly detected heavy metal. This is attributed to the association of previously generated lead with roadside soil and re-suspension to the atmosphere. Soil related particles are the primary source of TSP and manganese to the atmosphere. The analysis further revealed that traffic sources are dominant in gas phase PAHs compared to the other sources during weekdays. Land use related sources become important contributors to atmospheric PAHs during weekends when traffic sources are at their minimal levels.

Impact and interest:

8 citations in Scopus
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7 citations in Web of Science®

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ID Code: 49781
Item Type: Journal Article
Keywords: air pollutants, air quality, heavy metals, polycyclic aromatic hydrocarbons, total suspended particulate matter, traffic emissions
DOI: 10.1016/j.atmosenv.2012.02.058
ISSN: 1352-2310
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ENVIRONMENTAL ENGINEERING (090700) > Environmental Engineering Design (090701)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ENVIRONMENTAL ENGINEERING (090700) > Environmental Engineering Modelling (090702)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Schools > School of Earth, Environmental & Biological Sciences
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 Elsevier
Copyright Statement: This is the author’s version of a work that was accepted for publication in <Atmospheric Environment>. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Atmospheric Environment, [VOL 54, ISSUE July, (2012)] DOI: 10.1016/j.atmosenv.2012.02.058
Deposited On: 19 Apr 2012 07:53
Last Modified: 19 Apr 2012 10:51

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