Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 575, Issue -, Pages 895-904Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2016.09.148
Keywords
Incremental lifetime cancer risk; Polycyclic aromatic hydrocarbons; Risk assessment; Urban road dust; Hydrocarbon pollution
Categories
Funding
- Chinese Scholarship Council (CSC)
- Queensland University of Technology (QUT)
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Among the numerous pollutants present in urban road dust, polycyclic aromatic hydrocarbons (PAHs) are among the most toxic chemical pollutants and can pose cancer risk to humans. The primary aim of the study was to develop a quantitative model to assess the cancer risk from PAHs in urban road dust based on traffic and land use factors and thereby to characterise the risk posed by PAHs in fine (<150 mu m) and coarse (>150 mu m) particles. The risk posed by PAHs was quantified as incremental lifetime cancer risk (ILCR), which was modelled as a function of traffic volume and percentages of different urban land uses. The study outcomes highlighted the fact that cancer risk from PAHs in urban road dust is primarily influenced by PAHs associated with fine solids. Heavy PAHs with 5 to 6 benzene rings, especially dibenzo[a,h]anthracene (D[a]A) and benzo[a] pyrene (B[a]P) in the mixture contribute most to the risk. The quantitative model developed based on traffic and land use factors will contribute to informed decision making in relation to the management of risk posed by PAHs in urban road dust. (C) 2016 Elsevier B.V. All rights reserved.
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