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

Gunawardena, Janaka; Egodawatta, Prasanna; Ayoko, Godwin A.

doi:10.1016/j.atmosenv.2012.02.058

Cited by 97 publications

(34 citation statements)

References 22 publications

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“…Factor 3 is characterized with high fractions of elements of Pb (46.69%), Se (42.25%), Zn (30.75%), V (25.61%), Cu (23.60%) was identified as traffic source since these elements could be emitted by tyre and brake wearing (Gunawardena et al, 2012;Harrison et al, 2003), oil additives containing Zn and Cu, fuel oil combustion leading to emissions of Pb and V (Karnae and John, 2011). The mean contribution of traffic source to the total elements was 19.9%.…”

Section: Source Apportionmentmentioning

confidence: 99%

Source identification of trace elements in the atmosphere during the second Asian Youth Games in Nanjing, China: Influence of control measures on air quality

Zhang

et al. 2016

Atmospheric Pollution Research

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Section: Source Apportionmentmentioning

confidence: 99%

Source identification of trace elements in the atmosphere during the second Asian Youth Games in Nanjing, China: Influence of control measures on air quality

Zhang

et al. 2016

Atmospheric Pollution Research

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“…However, BghiP, IN, and DBA, as well as benzo(a)pyrene (BaP) and benzo(a)naphtalene (BaA), were linked with gasoline emission sources [25][26][27]. Gunawardena et al [28] concluded that heavy-duty traffic primarily generated five-and six-ring PAHs. They correlated heavy-duty traffic sources with fluorene, dibenz(a,h)anthracene, indeno(1,2,3-cd)pyrene, and benzo(ghi)perylene, whereas acenaphthene, acenaphthylene, phenanthrene, pyrene, benzo(a)pyrene, and benzo(e)pyrene were correlated with the total traffic volume.…”

Section: Results For Individual Pahsmentioning

confidence: 99%

Polycyclic Aromatic Hydrocarbons in the Particles Emitted from the Diesel and Gasoline Engines

Szewczyńska¹,

Dąbrowska²,

Pyrzyńska³

2017

Pol. J. Environ. Stud.

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Emissions from motor vehicles have substantially changed over the last decade because of new fuels, changed engine designs, and improved emission-control technology. Engine exhaust gases form a mixture of substances in various states. Gases are dominant, but liquids and solids from incomplete combustion of fuel and engine oil are also present. Particulate matter (PM) emitted from diesel and gasoline engines is a mixture of soot and soluble organic fraction, which is composed of an aromatic fraction resulting from unburned hydrocarbons (benzene, toluene, styrene, xylene) from the paraffin acidic phase (cresol, benzoic acid) and the alkaline phase (pyridine, aniline). The remaining components adsorbed at the carbon core include inter alia water-soluble sulphates, nitrates, metals, and other carbon particulates. The concentrations, modal structures, and temporal patterns of urban particles are strongly influenced by traffic emissions, which are identified as the main source of particle number in urban environments [1].Polycyclic aromatic hydrocarbons (PAHs) are contaminants widespread in the environment, and vehicular emissions have long been recognized as the Pol. J. Environ. Stud. Vol. 26, No. 2 (2017), 801-807 AbstractPolycyclic aromatic hydrocarbons (PAHs) are contaminants widespread in the environment and vehicular emissions have long been recognized as the most important anthropogenic sources of PAHs in urban air Polycyclic aromatic hydrocarbons (PAHs) emitted in the exhaust gases of diesel and petrol engines using different fuels were quantified. Size fractionated chemical analysis of particles in vehicle emissions were carried out by sampling with an electrical low pressure multi-stage impactor ELPI. The mean concentrations of total PAHs adsorbed onto the particulate matter in the rage of 0.03-0.25 μm emitted from the exhaust gases were 48.3, 128.2 and 83.0 ng·m -3 , respectively from three kinds of diesel fuels. Results indicated that PAHs present in the last two fraction (0.17-0.25 μm) have the highest contribution in the total content of these compounds. In the collected fractions of particulate matter emitted in gasoline engine exhaust 12 compounds were identified in the 0.25 µm fraction and 9 PAHs in the 0.17 µm fraction.

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“…These included Surfers Paradise (commercial), Benowa (mixed commercial and residential), Nerang (industrial) and Clearview Estate (residential). As the research study only considered road dust in the urban environment, industrial, commercial and residential land use types were analysed due to their significant contribution to the PAHs load in road dust (Gunawardena et al, 2012). This is also supported by the fact that residential, commercial and industrial areas are the typical land use types in the urban environment.…”

Section: Study Sitesmentioning

confidence: 96%

Quantitative assessment of human health risk posed by polycyclic aromatic hydrocarbons in urban road dust

Liu

Egodawatta

et al. 2017

Science of The Total Environment

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Editor: Adrian CovaciAmong 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 (b150 μm) and coarse (N 150 μm) 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]

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

Cited by 97 publications

References 22 publications

Source identification of trace elements in the atmosphere during the second Asian Youth Games in Nanjing, China: Influence of control measures on air quality

Source identification of trace elements in the atmosphere during the second Asian Youth Games in Nanjing, China: Influence of control measures on air quality

Polycyclic Aromatic Hydrocarbons in the Particles Emitted from the Diesel and Gasoline Engines

Quantitative assessment of human health risk posed by polycyclic aromatic hydrocarbons in urban road dust

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