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Chemosphere

Title:		"Concentrations, sources and human health risk of inhalation exposure to air toxics in Edmonton, Canada"
Author(s):		Bari MA; Kindzierski WB;
Address:		"School of Public Health, University of Alberta, 3-57 South Academic Building, 11405-87 Avenue, Edmonton, Alberta, T6G 1C9 Canada. Electronic address: mdaynul@ualberta.ca. School of Public Health, University of Alberta, 3-57 South Academic Building, 11405-87 Avenue, Edmonton, Alberta, T6G 1C9 Canada"
Journal Title:		Chemosphere
Year:		2017
Volume:		20170107
Issue:
Page Number:		160 - 171
DOI:		10.1016/j.chemosphere.2016.12.157
ISSN/ISBN:		1879-1298 (Electronic) 0045-6535 (Linking)
Abstract:		"With concern about levels of air pollutants in recent years in the Capital Region of Alberta, an investigation of ambient concentrations, sources and potential human health risk of hazardous air pollutants (HAPs) or air toxics was undertaken in the City of Edmonton over a 5-year period (2009-2013). Mean concentrations of individual HAPs in ambient air including volatile organic compounds (VOCs), polycyclic aromatic hydrocarbons (PAHs) and trace metals ranged from 0.04 to 1.73 mug/m(3), 0.01-0.54 ng/m(3), and 0.05-3.58 ng/m(3), respectively. Concentrations of benzene, naphthalene, benzo(a)pyrene (BaP), arsenic, manganese and nickel were far below respective annual Alberta Ambient Air Quality Objectives. Carcinogenic and non-carcinogenic risk of air toxics were also compared with risk levels recommended by regulatory agencies. Positive matrix factorization identified six air toxics sources with traffic as the dominant contributor to total HAPs (4.33 mug/m(3), 42%), followed by background/secondary organic aerosol (SOA) (1.92 mug/m(3), 25%), fossil fuel combustion (0.92 mug/m(3), 11%). On high particulate air pollution event days, local traffic was identified as the major contributor to total HAPs compared to background/SOA and fossil fuel combustion. Carcinogenic risk values of traffic, background/SOA and metals industry emissions were above the USEPA acceptable level (1 x 10(-6)), but below a tolerable risk (1 x 10(-4)) and Alberta benchmark (1 x 10(-5)). These findings offer useful preliminary information about current ambient air toxics levels, dominant sources and their potential risk to public health; and this information can support policy makers in the development of appropriate control strategies if required"
Keywords:		Aerosols/*administration & dosage/adverse effects Air Pollutants/*analysis Alberta Canada Carcinogens/*administration & dosage Environmental Monitoring/*methods Humans Industry Inhalation Exposure/*adverse effects Particulate Matter/*adverse effects Polyc;
Notes:		"MedlineBari, Md Aynul Kindzierski, Warren B eng England 2017/01/23 Chemosphere. 2017 Apr; 173:160-171. doi: 10.1016/j.chemosphere.2016.12.157. Epub 2017 Jan 7"