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Oxidative properties of ambient PM2.5 and elemental composition : heterogeneous associations in 19 European cities

Nawrot, T. S. and Künzli, N. and Sunyer, J. and Shi, T. M. and Moreno, T. and Viana, M. and Heinrich, J. and Forsberg, B. and Kelly, F. J. and Sughis, M. and Nemery, B. and Borm, P.. (2009) Oxidative properties of ambient PM2.5 and elemental composition : heterogeneous associations in 19 European cities. Atmospheric environment : air pollution ; emissions, transport and dispersion, transformation, deposition effects, micrometeorology, urban atmosphere, global atmosphere, Vol. 43, H. 30. pp. 4595-4602.

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Official URL: http://edoc.unibas.ch/dok/A5843282

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Abstract

We assessed the extent to which constituents of PM2.5 (transition metals, sodium, chloride) contribute to the ability to generate hydroxyl radicals ((OH)-O-center dot) in vitro in PM2.5 sampled at 20 locations in 19 European centres participating in the European Community Respiratory Health Survey. PM2.5 samples (n = 716) were collected on filters over one year and the oxidative activity of particle suspensions obtained from these filters was then assessed by measuring their ability to generate (OH)-O-center dot in the presence of hydrogen peroxide. Associations between (OH)-O-center dot formation and the studied PM constituents were heterogeneous. The total explained variance ranged from 85% in Norwich to only 6% in Albacete. Among the 20 centres, 15 showed positive correlations between one or more of the measured transition metals (copper, iron, manganese, lead, vanadium and titanium) and (OH)-O-center dot formation. In 9 of 20 centres (OH)-O-center dot formation was negatively associated with chloride, and in 3 centres with sodium. Across 19 European cities, elements explained the largest variations in (OH)-O-center dot formation were chloride, iron and sodium. (C) 2009 Elsevier Ltd. All rights reserved
Faculties and Departments:09 Associated Institutions > Swiss Tropical and Public Health Institute (Swiss TPH) > Department of Epidemiology and Public Health (EPH) > Chronic Disease Epidemiology > Air Pollution and Health (Künzli)
03 Faculty of Medicine > Departement Public Health > Sozial- und Präventivmedizin > Air Pollution and Health (Künzli)
UniBasel Contributors:Künzli, Nino
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Pergamon Press
ISSN:0004-6981
Note:Publication type according to Uni Basel Research Database: Journal article
Last Modified:24 May 2013 09:10
Deposited On:26 Apr 2013 06:52

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