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|Title: ||Oxidative properties of ambient PM2.5 and elemental composition: Heterogeneous associations in 19 European cities|
|Authors: ||NAWROT, Tim|
Kelly, Frank J.
|Issue Date: ||2009|
|Publisher: ||PERGAMON-ELSEVIER SCIENCE LTD|
|Citation: ||ATMOSPHERIC ENVIRONMENT, 43(30). p. 4595-4602|
|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.|
|Notes: ||[Nawrot, Tim S.] Hasselt Univ, Ctr Environm Sci, Diepenbeek, Belgium. [Nawrot, Tim S.; Sughis, Muhammad; Nemery, Benoit] Katholieke Univ Leuven, Leuven, Belgium. [Kuenzli, Nino; Sunyer, Jordi] IMIM Hosp Mar, Municipal Inst Med Res, CIBERESP, Ctr Res Environm Epidemiol, Barcelona, Spain. [Kuenzli, Nino] Catalan Inst Res & Adv Studies ICREA, Barcelona, Spain. [Sunyer, Jordi] Univ Pompeu Fabra, Barcelona, Spain. [Shi, Tingming; Borm, Paul] Univ Dusseldorf, Inst Umweltmed Forsch, Dusseldorf, Germany. [Moreno, Teresa; Viana, Mar] IDAEA CSIC, Inst Environm Assessment & Water Res, Barcelona, Spain. [Heinrich, Joachim] Natl Res Ctr Environm Hlth, Inst Epidemiol, Helmholtz Zentrum Muenchen, Munich, Germany. [Forsberg, Bertil] Umea Univ, Dept Publ Hlth & Clin Med, Umea, Sweden. [Kelly, Frank J.] Kings Coll London, MRC HPA Ctr Environm & Hlth, London WC2R 2LS, England. [Borm, Paul] Zuyd Univ, Ctr Expertise Life Sci, Heerlen, Netherlands.|
|ISI #: ||000270319400009|
|Type: ||Journal Contribution|
|Validation: ||ecoom, 2010|
|Appears in Collections: ||Research publications|
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