کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4440754 1311075 2009 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Oxidative properties of ambient PM2.5 and elemental composition: Heterogeneous associations in 19 European cities
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علم هواشناسی
پیش نمایش صفحه اول مقاله
Oxidative properties of ambient PM2.5 and elemental composition: Heterogeneous associations in 19 European cities
چکیده انگلیسی

We assessed the extent to which constituents of PM2.5 (transition metals, sodium, chloride) contribute to the ability to generate hydroxyl radicals (OH) 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 in the presence of hydrogen peroxide. Associations between OH 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 formation. In 9 of 20 centres OH formation was negatively associated with chloride, and in 3 centres with sodium. Across 19 European cities, elements which explained the largest variations in OH formation were chloride, iron and sodium.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Environment - Volume 43, Issue 30, September 2009, Pages 4595–4602
نویسندگان
, , , , , , , , , , , ,