Measurements of atmospheric concentrations of particulate trace elements Ag, Al, As, Br, Cd, Ce, Cl, Cr, Fe, Hg, Na, Ni, Pb, Sc, Se, Sm, V and Zn have been made since the early 1970s at seven urban sites across the U.S. Urban concentrations of atmospheric trace elements were found to be typically between 3 and 10 times higher than those at two rural sites and were broadly comparable with other urban data from Europe and North America, with the exception of one urban site in Walsall which was located near to a smelter.
Elements were shown to vary spatially within urban areas.
Both crustal and combustion related elements showed significant differences but the exposure to vehicle emissions, in terms of Pb and Br, was the dominant factor in differences between sites in the same urban area.
Mots-clés Pascal : Pollution air, Elément trace, Teneur, Contrôle, Zone urbaine, Royaume Uni, Europe, Variation spatiale, Variation saisonnière, Source pollution, Devenir polluant, Exposition professionnelle, Concentration maximale admissible, Guide technique
Mots-clés Pascal anglais : Air pollution, Trace element, Content, Check, Urban area, United Kingdom, Europe, Spatial variation, Seasonal variation, Pollution source, Pollutant behavior, Occupational exposure, Maximum permissible concentration, Technical handbook
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 94-0647496
Code Inist : 001D16C04D. Création : 09/06/1995.