Lead concentrations and isotope ratios in street dust determined by electrothermal atomic absorption spectrometry and inductively coupled plasma mass spectrometry.
Nordic Symposium on Trace Elements in Human Health and Disease. Roskilde, DNK, 1997/06/29.
A major source of environmental lead, particularly in urban areas, has been from the combustion of leaded petrol.
Street dust has previously been used to assess urban lead contamination, and the dust itself can also be a potential source of lead ingestion, particularly to children.
The progressive reduction of lead in petrol, in recent years, would be expected to have been reflected in a reduction of lead in urban dust.
We have tested this hypothesis by repeating an earlier survey of Manchester street dust and carrying out a comparable survey in Paris.
Samples were collected from streets and parks, lead was extracted by digestion with concentrated nitric acid and determined by electrothermal atomic absorption spectrometry.
Lead isotope ratios were measured by inductively coupled plasma mass spectrometry.
Results for Manchester show that lead concentrations have fallen by about 40% (street dust averages, 941 mug/g (ppm) in 1975 down to 569 ppm in 1997).
In Paris, the lead levels in street dust are much higher and significant differences were observed between types of street (not seen in Manchester).
Additionally, lead levels in parks were much lower than in Manchester.
Samples collected under the Eiffel Tower had very high concentrations and lead isotope ratios showed that this was unlikely to be fallout from motor vehicles but could be due to the paint used on the tower. (...)
Mots-clés Pascal : Paris, Ile de France, France, Europe, Royaume Uni, Zone urbaine, Pollution air, Poussière, Métal lourd, Plomb, Inventaire source pollution, Echantillonnage, Analyse chimique, Teneur, Composition isotopique, Méthode couplée, Spectrométrie ICP, Spectrométrie masse, Spectrométrie absorption atomique, Atomisation thermoélectrique, Trafic routier, Véhicule à moteur
Mots-clés Pascal anglais : Paris, Ile-de-France, France, Europe, United Kingdom, Urban area, Air pollution, Dust, Heavy metal, Lead, Pollution source inventory, Sampling, Chemical analysis, Content, Isotopic composition, Coupled method, Inductive coupling plasma spectrometry, Mass spectrometry, Atomic absorption spectrometry, Thermoelectric atomization, Road traffic, Motor vehicle
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0249780
Code Inist : 001D16C04C. Création : 11/09/1998.