For centuries the city of Falun in central Sweden has been an important industrial region of copper mining, producing sulphuric acid and paint pigment.
The mining and chemical industries have generated vast amounts of wastes which have been deposited around the areas.
A large part of the city is now built on the wastes.
In the last two decades, significant amounts of work on the waste management have been conducted.
Previous investigations showed that the soils of the urban areas have been contaminated by the wastes with a rather high level of lead (Pb).
What is the speciation of soil-Pb ?
How does the Pb reach the biosphere ?
This paper gives answers toward these environmental problems.
This study investigates the distribution of Pb in the urban soils by means of chemical and mineralogical methods the quantity and quality of the fallout particles ; and traces the potential sources of contamination.
The data indicate that in Falun urban soil-Pb speciation, may mainly be associated with some mineral phases, e.g. Fe and Mn oxides, sulphides, Pb-carbonates, as well as retained by organic matters and clay minerals.
The concentrations of water soluble Pb are very low.
Because of the properties of the Pb-bearing phases, the high concentrations of soil-Pb in the urban area are not likely to have a significant affect on the blood-Pb levels of pre-school children living in the urban areas. (...)
Mots-clés Pascal : Suède, Europe, Pollution sol, Zone urbaine, Métal lourd, Plomb, Inventaire source pollution, Industrie extractive, Industrie chimique, Action vent, Devenir polluant, Interaction sol, Spéciation, Impact environnement, Biodisponibilité
Mots-clés Pascal anglais : Sweden, Europe, Soil pollution, Urban area, Heavy metal, Lead, Pollution source inventory, Mining industry, Chemical industry, Wind effect, Pollutant behavior, Soil interaction, Speciation, Environment impact, Bioavailability
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0129704
Code Inist : 001D16D03. Création : 22/06/1998.