As a part of the FLAME research project funded by the EU COPERNICUS programme (1994-1996) samples of surface sediments were taken from 31 man-made lakes and one natural lake in the Czech Republic.
The sites differ considerably in their altitude, area, catchment, depth, retention time, trophic status, and in parameters of local air pollution.
The samples were analysed for concentration of spheroidal carbonaceous particles (SCP, numbers per gram dry mass of sediment), a characteristic component of industrial fly-ash.
The extracted carbonaceous particles were allocated according to the fuel-types combusted throughout Europe (coal, oil, brown coal, peat, oil shale) using particle chemistries derived by energy dispersive spectroscopy (EDS).
Trace metals were also analysed in the surface sediments as were mosses sampled at the study sites.
The main objectives of the study were (i) to look for factors determining SCP concentrations in surface sediments of lakes, with special emphasis on the distribution of large fossil-fuel combustion sources (ii) to compare fuel-type allocation of carbonaceous particles with combustion of these fuels within the country, (iii) to look for trends in spatial distribution of trace metals and (iv) to characterize the impact of airborne particles from these sources on environmental and human health.
The SCP concentrations show little or no relation to air-pollution parameters on a small scale, although some large-scale effects are evident. (...)
Mots-clés Pascal : République tchèque, Europe, Pollution air, Combustion, Combustible fossile, Cendre volante, Devenir polluant, Retombée atmosphérique, Analyse chimique, Sédiment lacustre, Bassin versant, Variation spatiale, Topographie, Phénomène transport, Inventaire source pollution, Impact environnement, Métal lourd, Teneur, Elément trace
Mots-clés Pascal anglais : Czech Republic, Europe, Air pollution, Combustion, Fossil fuel, Fly ash, Pollutant behavior, Atmospheric fallout, Chemical analysis, Lake sediments, Watershed, Spatial variation, Topography, Transport process, Pollution source inventory, Environment impact, Heavy metal, Content, Trace element
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0442359
Code Inist : 001D16C02. Création : 25/01/1999.