Experiments were conducted at a primary lead smelter to investigate the particle size distributions of lead-containing aerosol to which workers were exposed, using personal inhalable dust spectrometers (PIDS) in specific smelter process areas.
A total of 46 PIDS samples were evaluated, taken from the ore storage/mill, sinter plant, blast furnace and dross furnace process areas.
Continuous particle size distributions were derived from the raw PIDS data employing a recently-developed optimisation routine, enabling determination of the percentages of inhalable, thoracic and respirable aerosol (in terms of lead content) as fractions of total lead aerosol.
In addition, the mass ratios thoracic/inhalable and respirable/inhalable were also determined.
Although the parameters of the measured particle size distributions ranged widely, some clear trends emerged.
Firstly, the aerosols were coarser than had been expected based on measurements of previously reported workplace particle size distributions.
This is thought to be due to the fact that the PIDS collects larger particles more efficiently than other instruments which have been used for such measurements.
Secondly, there were significant differences in particle size distribution between process areas, in particular that the aerosol in the blast furnace area was generally finer than in the sinter plant. (...)
Mots-clés Pascal : Plomb, Métal lourd, Soudage, Industrie métallurgique, Exposition professionnelle, Médecine travail, Homme, Dimension particule, Aérosol, Lieu travail, Teneur air ambiant, Analyse quantitative, Analyse chimique, Toxicité, Appareil respiratoire pathologie
Mots-clés Pascal anglais : Lead, Heavy metal, Welding, Metallurgical industry, Occupational exposure, Occupational medicine, Human, Particle size, Aerosols, Work place, Ambient air concentration, Quantitative analysis, Chemical analysis, Toxicity, Respiratory disease
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0218035
Code Inist : 002B03L03. Création : 11/09/1998.