Objectives This study evaluates personal exposure to respirable inorganic and organic fibers during normal human lifetimes and assesses the order of magnitude of the contribution of inorganic fibers other than asbestos to total fiber exposure from man-made and natural sources.
Methods Four groups (suburban schoolchildren, rural retired persons, office workers, and taxi drivers), with five persons per group, were monitored for 24 h four times during one year.
Personal sampling pumps collected airborne dust on gold-precoated Nuclepore filters.
The fibers were analyzed for fiber sizes specified by the World Health Organization Results The geometric mean concentrations ranged from 9000 fibers. m-3 (office workers) to 20 000 fibers. m-3 (schoolchildren) for organic fibers, and from 600 fibers. m-3 (taxi drivers) to 4000 fibers m-3 (schoolchildren) for gypsum fibers.
For other inorganic fibers the concentrations were around 5000 fibers. m-3.
The contribution of fibers with an elemental composition similar to that of man-made vitreous fibers (MMVF) was less than about one-quarter of the content of other inorganic fibers.
The fiber size distributions were uniform across the groups, and the organic fibers were the longest and thinnest nonasbestos fibers.
Conclusions Lifetime exposure to fibers can be ranked as organic fibers>other inorganic fibers>fibers with an elemental composition similar to MMVF>MMVF. (...)
Mots-clés Pascal : Teneur air ambiant, Contrôle, Analyse chimique, Fibre, Fibre minérale, Fibre naturelle, Pollution air, Appareil portatif, Santé et environnement, Epidémiologie, Homme, Etude comparative, Europe, Zone urbaine, Zone rurale
Mots-clés Pascal anglais : Ambient air concentration, Check, Chemical analysis, Fiber, Mineral fiber, Natural fiber, Air pollution, Portable equipment, Health and environment, Epidemiology, Human, Comparative study, Europe, Urban area, Rural area
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 96-0438358
Code Inist : 002B30A02A. Création : 10/04/1997.