Particle-bound benzene from diesel engine exhaust.
Objectives The large surface area of the carbon core of diesel exhaust particles may contribute to the adsorption or condensation of such volatile carcinogenic organic compounds as benzene.
The attention of this study focused on determining the distribution of benzene between the gas and particulate phases in the breathing zone of bus garage workers.
Methods Benzene and suspended particulate matter were evaluated jointly in the air of a municipal bus garage.
Personal passive monitors were used for benzene sampling in the breathing zone of the workers.
Active samplers were used for sampling diesel exhaust particles and the benzene associated with them.
The benzene levels were measured by gas chromatography.
Results Diesel engine exhaust from buses was the main source of air pollution caused by benzene and particles in this study.
The concentration of benzene in the gas and particulate phases showed a wide range of variation, depending on the distance of the workplace from the operating diesel engine.
Benzene present in the breathing zone of the workers was distributed between the gas and particulate phases.
The amounts of benzene associated with particles were significantly lower in summer than in winter.
Conclusions The particulate matter of diesel exhaust contains benzene in amounts comparable to the concentrations of carcinogenic polycyclic aromatic hydrocarbons (PAH) and the usually found nitro-PAH. (...)
Mots-clés Pascal : Exposition professionnelle, Médecine travail, Particule fine, Benzène, Adsorption, Dépôt autobus, Homme, Teneur air ambiant, Carburant diesel, Inhalation, Lieu travail
Mots-clés Pascal anglais : Occupational exposure, Occupational medicine, Fine particle, Benzene, Adsorption, Bus garage, Human, Ambient air concentration, Diesel fuel, Inhalation, Work place
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0108070
Code Inist : 002B03L02. Création : 16/11/1999.