Objectives-To evaluate the efficiency of different automotive cabin air filters to prevent penetration of components of diesel exhaust and thereby reduce biomedical effects in human subjects.
Filtered air and unfiltered diluted diesel exhaust (DDE) were used as negative and positive controls, respectively, and were compared with exposure to DDE filtered with four different filter systems.
Methods-32 Healthy non-smoking subjects (age 21-53) participated in the study.
Each subject was exposed six times for 1 hour in a specially designed exposure chamber : once to air, once to unfiltered DDE, and once to DDE filtered with the four different cabin air filters.
Particle concentrations during exposure to unfiltered DDE were kept at 300 mug/m3.
Two of the filters were particle filters.
The other two were particle filters combined with active charcoal filters that might reduce certain gaseous components.
Subjective symptoms were recorded and nasal airway lavage (NAL), acoustic rhinometry, and lung function measurements were performed.
The two particle filters decreased the concentrations of diesel exhaust particles by about half, but did not reduce the intensity of symptoms induced by exhaust.
The combination of active charcoal filters and a particle filter significantly reduced the symptoms and discomfort caused by the diesel exhaust. (...)
Mots-clés Pascal : Exposition, Environnement, Carburant diesel, Gaz échappement, Filtre air, Evaluation performance, Toxicité, Homme, Individu sain, Teneur air ambiant, Pollution air, Prévention
Mots-clés Pascal anglais : Exposure, Environment, Diesel fuel, Exhaust gas, Air filter, Performance evaluation, Toxicity, Human, Healthy subject, Ambient air concentration, Air pollution, Prevention
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0186097
Code Inist : 002B03L02. Création : 16/11/1999.