Polycyclic aromatic hydrocarbon exposure in coal liquefaction workers : the value of urinary 1-hydroxypyrene excretion in the development of occupational hygiene control strategies.
Studies in coal liquefaction workers were conducted to examine relationships between work activities, exposure to polycyclic aromatic hydrocarbons (PAHs) and excretion of urinary 1-hydroxypyrene (1-OHP).
In a single-week study in operators, the end of work period 1-OHP excretion was an order of magnitude higher than in a shadow control subject, who experienced exposure by inhalation only (shadowed operator=15.8 mumol mol-1 creatinine ; shadow control=1.07 mumol mol-1 creatinine).
Dermal exposure was estimated to account for over 70% of excreted 1-OHP in exposed workers.
A second study over 4 consecutive weeks (multi-week study) showed consistency in 1-OHP excretion from week to week both in operators and laboratory technicians, indicating little variation in weekly exposures for these workers.
Excretion levels in maintenance workers however, showed some week to week variation, consistent with the variable nature of exposures associated with this type of work.
A further study involving an end of work period spot assessment for all personnel showed a clear distinction between exposed workers (operators and maintenance staff) and other workers not thought to be exposed (laboratory technicians and office staff).
Findings in the course of these studies indicated that there is no loss of 1-OHP at 4°C, compared with - 20°C. On the basis of work to data at the coal liquefaction facility, hygiene control strategies have been proposed involving periodic urinary 1-OHP monitoring.
Mots-clés Pascal : Composé aromatique polycyclique, Liquide dérivé charbon, Industrie pétrochimique, Exposition professionnelle, Homme, Surveillance biologique, Urine, Médecine travail, Poste travail, Marqueur biologique, Voie externe, Inhalation
Mots-clés Pascal anglais : Polycyclic aromatic compound, Coal liquids, Petrochemical industry, Occupational exposure, Human, Biological monitoring, Urine, Occupational medicine, Workplace layout, Biological marker, Topical administration, Inhalation
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 95-0427665
Code Inist : 002B03L06. Création : 01/03/1996.