Evaluation and occurrence of carcinogenic polycyclic aromatic hydrocarbons (PAHs) in animal feed factories.

摘要

Concentrations of 16 polycyclic aromatic hydrocarbons (US EPA priority pollutants PAH) were studied in sedimented dust (n=30) collected by an electric vacuum cleaner from 2 animal feed factories in the district of Hodonin in 1995 and 1996. Dust particles below 0.7 mm were analysed. Seven of the studied PAH are considered to be animal carcinogens (International Agency for Research on Cancer, 1983), namely benzo(a)anthracene (BaA), chrysene (Chry), benzo(b)fluoranthene(BbF), benzo(k)fluoranthene (BkF), benzo(a)pyrene (BaP), dibenzo(a,h)anthracene (DBahA) and indeno(1,2,3-cd)pyrene (IcdP). The average sum of 16 PAH for sedimented dust was 752μg/kg, the average sum of 7 carcinogenic PAH was 110μg/kg (14.6% of the total sum of 16 PAH), and average BaP concentration was 11μg/kg (10% of the total sum of 7 carcinogenic PAH). Of the carcinogenic PAH chrysene (35.5μg/kg), benzo(a)anthracene (20.6μg/kg) and benzo(b)fluoranthene are prevalent in dust deposits. Of the other studied PAH, phenanthrene (198.5μg/kg), anthracene (104.8μg/kg) and pyrene were dominant. Significantly higher levels of the following 5 carcinogenic PAH were found in animal feed factory K (n=15) compared with animal feed factory R (n=15): BaA (K 30.8μg/kg; R 10.3250L蘥/kg; P<0.01),Chry (K 50.2μg/kg; R 20.8μg/kg; P<0.01), BbF (K 27.3μg/kg; R 8.8μg/kg; P<0.05), BaP (K 15.6μg/kg; R 5.7μg/kg; P<0.05), and DBahA (K 5.8μg/kg; R 3.8μg/kg; P<0.05). In the other 11 studied PAH no significant difference was found between the two animal feed factories.