OCCURRENCE OF CARCINOGENIC POLYCYCLIC ARO MATIC-HYDROCARBONS (PAH) ONPIG AND CATTLE FARMS

Concentrations of 16 polycyclic aromatic hydrocarbons (U.S. EPA priori ty pollutant PAHs) were studied in feedstuffs (n = 12), drinking water (n = 21), stable dust (n = 17), porcine liquid manure (n = 16), road dust (n = 14) and soil (n = 11) on three pig farms (D., M., T.) and tw o cattle farms (Na., Ne.) in Hodonin district in 1995 and 1996. Seven out of the studied PAHs are considered as animal carcinogens (Internat ional Agency for Research on Cancer, 1983), namely benzo(a)anthracene (BaA), chrysene (Chry), benzo(b)fluoranthene (BbF), benzo(k)fluoranthe ne (BkF), benzo(a)pyrene (BaP), dibenzo(a,h)anthracene (DBahA) and ind eno(1,2,3-cd)pyrene (IcdP). The average sum of 16 PAHs for feedstuffs was 207.7 mu g/kg, the average sum of seven carcinogenic PAHs made 7.4 mu g/kg and average BaP concentration was lower than 0.1 mu g/kg. Six teen PAH average sum for drinking water amounted to 51.6 ng/l, average sum of seven carcinogenic PAHs made 8,4 ng/l and average BaP concentr ation was 1.1 ng/l. The respective values for stable dust were 2 147.9 mu g/kg, 178.0 mu g/kg and 5.6 mu g/kg. The average sum of 16 PAHs fo r porcine liquid manure was 543.2 mu g/kg of dry matter, average sum o f seven carcinogenic PAHs amounted to 47.0 mu g/kg of dry matter and a verage BaP concentration made 2.3 mu g/kg of dry matter. Sixteen PAH a verage sum for road dust amounted to 13 142.7 mu g/kg, average sum of seven carcinogenic PAH was 4 597.2 mu g/kg and average BaP concentrati on made 384.0 mu g/kg. The respective values for soil were 3 542.8 mu g/kg, 1 767.1 mu g/kg and 187.1 mu g/kg. Chrysene, benzo(a)anthracene and benzo(b)fluoranthene are dominant PAH carcinogens in the stable en vironment and in the environment on pig and cattle farms. Among the ot her PAHs, phenanthrene, fluoranthene and pyrene are dominant. A perman ent goal of veterinary service is to seek additional sources and to re duce the penetration of carcinogenic PAHs into livestock herds. Data o n carcinogenic PAH concentrations in the stable environment on pig and cattle farms collected within a pilot study can also be used by medic al service (preventive and occupational medicine).