Abstract
Silicon carbide is produced in Acheson ovens by heating a mixture of petroleum coke and silica sand at a temperature of 2000°C. A total of 38 personal and stationary samples were taken in the working atmosphere in two plants to determine the concentrations of 20 unsubstituted PAHs by gas chromatography-mass spectrometry. These included benzo(a)anthracene, chrysene, benzo(a)pyrene, benzo(j+b+k)fluoranthene, dibenzo(ah)anthracene and indeno(1.2.3-cd)pyrene, all of which are carcinogenic. In plant A, the total PAH concentrations in the personal samples varied from 0.28 to 2.67 μg m−3 (mean value 1.13 μg m−3)with a mean BaP concentrations of 0.05 μg m−3 for all worksites. In plant B, the total PAH varied from 2.93 to 50.03 μg m−3 (mean value 10.50 μg m with a mean BaP concentration of 0.13 μg m−3. The differences in job-specific PAH exposure in both plants could be explained by different working conditions. Compared to the exposure to carcinogenic PAHs in coke and aluminium plants, the measured concentrations in both silicon carbide plants were low.
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