| Summary: | 碩士 === 國立成功大學 === 環境醫學研究所 === 93 === The aim of the study is to investigate the characteristics, health risk, the relationship between personal exposures and biological monitoring results for electric arc furnaces workers associated with polycyclic aromatic hydrocarbons (PAHs) exposures.
We conducted size-segregating, and personal respiratory and dermal sampling on all selected workers whom were further divided into 5 categories of the pour on mold, shipment, ladle, metalluray, maintenance. In addition, biological monitoring was also conducted to investigate the relationship between personal exposure levels and biological monitoring results.
Results show that total-PAHs exposure levels for the five SEGs were: 24335, 39732, 131215, 27314 and 27953 ng/m3 respectively. The high exposure groups were those associated with electric arc furnaces works, which included the ladle. All personal exposures were mainly contributed by gaseous PAHs, which were dominated by the low molecular weight PAHs containing two to three aromatic rings. The estimated lung cancer and skin cancer risks for all investigated SEGs fell to the range 1.83×10-3-8.29×10-3, and 3.57×10-4-6.31×10-4, respectively, indicating that the preventing strategy should be focused on inhalatory exposures, rather than on the dermal exposures. By conducting multivariate linear regression analyses, this study found that worker’s smoking habit, age and sex were not significant, but through the combination of both personal respiratory and dermal exposures would be able to explain the 87.7% variations of workers’ urinary 1-hydroxypyrene (1-OHP).
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