| Summary: | 碩士 === 國立高雄大學 === 土木與環境工程學系碩士班 === 99 === According to the air quality monitor of the Environmental Protection Agency in Taiwan, the ratio of unsatisfactory air quality days to the total number of monitored days in Kaohsiung has been by far the highest in Taiwan.Meanwhile, the number of night markets has increased dramatically and attracted more and more visitors in recent years. The large number of air pollutants are emitted from the crowded night market, which including the human body emission, and the variety of air pollutants produced from the human activities or cooking.
The objective of this study focus on the health risk assessment of occupational exposure to polycyclic aromatic hydrocarbons in night market workers with gasous phase pollutants(CO, CO2, PAHs), and PAHs, water soluble ions, metals adsorbed on the surface of PM2.5 which were generated by four-type stalls with different cooking ways. Based on the open hours of night market, the sampling time was 8 hours, and calculated the cancer risk on the night market workers. The results show that the deep-frying stall has the highest cancer risk, 3.74×10-4, and the cancer risk of stir-frying, barbecue, and boiling stalls are 3.43×10-4, 3.05×10-4, 1.75×10-4, respectively. The average cancer risk in four stalls are over the recommended acceptable limit standard(1×10-6) and the risk of occupational exposure standard(1×10-6~1×10-4).
In the analysis of concentration, barbecue stall has the highest concentration of carbon monoxide, 4.01 ppm, and stir-frying stall has the highest concentration of carbon dioxide, 742 ppm. In PM2.5 8 hours accumulated concentration, rangs from 104.94 to 214.81 μg/m3. And the average concentrations of PAHs in particle-phase and gaseous-phase are 2.088 to 3.619 μg/m3 and 3.791 to 7.877 μg/m3, respectively. The average concentration of water soluble ions ranges from 0.384 to 150.16 μg/m3.
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