PAH exposure and biological exposure monitoring of workers in traditional foundry industry

• Main Authors: Tsang-Ta Chao, 趙倉達
• Other Authors: Hsiu-Ling Chen
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/23509189508114496509

碩士 === 弘光科技大學 === 職業安全與防災研究所 === 98 === Abstract The assessment of ambient air Polycyclic Aromatic Hydrocarbons (PAHs) concentrations in workplace and urine 1-hydroxypyrene (1-OHP) concentrations of two foundry industries were completed in this study to evaluate the relationship between workers PAHs exposure and biological exposure monitoring. Meanwhile, health risk assessment of PAHs for the foundry worker was also completed in this study. The gas-phase PAH was the major contributor (over 90%) for total PAHs. Meanwhile, the cancer risk for PAHs exposure ranged from 1.60×10-4 – 1.71×10-4 and the contributions of gas phase cancer risk were higher than particle-phase. Meanwhile, the toxic equivalent level of PAHs were high in painting area (152.3 ng/m3),melting area (96.9 ng/m3) and pouring area (37.1 ng/m3), the workers in these working departments should be taken more seriously attention. Biological monitoring of foundry workers showed that lifestyle might affect 1-OHP levels, such as smoking, drinking, chewing betel nuts and exercise habits. While considering the working departments, the highest 1-OHP levels were found in melting area (0.47 μg/g creatinine), pouring area (0.47μg/g creatinine) and molding area (0.42 μg/g creatinine). The results indicate that the workers in manufacturing area might have higher PAH exposure. After integrated the air PAH exposure level, working history and protective equipments usage of individual workers to an exposure index, the significant correlation was found between exposure index and urine 1-OHP. The results indicated that the foundry workers actually exposed to PAH exposure and the distribution of gas and particle phase PAHs provided to consider how to use the protective respiratory device for foundry workers.