Occupational exposure to carbonyls and related health risk in a Formaldehyde manufacture plant
| Autor: | Chia-Yin Liu, 柳佳吟 |
|---|---|
| Rok vydání: | 2009 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 97 This study aims to investigate the characteristics of atmospheric carbonyl emitted during formaldehyde manufacturing and to evaluate the human health risk following occuptational exposures. A questionnaire survey was also conducted among workers to gather more health-related information. Results shows that the formaldehyde levels were higher in Formalin plant (FM) and Pentaerythritol plant (PE), whereas the acetaldehyde levels were higher in PE plant. The average air pollutant concentrations in the afternoon were usually higher than that in the morning. The formaldehyde concentrations during normal operation ranged from 0.001 to 0.698 ppm, which was less than that of the annual repair maintenance operation (0.008 to 0.942 ppm). However, in terms of the average exposure levels, the mean formaldehyde concentration in normal operation (0.217 ppm) was higher than that of the maintenance operation (0.108 ppm). Health risk assessment indicated that the mean lifetime cancer risk for most workers were higher than 1×10-5. Workers in FM and PE had a lifetime cancer risk exceeding 1×10−3. Estimated cancer risks show that atmospheric carbonyls in the formaldehyde manufacturing factory may cause health effects on worker; therefore, some actions should be taken to reduce human health risks. Results from questionnaire survey shows that the most dissatisfied event in the factory is poor air quality (55.1%), and the worst problems which have to be improved are the smell and noise problems. The obvious conscious symptoms related to formaldehyde exposure are fatigue, eyes streaming tears, dry and itching, stimulating and skin allergies. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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