Characteristics of polybrominated diphenyl ethers in the air of southern Taiwan
| Autor: | Shih-Hsiung Lin, 林世雄 |
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| Rok vydání: | 2011 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 99 Polybrominated diphenyl ethers (PBDEs) are well known hazardous air pollutants (HAPs) and are widely used brominated flame retardants (BFRs) because of their inhibitory effects on the ignition of combustible organic materials. Owing to their adverse health effects and increasing level in the air, their distribution in the air is of great concern to the publics. In this study, four sampling sites situated in industrialized area, metropolitan area as well as rural area which located in southern Taiwan were taken and analyzed for PBDEs. Four samples were taken for each sampling sites, and each sample was taken for a consecutive seven days with a mean sampling size of 4072, 4029, and 3567 Nm3 at the industrialized, metropolitan, and rural sites, respectively. For the industrialized area, the concentrations of PBDEs were in the range of 53.5 to 107 pg/Nm3, with an average of 67.3 pg/Nm3. For the metropolitan area, the concentrations of PBDEs were in the range of 83.5 to 115 pg/Nm3, with an average of 102 pg/Nm3. As for the rural area, the concentrations of PBDEs were in the range of 45.5 to 98.6 pg/Nm3, with an average of 71.7 pg/Nm3. The highest level was found in the metropolitan area. In addition, the particulate phase concentrations accounted for 64%, 68% and 55% in the industrialized, metropolitan, and rural area, respectively. The congener profiles of the various bromine substituted congeners showed that BDE #209 (10Br) is the dominant congener. For the industrialized area, BDE #209 accounted for 63.4% to 82.4% with an average of 73.6%. For the metropolitan area, BDE #209 accounted for 68.4% to 84.7%, with an average of 76.4%. As for the rural area, BDE #209 accounted for 64.4% to 81.0%, with an average of 74.2%. The results of this study provide important information for the promotion of air quality. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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