Study the Fate and Behavior of PBDD/Fs and PCDD/Fs Emission to Environment

• Main Authors: Ching-Lung Tien, 田清龍
• Other Authors: Chieh Lin
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/91120286143744808188

碩士 === 國立屏東科技大學 === 環境工程與科學系所 === 98 === Bromine (Br) and Chlorine (Cl) were belong to same group (ⅦA) in Chemical Periodical Table. Brominated flame retardants (BFRs) contained in plastics and electronic devices might cause Bromine to replace Chlorine linking position and produced PBDD/Fs. In this study, we investigated the site measured values of outstanding toxic equivalent (TEQ) of congeners of PCDD/Fs and PBDD/Fs from incinerator flue gases as to make comparisons of these characteristics. We also used the measured values of PBDD/Fs to compare the characteristics in different ambient air. This research utilized Fugacity model Level III to evaluate the fate of PBDD/Fs and made a comparison between the results of simulation and measured dataset. The results of this research were as followings: the total measured concentration of PCDD/Fs ranged from 0.17 to 3.78 ng/Nm3 and of PBDD/Fs ranged from 2.34 to 18.81 pg/Nm3 that emitted from incinerator flue gas. The major dominant species of PCDD/Fs and PBDD/Fs were 1,2,3,4/6,7,8-HxC(B)DD、2,3,7,8-TeC(B)DF、1,2,3,7,8-PeC(B)DF and 2,3,4,7,8-PeC(B)DF. The total concentration of PBDD/Fs in different ambient area was between 17.70~45.93 fg/Nm³ and the percentage of polybrominated dibenzofurans were higher than polybrominated dibenzo-p-dioxins. The simulated ambient concentration of PBDD/Fs which emitted from incinerator flue gas ranged from 13.69 to 59.95 fg/Nm³. The major predominant species were 1,2,3,4/6,7,8-HxBDD、2,3,7,8-TeBDF、1,2,3,7,8-PeBDF and 2,3,4,7,8-PeBDF. The simulated soil concentration of PBDD/Fs which emitted from incinerator flue gas ranged from 0.024938 to 0.111960 pg/Nm³, i.e. 89.0%~97.7% of the total concentration, showed that PBDD/Fs was similar to PCDD/Fs and the major fate was to accumulate in soil.