多溴二苯醚 （PBDEs）曾是最大宗使用的溴化阻燃劑（BFRs），它們被應用在相當廣泛的材料中。因為它們並未與高分子物質以化學之方式緊密結合，PBDE相當容易在製程、應用及拋棄的過程中進入大氣中。含有PBDEs之產品終將以都市垃圾焚化廠（MSWI）或金屬回收廠(Chen et al., 2006a)處置之。許多國家將此種以垃圾轉化為能量之焚化方式視為都市固體廢棄物處置之主流策略。本研究之目的為分析飛灰中芳香族之溴含量以探討BFRs對其減量以及再生成過程之衝擊。
飛灰中PBDEs含量在50oC 到 1000oC皆十分相似，但在1000oC則開始改變。飛灰中PBDEs含量自1100oC 到 1350oC十分不穩定，原因為再生成機制（de novo synthesis）。最高PBDE濃度發生在1200oC，含量為33137 皮克/克。在飛灰未沖洗前及1450oC之條件下，總PBDE含量1797 皮克/克中，超過485皮克/克為BDE #47，為最主要之PBDE同源異構物；次之為BDE #209 及 BDE #183。在飛灰沖洗後及1450oC之條件下，總PBDE含量394.3 皮克/克中，超過297皮克/克為BDE #209，為最主要之PBDE同源異構物；次之為BDE #49 及 BDE #206。 總PBDE之比例對於PBDE之生成機制具有重要之意義

Polybrominated diphenyl ethers (PBDEs) were the most abundant original BFRs found, that have allowed them to be used, successfully, as flame retardants in a wide range of materials. Since they are not chemically incorporated with polymers, PBDEs are easily exposed to the atmosphere during their production, used, and disposed. Products containing PBDEs will sooner or later be treated by municipal solid waste incinerators (MSWIs) or metal recycling plants (Chen et al., 2006a). Many countries consider waste-to-energy incineration as a mainstream strategy for municipal solid waste management. The aim of this study is analyze persistent aromatic bromine from fly ashes to explore the impact of brominated flame retardants (BFR) on their reduction and reformation. This study analyze about reduction and reformation of PBDEs for non-washing and washing ashes during heating process. The applying temperature is from 50 oC to 1450 oC.
PBDEs content from fly ash remain similar from 50 oC to 1000 oC, but it change after 1000 oC. PBDEs content from fly ash, has unstable concentration from 1100 oC to 1350 oC and it is caused by de novo synthesis. Highest value occur at temperature 1200oC and it is about 33137 pg/g. Responsible for more than 485 pg/g of total PBDEs content (1797 pg/g), BDE #47 was the most predominant PBDE congener, followed by BDE #209 and BDE #183, in the fly ash before washing and temperature 1450 oC. Responsible for more than 297 pg/g of total PBDEs content (394.3 pg/g), BDE #209 was the most predominant PBDE congener, followed by BDE #49 and BDE #206, in the fly ash after washing and temperature 1450 oC. The total ratio of PBDEs has important implications regarding the formation mechanisms of PBDEs.

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