Thermal degradation of polybrominated diphenyl ethers over as-prepared Fe3O4 micro/nano-material and hypothesized mechanism
文献类型：期刊论文
| 作者 | Li, Qianqian; Yang, Fan; Su, Guijin; Huang, Linyan; Lu, Huijie; Zhao, Yuyang; Zheng, Minghui |
| 刊名 | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
 |
| 出版日期 | 2016-01 |
| 卷号 | 23期号:2页码:1540-1551 |
| 关键词 | Polybrominated diphenyl ether Fe3O4 micro/nano-material Hydrodebromination products Degradation pathway Steric effect Thermodynamics |
| 英文摘要 | The thermal degradation of decabromodiphenyl ether (BDE-209) featuring fully substituted bromines was investigated over an as-prepared Fe3O4 micro/nano-material at 300 A degrees C. Degradation followed pseudo-first-order kinetics with k (obs) = 0.15 min(-1) higher than that for decachlorobiphenyl (CB-209). Twenty-six newly produced polybrominated diphenyl ether (PBDE) congeners were identified using the available PBDE standards, while four PBDE congener products were predicted using third-order polynomial regression equation. Analysis of the products indicated that BDE-209 underwent stepwise hydrodebromination over as-prepared Fe3O4. Similar to the case for CB-209, two initial hydrodebromination steps are favored at the BDE-209 meta-positions, giving the major products BDE-207 and BDE-197. However, the variance about the preferred products began to emerge from the start of heptabromodiphenyl ethers (hepta-BDEs). The majorly produced hepta-BDE isomer with BDE-183 is unbrominated at one ortho-position. However, this is different from the reported degradation of CB-209, which always produced the products chlorinated at all four ortho-positions until the ortho-position had to be removed for the formation of trichlorobiphenyls and dichlorobiphenyl still majorly chlorinated at three or two ortho-positions. The early BDE-209 hydrodebromination steps appear to be strongly influenced by steric effects, whereas subsequent hydrodebromination steps, as more bromine atoms are removed, will be gradually governed more by thermodynamics. |
| 收录类别 | SCI |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/35966]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Li, Qianqian,Yang, Fan,Su, Guijin,et al. Thermal degradation of polybrominated diphenyl ethers over as-prepared Fe3O4 micro/nano-material and hypothesized mechanism[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2016,23(2):1540-1551. |
| APA | Li, Qianqian.,Yang, Fan.,Su, Guijin.,Huang, Linyan.,Lu, Huijie.,...&Zheng, Minghui.(2016).Thermal degradation of polybrominated diphenyl ethers over as-prepared Fe3O4 micro/nano-material and hypothesized mechanism.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,23(2),1540-1551. |
| MLA | Li, Qianqian,et al."Thermal degradation of polybrominated diphenyl ethers over as-prepared Fe3O4 micro/nano-material and hypothesized mechanism".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 23.2(2016):1540-1551. |
入库方式： OAI收割
来源：生态环境研究中心
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