The Degradation of Decabromodiphenyl Ether in the Supercritical Fluid

Sheng Nai Qi; Wen Sheng Linghu; Chun Yan Sun

doi:10.4028/www.scientific.net/AMR.798-799.134

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 798-799The Degradation of Decabromodiphenyl Ether in the...

The Degradation of Decabromodiphenyl Ether in the Supercritical Fluid

Abstract:

Currently, environmental contamination by polybrominated diphenyl ethers (PBDEs) in the world is of important concern and requires the effective remediation technologies. The degradation of decabromodiphenyl ether (BDE-209) in the supercritical n-hexane by zerovalent iron was studied in this work. The results showed that BDE-209 can be rapidly reduced into nona-, octa-, hepta-and lower brominated polybrominated diphenyl ethers (PBDEs) under the supercritical reaction conditions. Among n-hexane, methanol, tetrahydrofuran and mixed n-hexane+ tetrahydrofuran solvents, the conversion of BDE-209 in tetrahydrofuran was the highest. BDE-209 conversion increased with increased reaction temperature and pressure. Under the reaction condition: temperature: 523K; pressure: 3.2Mpa; reaction time: 10min; reaction system: 200ml 50mg BDE-209/L n-hexane; atmosphere: N₂ and catalyst load: 2g/L, the conversion of BDE-209 was as high as 88.9%.

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Periodical:

Advanced Materials Research (Volumes 798-799)

Pages:

134-137

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.798-799.134

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Online since:

September 2013

Authors:

Sheng Nai Qi, Wen Sheng Linghu, Chun Yan Sun

Keywords:

BDE-209, Debromination, Polybrominated Diphenyl Ether (PBDE), Supercritical Fluids

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