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- W3149832105 abstract "Nano-zerovalent iron( nZVI) approach is effective in the debromination of polybrominated biphenyl ethers( PBDEs). The kinetics and degradation pathway are the key issues to understand the PBDEs degradation mechanisms. In this study,nZVI, synthesized through liquid phase reduction method,coupled with Triton X-100,could completely debrominate the highly brominated congeners of a commercial octa-BDEs mixture within 46 h. The debromination of octa-BDEs could be described by means of pseudofirst-order kinetics with the reaction constant( k) of 0. 106 h-1. In case of lacking the PBDE standards,an effective approach has been developed to determine the unknown PBDE congeners using the quantitative-structure retention relationship( QSRR) model. The retention time of all 39 PBDE congeners in a standard mixture was firstly analyzed with gas chromatography coupled with an electron capture detector( GC-ECD),and the relative retention time( RRT) for each standard was obtained after normalizing the RT by the average RT of BDE47 and BDE183. Then a QSRR model was developed by fitting the RRT of each PBDE congener and its specific RRT index. The debromination products of octa-BDEs were identified using this QSRR model and the degradation pathway of octaBDEs was elucidated. The results showed that in the stepwise reductive debromination process of PBDEs by nZVI,meta-debromin was facile to be degraded." @default.
- W3149832105 created "2021-04-13" @default.
- W3149832105 creator A5042834540 @default.
- W3149832105 date "2014-01-01" @default.
- W3149832105 modified "2023-09-24" @default.
- W3149832105 title "Reductive Debromination of Polybrominated Diphenyl Ethers in Aquifier by Nano Zero-valent Iron: Debromination Kinetics and Pathway" @default.
- W3149832105 hasPublicationYear "2014" @default.
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