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Article: Improved debromination of polybrominated diphenyl ethers by bimetallic iron-silver nanoparticles coupled with microwave energy

TitleImproved debromination of polybrominated diphenyl ethers by bimetallic iron-silver nanoparticles coupled with microwave energy
Authors
KeywordsBimetallic Iron-Silver
Debromination
Microwave Energy
Nano Technologies
Pbdes
Zero Valent Iron
Issue Date2012
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/scitotenv
Citation
Science Of The Total Environment, 2012, v. 429, p. 300-308 How to Cite?
AbstractThis study focused on the enhanced debromination of decabromodiphenyl ether (BDE-209) and 2,2',4,4'-tetrabromodiphenyl ether (BDE-47) by Fe-Ag nano-particles under microwave radiation (Fe-Ag/MW). Fe-Ag bimetallic nano-particles were synthesized by reductive deposition of Ag on nano-iron and characterized with a number of techniques, including BET, XRD, TEM and XPS. Approximately 97% of BDE-209 or 78% of BDE-47 were rapidly transformed to its degradation products within 8. min in the Fe-Ag/MW system. The dehalogenation efficiency of polybrominated diphenyl ethers (PBDEs) was enhanced apparently by microwave radiation. Moreover, the microwave thermal energy played a significant role in accelerating the degradation reactions. Compared with nano-iron alone, the deposition of Ag also increased the rates of degradation. GC-MS and LC-MS/MS analyses of PBDEs' degradation products reveals that the possible degradation pathway proceeds through stepwise debromination from [. n]-bromo- to [. n-1]-bromo-DE, with bromine being substituted by hydrogen sequentially. Di- to nona-brominated congeners were formed during BDE-209 reduction, while diphenyl ether to tri-BDEs were observed during BDE-47 degradation. These results suggest that PBDEs can be debrominated rapidly by the innovative processes that may be environmentally friendly in applications. © 2012 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/179280
ISSN
2015 Impact Factor: 3.976
2015 SCImago Journal Rankings: 1.702
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLuo, Sen_US
dc.contributor.authorYang, Sen_US
dc.contributor.authorSun, Cen_US
dc.contributor.authorGu, JDen_US
dc.date.accessioned2012-12-19T09:53:41Z-
dc.date.available2012-12-19T09:53:41Z-
dc.date.issued2012en_US
dc.identifier.citationScience Of The Total Environment, 2012, v. 429, p. 300-308en_US
dc.identifier.issn0048-9697en_US
dc.identifier.urihttp://hdl.handle.net/10722/179280-
dc.description.abstractThis study focused on the enhanced debromination of decabromodiphenyl ether (BDE-209) and 2,2',4,4'-tetrabromodiphenyl ether (BDE-47) by Fe-Ag nano-particles under microwave radiation (Fe-Ag/MW). Fe-Ag bimetallic nano-particles were synthesized by reductive deposition of Ag on nano-iron and characterized with a number of techniques, including BET, XRD, TEM and XPS. Approximately 97% of BDE-209 or 78% of BDE-47 were rapidly transformed to its degradation products within 8. min in the Fe-Ag/MW system. The dehalogenation efficiency of polybrominated diphenyl ethers (PBDEs) was enhanced apparently by microwave radiation. Moreover, the microwave thermal energy played a significant role in accelerating the degradation reactions. Compared with nano-iron alone, the deposition of Ag also increased the rates of degradation. GC-MS and LC-MS/MS analyses of PBDEs' degradation products reveals that the possible degradation pathway proceeds through stepwise debromination from [. n]-bromo- to [. n-1]-bromo-DE, with bromine being substituted by hydrogen sequentially. Di- to nona-brominated congeners were formed during BDE-209 reduction, while diphenyl ether to tri-BDEs were observed during BDE-47 degradation. These results suggest that PBDEs can be debrominated rapidly by the innovative processes that may be environmentally friendly in applications. © 2012 Elsevier B.V.en_US
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/scitotenven_US
dc.relation.ispartofScience of the Total Environmenten_US
dc.subjectBimetallic Iron-Silveren_US
dc.subjectDebrominationen_US
dc.subjectMicrowave Energyen_US
dc.subjectNano Technologiesen_US
dc.subjectPbdesen_US
dc.subjectZero Valent Ironen_US
dc.titleImproved debromination of polybrominated diphenyl ethers by bimetallic iron-silver nanoparticles coupled with microwave energyen_US
dc.typeArticleen_US
dc.identifier.emailGu, JD: jdgu@hkucc.hku.hken_US
dc.identifier.authorityGu, JD=rp00701en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.scitotenv.2012.04.051en_US
dc.identifier.pmid22595555-
dc.identifier.scopuseid_2-s2.0-84862252378en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84862252378&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume429en_US
dc.identifier.spage300en_US
dc.identifier.epage308en_US
dc.identifier.isiWOS:000307085100026-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridLuo, S=24399484000en_US
dc.identifier.scopusauthoridYang, S=12143579000en_US
dc.identifier.scopusauthoridSun, C=7404247694en_US
dc.identifier.scopusauthoridGu, JD=7403129601en_US

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