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Debromination of tetrabromobisphenol a by nanoscale zerovalent Iron / Kunde Lin in Industrial & engineering chemistry research, Vol. 51 N° 25 (Juin 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 25 (Juin 2012) . - pp. 8378-8385 Titre : Debromination of tetrabromobisphenol a by nanoscale zerovalent Iron : Kinetics, influencing factors, and pathways Type de document : texte imprimé Auteurs : Kunde Lin, Auteur ; Jiafeng Ding, Auteur ; Xinwen Huang, Auteur Année de publication : 2012 Article en page(s) : pp. 8378-8385 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Kinetics  Zerovalent  metal  Debromination Résumé : Tetrabromobisphenol A (TBBPA) is one of the most widely used brominated flame retardants and is ubiquitously present in the environment. In this study, we investigated the debromination of TBBPA by nanoscale zerovalent iron (nZVI) in methanol/water (50/50) solutions- Zerovalent iron nanoparticles demonstrated an excellent capacity to debrominate TBBPA to tribromobisphenol A, dibromobisphenol A, bromobisphenol A, and bisphenol A. More than 86% of TBBPA was debrominated within 16 h in a pH 7.5 reaction solution initially containing 3.0 g/L of nZVI. Debromination of TBBPA was apparently accompanied by the release of bromine ions and the elevation of solution pH. The debromination kinetics could be well-described by a three-parameter pseudo-first-order decay model. A higher loading of nZVI and acidic conditions facilitated the debromination process, while coexisting Ca2+ and Na+ species inhibited the reaction. On the basis of identified reaction intermediates and products, TBBPA debromination pathways by nZVI were proposed. This study suggests that nZVI may be potentially employed to debrominate TBBPA in soil and sediment. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26066765 [article] Debromination of tetrabromobisphenol a by nanoscale zerovalent Iron : Kinetics, influencing factors, and pathways [texte imprimé] / Kunde Lin, Auteur ; Jiafeng Ding, Auteur ; Xinwen Huang, Auteur . - 2012 . - pp. 8378-8385. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 25 (Juin 2012) . - pp. 8378-8385 Mots-clés : Kinetics  Zerovalent  metal  Debromination Résumé : Tetrabromobisphenol A (TBBPA) is one of the most widely used brominated flame retardants and is ubiquitously present in the environment. In this study, we investigated the debromination of TBBPA by nanoscale zerovalent iron (nZVI) in methanol/water (50/50) solutions- Zerovalent iron nanoparticles demonstrated an excellent capacity to debrominate TBBPA to tribromobisphenol A, dibromobisphenol A, bromobisphenol A, and bisphenol A. More than 86% of TBBPA was debrominated within 16 h in a pH 7.5 reaction solution initially containing 3.0 g/L of nZVI. Debromination of TBBPA was apparently accompanied by the release of bromine ions and the elevation of solution pH. The debromination kinetics could be well-described by a three-parameter pseudo-first-order decay model. A higher loading of nZVI and acidic conditions facilitated the debromination process, while coexisting Ca2+ and Na+ species inhibited the reaction. On the basis of identified reaction intermediates and products, TBBPA debromination pathways by nZVI were proposed. This study suggests that nZVI may be potentially employed to debrominate TBBPA in soil and sediment. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26066765