Chlorinated byproducts from the fenton-like oxidation of polychlorinated phenols / Macarena Munoz in Industrial & engineering chemistry research, Vol. 51 N° 40 (Octobre 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 40 (Octobre 2012) . - pp. 13092–13099 Titre : Chlorinated byproducts from the fenton-like oxidation of polychlorinated phenols Type de document : texte imprimé Auteurs : Macarena Munoz, Auteur ; Zahara M. De Pedro, Auteur ; Gema Pliego, Auteur Année de publication : 2012 Article en page(s) : pp. 13092–13099 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Oxidation Phenols Résumé : Fenton-like oxidation has proved to be highly efficient in the degradation of polychlorinated phenols (poly-CPs) at 50 °C provided that the H2O2 dose is adjusted appropriately. Using the theoretical stoichiometric H2O2/poly-CP molar ratio allowed a high mineralization of the starting poly-CPs, with negligible residual concentrations of chlorinated organic species and a dramatic reduction of ecotoxicity. Nevertheless, at substoichiometric H2O2 doses, a wide variety of chlorinated condensation byproducts (chlorinated diphenyl ethers, biphenyls, and dibenzofurans) were detected. A chlorinated aromatic iron-containing solid polymer was also formed. At these substoichiometric H2O2 doses, the ecotoxicity values even increased with respect to those of the starting poly-CPs. A reaction scheme is proposed to describe the Fenton-like oxidation of poly-CPs that includes all of the intermediates detected under substoichiometric conditions and used to develop a kinetic model based on TOC lumps. This kinetic model describes fairly well the time evolution of TOC upon the Fenton-like oxidation of poly-CPs. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3013105 [article] Chlorinated byproducts from the fenton-like oxidation of polychlorinated phenols [texte imprimé] / Macarena Munoz, Auteur ; Zahara M. De Pedro, Auteur ; Gema Pliego, Auteur . - 2012 . - pp. 13092–13099. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 40 (Octobre 2012) . - pp. 13092–13099 Mots-clés : Oxidation Phenols Résumé : Fenton-like oxidation has proved to be highly efficient in the degradation of polychlorinated phenols (poly-CPs) at 50 °C provided that the H2O2 dose is adjusted appropriately. Using the theoretical stoichiometric H2O2/poly-CP molar ratio allowed a high mineralization of the starting poly-CPs, with negligible residual concentrations of chlorinated organic species and a dramatic reduction of ecotoxicity. Nevertheless, at substoichiometric H2O2 doses, a wide variety of chlorinated condensation byproducts (chlorinated diphenyl ethers, biphenyls, and dibenzofurans) were detected. A chlorinated aromatic iron-containing solid polymer was also formed. At these substoichiometric H2O2 doses, the ecotoxicity values even increased with respect to those of the starting poly-CPs. A reaction scheme is proposed to describe the Fenton-like oxidation of poly-CPs that includes all of the intermediates detected under substoichiometric conditions and used to develop a kinetic model based on TOC lumps. This kinetic model describes fairly well the time evolution of TOC upon the Fenton-like oxidation of poly-CPs. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3013105

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