Oxidative degradation of MTBE by pyrite - activated persulfate / Chenju Liang in Industrial & engineering chemistry research, Vol. 49 N° 18 (Septembre 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 18 (Septembre 2010) . - pp. 8858–8864 Titre : Oxidative degradation of MTBE by pyrite - activated persulfate : proposed reaction pathways Type de document : texte imprimé Auteurs : Chenju Liang, Auteur ; Yi-Yu Guo, Auteur ; Yi-Chi Chien, Auteur Année de publication : 2010 Article en page(s) : pp. 8858–8864 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Oxidative degradation Résumé : This bench-scale study investigated the feasibility of activated persulfate (S2O82−) oxidation of methyl tert-butyl ether (MTBE), using pyrite (FeS2) as the source of ferrous ion activators. Under the FeS2-activated S2O82− condition, the sulfate free radical (SO4−•) is the predominant reactive species generated. The oxidation reactions were able to completely degrade MTBE when given sufficient doses of FeS2 and S2O82− and sufficient reaction time (e.g., 3 g FeS2/L and 5 g Na2S2O8/L within 4 h) and exhibited generation and subsequent degradation of the primary MTBE degradation intermediate products including tert-butyl formate, tert-butyl alcohol, methyl acetate, and acetone. The detailed reaction mechanism proposed for a SO4−•-driven oxidation process in this paper indicates that the destruction of MTBE most likely happens through α-hydrogen abstraction via attack of the SO4−• at the intermediate methoxy group. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100740d [article] Oxidative degradation of MTBE by pyrite - activated persulfate : proposed reaction pathways [texte imprimé] / Chenju Liang, Auteur ; Yi-Yu Guo, Auteur ; Yi-Chi Chien, Auteur . - 2010 . - pp. 8858–8864. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 18 (Septembre 2010) . - pp. 8858–8864 Mots-clés : Oxidative degradation Résumé : This bench-scale study investigated the feasibility of activated persulfate (S2O82−) oxidation of methyl tert-butyl ether (MTBE), using pyrite (FeS2) as the source of ferrous ion activators. Under the FeS2-activated S2O82− condition, the sulfate free radical (SO4−•) is the predominant reactive species generated. The oxidation reactions were able to completely degrade MTBE when given sufficient doses of FeS2 and S2O82− and sufficient reaction time (e.g., 3 g FeS2/L and 5 g Na2S2O8/L within 4 h) and exhibited generation and subsequent degradation of the primary MTBE degradation intermediate products including tert-butyl formate, tert-butyl alcohol, methyl acetate, and acetone. The detailed reaction mechanism proposed for a SO4−•-driven oxidation process in this paper indicates that the destruction of MTBE most likely happens through α-hydrogen abstraction via attack of the SO4−• at the intermediate methoxy group. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100740d

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