Mechanochemical transformation of an organic ligand on mineral surfaces: The efficiency of birnessite in catechol degradation (Articolo in rivista)

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  • Mechanochemical transformation of an organic ligand on mineral surfaces: The efficiency of birnessite in catechol degradation (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.jhazmat.2011.11.054 (literal)
Alternative label
  • Di Leo P., Pizzigallo MDR., Ancona V., Di Benedetto F., Mesto E., Schingaro E., Ventruti G. (2012)
    Mechanochemical transformation of an organic ligand on mineral surfaces: The efficiency of birnessite in catechol degradation
    in Journal of hazardous materials (Print); Elsevier, Amsterdam (Paesi Bassi)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Di Leo P., Pizzigallo MDR., Ancona V., Di Benedetto F., Mesto E., Schingaro E., Ventruti G. (literal)
Pagina inizio
  • 148 (literal)
Pagina fine
  • 154 (literal)
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  • 201 (literal)
Rivista
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  • 7 (literal)
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR-IMAA, Consiglio Nazionale delle Ricerche - Istituto di Metodologie per l'Analisi Ambientale, C.da S. Loja, Zona Industriale, 85050 Tito Scalo (PZ), Italy. Dipartimento di Biologia e Chimica Agroforestale e Ambientale, Università di Bari Aldo Moro, Via Amendola 165/a, 70126 Bari, Italy. Consiglio Nazionale delle Ricerche - Istituto di Ricerca sulle Acque, Via F. De Blasio 5, 70132 Bari, Italy. Dipartimento di Chimica, Università di Firenze, Via della Lastruccia, 3, 50019 Sesto Fiorentino, Italy. Dipartimento di Scienze della Terra e Geoambientali, Università di Bari Aldo Moro, Via Orabona, 4, 70125 Bari, Italy. (literal)
Titolo
  • Mechanochemical transformation of an organic ligand on mineral surfaces: The efficiency of birnessite in catechol degradation (literal)
Abstract
  • The aim of this work is to investigate the efficiency of the phyllomanganate birnessite in degrading catechol after mechanochemical treatments. A synthesized birnessite and the organic molecule were grounded together in a high energy mill and the xenobiotic-mineral surface reactions induced by the grinding treatment have been investigated by means of X-ray powder diffraction, X-ray fluorescence, thermal analysis and spectroscopic techniques as well as high-performance liquid chromatography and voltammetric techniques.If compared to the simple contact between the birnessite and the organic molecule, mechanochemical treatments have revealed to be highly efficient in degrading catechol molecules, in terms both of time and extent. Due to the two phenolic groups of catechol and the small steric hindrance of the molecule, the extent of the mechanochemically induced degradation of catechol onto birnessite surfaces is quite high. The degradation mechanism mainly occurs via a redox reaction. It implies the formation of a surface bidentate inner-sphere complex between the phenolic group of the organic molecules and the Mn(IV) from the birnessite structure. Structural changes occur on the MnO 6 layers of birnessite as due to the mechanically induced surface reactions: reduction of Mn(IV), consequent formation of Mn(III) and new vacancies, and free Mn 2+ ions production. (literal)
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