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Título del libro: Water-Rock Interaction - Proceedings Of The 13th International Conference On Water-Rock Interaction, Wri-13
Título del capítulo: Interactions between four polycyclic aromatic hydrocarbons (PAHs) and the birnessite surface

Autores UNAM:
MARIO VILLALOBOS PEÑALOSA; RICHARD WILLIAM GIBSON; NORMA RUTH LOPEZ SANTIAGO;
Autores externos:

Idioma:
Inglés
Año de publicación:
2010
Palabras clave:

9 ,10-anthraquinone; Aqueous media; Birnessite; Fluoranthene; Fluorenes; Layered manganese oxide; Mn oxides; Natural organic matters; Oxidation mechanisms; Oxide surface; Polycyclic aromatic hydrocarbons(PAHs); Reaction pathways; Surface interactions; Anthracene; Fluorine containing polymers; Hexane; Ketones; Manganese; Oxides; Manganese oxide


Resumen:

The surface interaction of four polycyclic aromatic hydrocarbons (PAHs) with two layered manganese oxides, acid birnessite and d-MnO 2, was investigated for the first time. Experiments were carried out both in hexane and in aqueous media. Fluorene and anthracene were oxidized by both Mn oxides, giving rise to 9-fluorenone and 9,10-anthraquinone, respectively; while phenanthrene and fluoranthene remained untransformed. However, d-MnO 2 was capable of adsorbing the two latter PAHs, while acid birnessite was not, apparently due to the considerably larger specific surface area of the former (114 vs. 39 m 2/g). The oxidation mechanism was found to take place, at least partly, through oxidation by the Mn(IV) oxide surfaces. The results presented suggests possible mineral surface-driven reaction pathways that may dictate PAH's fate when released to the environment, if layered manganese oxides are present and natural organic matter is low or absent. © 2010 Taylor & Francis Group, London.


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