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Modifying bentonite with Al-Fe from concentrated clay suspensions
Modificación de bentonita con Al-Fe a partir de suspensiones concentradas de arcilla
DOI:
https://doi.org/10.15446/ing.investig.v25n1.14623Keywords:
modifying bentonite, catalyser, phenol oxidation, clay (en)modificación de bentonita, catalizador, oxidación de fenol y arcilla (es)
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This article reports modifying a Colombian bentonite with an Al-Fe mixture from 10% and 50% p/p clay suspensions as well as dry material, using water or acetone as dispersal phase. The solids thus obtained were characterized using atomic absorption, residual cationic interchange ability and x-ray diffraction. Catalytic activity was evaluated regarding phenol oxidation reaction with hydrogen peroxide in diluted aqueous medium. The results indicated that solids prepared in concentrated suspension presented structural, textural and catalytic properties comparable with modified solids in diluted suspension (2% weight).
Se reporta la modificación de una bentonita colombiana con la especie mixta de Al-Fe partiendo de suspensiones de arcilla al 10 y 50% p/p, así como del material en seco, empleando como fase dispersante agua o acetona. Los sólidos obtenidos se caracterizaron con las técnicas de absorción atómica, capacidad de intercambio catiónico residual y difracción de rayos X. Se evaluó la actividad catalítica frente a la reacción de oxidación de fenol con peróxido de hidrógeno en medio acuoso diluido. Los resultados indican que los sólidos preparados en suspensión concentrada presentan propiedades estructurales, texturales y catalíticas comparables con los sólidos modificados en suspensión diluida (2% p/p).
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Copyright (c) 2005 Sonia Moreno, Rafael Molina, Yesid Hernández
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