Aplicación del proceso foto-Fenton heterogéneo a la degradación de herbicidas en fase acuosa con catalizadores nano-estructurados
Date
2016
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Abstract
En este trabajo se sintetizaron silicatos mesoporosos del tipo MCM-41 modificados con hierro mediante el
método de impregnación húmeda con diferentes cargas del metal. Las diferentes meso-estructuras
obtenidas se caracterizaron mediante DRX, UVvis-RD, ICP y XPS y se estudió su comportamiento como
catalizadores heterogéneos en la reacción foto-Fenton. Así, estos materiales mesoporosos estructurados
modificados con hierro fueron probados con éxito en la reacción de degradación de atrazina en agua con el
proceso foto-Fenton heterogéneo, utilizando radiación UV-visible, temperatura ambiente y un pH cercano
al neutro. Los resultados obtenidos revelaron que el catalizador Fe/MCM-41(2,5) exhibió una gran
actividad. Por lo tanto, el alto rendimiento de este material indica que el proceso foto-Fenton heterogéneo
también se puede emplear eficazmente para tratar aguas residuales que contienen atrazina, con las
ventajas que esto implica, en contraste con un proceso homogéneo.
n this work, MCM-41 materials have been synthesized and modified with iron by the wet impregnation method with different metal loadings. The different meso-structures obtained were characterized by XDR, UVVIS-RD, ICP and XPS and their behavior as heterogeneous catalysts in the photo-Fenton reaction was studied. Thus, iron-containing mesostructured materials have been successfully tested for the heterogeneous photo-Fenton degradation of atrazine aqueous solutions using UV-visible irradiation at room temperature and close to neutral pH. The results showed that the Fe/MCM-41(2.5) catalyst exhibited the highest activity. Thus, the high performance of this material indicates that the heterogeneous via of photo-Fenton process can also be efficiently employed to treat wastewaters containing atrazine, with the advantages that this implies in contrast to a homogeneous process
n this work, MCM-41 materials have been synthesized and modified with iron by the wet impregnation method with different metal loadings. The different meso-structures obtained were characterized by XDR, UVVIS-RD, ICP and XPS and their behavior as heterogeneous catalysts in the photo-Fenton reaction was studied. Thus, iron-containing mesostructured materials have been successfully tested for the heterogeneous photo-Fenton degradation of atrazine aqueous solutions using UV-visible irradiation at room temperature and close to neutral pH. The results showed that the Fe/MCM-41(2.5) catalyst exhibited the highest activity. Thus, the high performance of this material indicates that the heterogeneous via of photo-Fenton process can also be efficiently employed to treat wastewaters containing atrazine, with the advantages that this implies in contrast to a homogeneous process
Description
Keywords
Procesos avanzados de oxidación, Fotorreactores, Materiales mesoporosos, MCM-41, Atrazina
Citation
XXVI Congreso Iberoamericano de Catálisis (2016).
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