Tecnologías avanzadas de oxidación para eliminar disruptores endocrinos en agua utilizando catalizadores mesoporosos con zinc
Date
2018
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Abstract
En este trabajo se sintetizaron silicatos mesoporosos del tipo MCM-41 modificados con Zinc
mediante el método de impregnación húmeda con diferentes cargas del metal. El soporte y los
diferentes catalizadores obtenidos se caracterizaron mediante difracción de rayos X (DRX),
isotermas de adsorción-desorción de N2 a 77 K, y técnicas ICP-OES.
Estos materiales fueron evaluados como catalizadores heterogéneos en la reacción tipo foto Fenton, utilizando radiación UV-visible, temperatura ambiente y un pH cercano al neutro, para la
degradación de soluciones acuosas de diferentes Disruptores Endocrinos, como herbicidas
(atrazina), compuestos derivados de la industria del plástico (bisfenol A) y de la industria
farmacéutica (ácido clofíbrico).
Los resultados obtenidos mostraron que el catalizador Zn/MCM-41(5) exhibió la actividad más
alta. Por lo tanto, el buen rendimiento de este material indica que esta reacción tipo foto-Fenton
heterogénea aparece como un pre-tratamiento muy prometedor capaz de mejorar la
biodegradabilidad de aguas contaminadas con productos químicos biorrecalcitrantes, como lo son
la mayoría de los Disruptores Endocrinos.
Mesoporous silica material type MCM-41 was modified with different amounts of Zn (1 - 15 wt.%) by the wet impregnation method. Support and catalysts were characterized by means of powder X ray diffraction (XRD), N2 nitrogen adsorption–desorption and ICP-OES techniques. The Zn-modified mesoporous silicates have been successfully tested for the degradation in aqueous solutions of different endocrine-disrupting (EDs), such as herbicides (atrazine), compounds derived from the plastic industry (bisphenol A) and from the pharmaceutical industry (clofibric acid). The results showed that the Zn/MCM-41(5) catalyst exhibited the highest activity. The high performance of this material indicates that the heterogeneous photo-Fenton-like reaction appears as a very promising pre-treatment capable of enhancing the biodegradability of water contaminated with biorecalcitrant chemicals, as the most endocrine disruptors.
Mesoporous silica material type MCM-41 was modified with different amounts of Zn (1 - 15 wt.%) by the wet impregnation method. Support and catalysts were characterized by means of powder X ray diffraction (XRD), N2 nitrogen adsorption–desorption and ICP-OES techniques. The Zn-modified mesoporous silicates have been successfully tested for the degradation in aqueous solutions of different endocrine-disrupting (EDs), such as herbicides (atrazine), compounds derived from the plastic industry (bisphenol A) and from the pharmaceutical industry (clofibric acid). The results showed that the Zn/MCM-41(5) catalyst exhibited the highest activity. The high performance of this material indicates that the heterogeneous photo-Fenton-like reaction appears as a very promising pre-treatment capable of enhancing the biodegradability of water contaminated with biorecalcitrant chemicals, as the most endocrine disruptors.
Description
Keywords
MCM-41, Zn, Procesos avanzados de oxidación, Disruptores endócrinos
Citation
1° Congreso Latinoamericano y 3° Congreso de Ingeniería de Procesos y Productos
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