Diseño, síntesis y caracterización de sílicas mesoporosas nanoestructuradas a partir de moldeantes renovables para su aplicación en la degradación de glifosato
Date
2021
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Abstract
En este trabajo se diseñaron, síntetizaron y caracterizaron sílicas mesoporosas nanoestructuradas a partir de
agentes moldeantes renovables (monoestearato de glicerilo y glicerol) para desarrollar catalizadores
heterogéneos, a fin de evaluarlos en la reacción de degradación/fragmentación de glifosato bajo condiciones
de reacción extremadamente suaves: presión atmosférica y temperatura ambiente. Estos materiales se
desarrollaron mediante el método de impregnación húmeda con diferentes contenidos de hierro (2,5; 5; 10 y
20% p/p) y por incorporación directa del metal con relación molar Si/Fe=20. Los catalizadores se
caracterizaron por DRX, Isotermas de adsorción y desorción de N2, UVvis-DR e ICP. Los catalizadores fueron
evaluados mediante oxidación húmeda catalítica con aire, logrando niveles de degradación del herbicida del
orden del 70%. De esta manera se pretende aportar sustentabilidad a la industria química, a partir del empleo
de glicerol residual y/o monoestearato de glicerilo para la síntesis del soporte catalítico mesoporosos
presentando una interesante tecnología con menor impacto ambiental para la remediación de aguas
contaminadas con glifosato.
In this work nanostructured mesoporous silicas from renewable molding agents (glyceryl monostearate and glycerol) were successfully designed, synthesized and characterized to develop heterogeneous catalysts, in order to evaluate them in the degradation/fragmentation reaction of glyphosate under extremely mild reaction conditions: atmospheric pressure and room temperature. These materials were developed by wet impregnation method with different iron contents (2.5; 5; 10 and 20% w/w) and by direct incorporation of the metal (molar ratio Si/Fe=20). The catalysts were characterized by XRD, N2 adsorption and desorption isotherms, UVvis DR and ICP. The catalysts were evaluated by catalytic wet oxidation with air, achieving herbicide degradation levels of about 70%. In this way, it is intended to add sustainability to the chemical industry from the use of residual glycerol and/or glyceryl monostearate in the synthesis of the mesoporous catalytic supports, for its application in an lower environmental impact technology for the remediation of water contaminated with glyphosate.
In this work nanostructured mesoporous silicas from renewable molding agents (glyceryl monostearate and glycerol) were successfully designed, synthesized and characterized to develop heterogeneous catalysts, in order to evaluate them in the degradation/fragmentation reaction of glyphosate under extremely mild reaction conditions: atmospheric pressure and room temperature. These materials were developed by wet impregnation method with different iron contents (2.5; 5; 10 and 20% w/w) and by direct incorporation of the metal (molar ratio Si/Fe=20). The catalysts were characterized by XRD, N2 adsorption and desorption isotherms, UVvis DR and ICP. The catalysts were evaluated by catalytic wet oxidation with air, achieving herbicide degradation levels of about 70%. In this way, it is intended to add sustainability to the chemical industry from the use of residual glycerol and/or glyceryl monostearate in the synthesis of the mesoporous catalytic supports, for its application in an lower environmental impact technology for the remediation of water contaminated with glyphosate.
Description
Keywords
Porógenos renovables, Sílicas mesoporosas, Degradación glifosato
Citation
VIII Congreso Internacional (2021). XVII Congreso Mexicano de Catálisis (2021).
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