Tratamiento de Aguas Residuales Contaminadas con Glifosato basado en el desarrollo de SBA-15 impregnados con Fe como catalizadores avanzados para el proceso de oxidación húmeda en condiciones ambientales.
DOI:
https://doi.org/10.33414/rtyc.42.55-67.2021Palabras clave:
Tratamiento de aguas contaminadas, Glifosato, Nanomateriales, Contenido de FeResumen
Se desarrollaron sólidos nanoestructurados impregnados con diferentes contenidos de hierro (1; 2,5; 5 y 10% p/p) como catalizadores eficaces para degradar soluciones acuosas de glifosato en condiciones de reacción extremadamente suaves: presión atmosférica y temperatura ambiente. Estos materiales se caracterizaron por XRD, fisisorción de N2, UVvis-DR y XPS. Se obtuvieron estructuras mesoporosas regulares típicas de los sólidos SBA-15 y se pudo ajustar la especiación de Fe variando la carga nominal del metal. Los catalizadores fueron evaluados en la reacción de degradación-fragmentación de glifosato mediante oxidación húmeda catalítica con aire, logrando niveles de degradación del herbicida del orden del 80%. Se propuso un camino de reacción basado en la formación de un intermediario oxo-hierro (V) altamente reactivo a partir del complejo Fe-glifosato. De esta manera, se presenta una interesante tecnología con menor impacto ambiental y mayor sustentabilidad para la remediación de aguas contaminadas con glifosato.
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Derechos de autor 2021 Eliana Gabriela Vaschetto, Candelaria Gómez, Pablo Ochoa Rodríguez, Sandra Casuscelli, Verónica Elías, Griselda Eimer
Esta obra está bajo una licencia internacional Creative Commons Atribución-NoComercial 4.0.
