Artículo
Metal modified silica for catalytic wet air oxidation (CWAO) of glyphosate under atmospheric conditions
Vaschetto, Eliana Gabriela
; Sicardi Alercia, Melina Inés; Elías, Verónica Rita
; Ferrero, Gabriel Orlando
; Carraro, Paola María
; Casuscelli, Sandra Graciela
; Eimer, Griselda Alejandra
Fecha de publicación:
08/10/2019
Editorial:
Springer
Revista:
Adsorption
ISSN:
0929-5607
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
SBA type nano-structured catalysts were prepared modified with iron and cobalt. The materials were characterized by XRD, N2 adsorption; TEM, ICP–OES, UV–Vis DRS and FTIR. These solids were evaluated in the glyphosate degradation reaction through catalytic wet air oxidation at atmospheric pressure and room temperature. The reaction products were analyzed by ionic chromatography and they included: acetate, nitrate, nitrite and phosphate ions. The catalyst stability and possibility of recycling were also study. It was found that the Fe and Co ions can form complexes with glyphosate, although only the Fe-SBA(20) catalyst led to the oxidative fragmentation of the herbicide. The Co-SBA(20) material acts as herbicide adsorbent but was not active to achieve its degradation. It is proposed that, the catalyst modified with iron can form a Fe-glyphosate complex which was observed by infrared spectroscopy. This complex was capable to active O2 from an air flow, generating oxoiron intermediates that promote the degradation of the herbicide (into short chain ions, less toxic and more biodegradable) under room reaction conditions.
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Identificadores
Colecciones
Articulos(CITEQ)
Articulos de CENTRO DE INVESTIGACION Y TECNOLOGIA QUIMICA
Articulos de CENTRO DE INVESTIGACION Y TECNOLOGIA QUIMICA
Citación
Vaschetto, Eliana Gabriela; Sicardi Alercia, Melina Inés; Elías, Verónica Rita; Ferrero, Gabriel Orlando; Carraro, Paola María; et al.; Metal modified silica for catalytic wet air oxidation (CWAO) of glyphosate under atmospheric conditions; Springer; Adsorption; 25; 7; 8-10-2019; 1299-1306
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