Catalytic Ozonation of Melanoidin in Aqueous Solution over CoFe2O4 Catalyst

Abstract

In this work, cobalt ferrite (CoFe 2 O 4) was synthesized by solvothermal route for application as a catalyst in the ozonation reaction for the decolorization and mineralization of melanoidin from aqueous solution. The structural properties of CoFe 2 O 4 sample were investigated by X-ray diffraction (XRD), nitrogen adsorption-desorption isotherms, Fourier-transform infrared spectroscopy (FTIR), particlesize distribution, scanning electron microscopy (SEM) and X-ray dispersive energy spectroscopy (EDS). Single-phase CoFe 2 O 4 particles with a predominantly mesoporous structure containing a high specific surface area were obtained. Results showed that the CoFe 2 O 4-catalyzed ozonation reaction has higher activity for the decolorization and mineralization of melanoidin when compared with the ozonation reaction without the presence of catalyst. Therefore, this material can be very promising for the application in catalytic ozonation systems for the melanoidin removal from liquid effluents.

Cucurbituril-Functionalized Nanocomposite as a Promising Industrial Adsorbent for Rapid Cationic Dye Removal

“…Intense diffraction peaks of CoFe 2 O 4 at 2θ = 18.0, 30.1, 35.4, 43.1, 53.4, 57.0, and 62.6° were ascribed to the reflection of 111, 220, 311, 400, 422, 511, and 440 planes of CoFe 2 O 4 , which were well-indexed to the cubic spinel structure (JCPDS card no. 22-1086) . Peaks at 2θ = 19.8, 26.6, 34.9, and 50.138° represent the characteristic peaks of MMT (JCPDS file no.…”

“…. 47 Peaks at 2θ = 19.8, 26.6, 34.9, and 50.138°represent the characteristic peaks of MMT (JCPDS file no. 29-1498) 48 (Figure S2B).…”

Ozonización catalítica en el tratamiento de Contaminantes de Preocupación Emergente en aguas residuales: Un análisis bibliométrico

“…631 de 2015 se observa que en Colombia no existen regulaciones en base a las concentraciones máximas permitidas de CECs en aguas residuales (80) , sin embargo, estos compuestos pueden ser candidatos a regulación futura, dependiendo de las investigaciones realizadas sobre sus efectos potenciales en la salud y los datos de monitoreo con respecto a su incidencia (81) . De igual manera, en Brasil también se identificaron estudios sobre OC heterogénea en donde se utilizó para tratar efluentes ricos en melanoidina (compuesto que se genera al someter determinados alimentos a altas temperaturas) y lixiviados de rellenos sanitarios municipales (82,83) , con resultados de remoción de color y COT del 98% y 80%, respectivamente.…”

Magnetic Nanoparticles for Photocatalytic Ozonation of Organic Pollutants

“…Recently, Hussan et al [19] verified a high catalytic activity, stability and reuse of BiFeO 3 magnetic nanoparticles during aniline degradation. CoFe 2 O 4 particles with a predominantly mesoporous structure containing a large surface area showed a higher decolourization and mineralization of melanoidin (aminocarbonyl complex polymers containing a dark brown colour present in several distillery wastewaters) during catalytic ozonation [20]. The improvement when compared to O 3 alone was attributed to the generation of HO • radicals in the reaction medium.…”