BECAS
LOFFREDO Camila Macarena
artículos
Título:
Fe-Mn/ZrO2 catalysts: Sulfate-based-advanced oxidation process for the degradation of olive oil industry model pollutants
Autor/es:
LOFFREDO, CAMILA M.; DENNEHY, MARIANA; ALVAREZ, MARIANA
Revista:
CATALYSIS COMMUNICATIONS
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2022
ISSN:
1566-7367
Resumen:
Fe, Mn and a bimetallic Fe-Mn catalysts supported on ZrO2 were synthesized and testedfor the activation of persulfate (PS) and peroxymonosulfate (PMS) in the degradationreaction of three different organic compounds: cinnamic acid (CA), benzoic acid (BA),and catechol (C). The catalysts were prepared and tested in order to evaluate the effectof the metal and the metal combination on the generation of reactive oxygen species(ROS). The characterization of the catalysts was carried out by X-ray diffraction(XRD), X-ray photoelectron spectroscopy (XPS), and atomic absorption spectroscopy(AAS)The best degradation results were obtained when PMS was activated with the bimetallicFe-Mn/ZrO2 catalyst in the CA degradation. Moreover, the Fe-Mn/ZrO2 catalystreusability was tested for up to three consecutive cycles of reaction, with mineralizationlevels > 90%.A synergistic effect between the Fe and Mn metal species, which increases the catalystactivity if compared to the monometallic catalysts, is postulated. Both sulfate andhydroxyl radicals were generated in the PMS activation process. The activationmechanisms of the oxidants were proposed.