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Iron oxide nanoparticles embedded in organic microparticles from Yerba Mate useful for remediation of textile wastewater through a photo-Fenton treatment: Ilex paraguariensis as a platform of environmental interest - Part 1.
Monje, Dany Santiago; Ruiz, Orlando Simón; Valencia, Gloria Cristina; Mercado, D Fabio.
Afiliação
  • Monje DS; Grupo de Investigación en Aplicaciones Fotoquímicas (GIAFOT), Escuela de Química, Facultad de Ciencias, Universidad Nacional de Colombia-Sede Medellín, Calle 59ª 63-020 Autopista Norte, P.O. Box 3840, Medellín, Colombia.
  • Ruiz OS; Facultad de Ciencias, Departamento de Geociencias, Universidad Nacional de Colombia-Sede Medellín Medellín, Medellín, Colombia.
  • Valencia GC; Grupo de Investigación en Aplicaciones Fotoquímicas (GIAFOT), Escuela de Química, Facultad de Ciencias, Universidad Nacional de Colombia-Sede Medellín, Calle 59ª 63-020 Autopista Norte, P.O. Box 3840, Medellín, Colombia.
  • Mercado DF; Grupo de Investigación en Aplicaciones Fotoquímicas (GIAFOT), Escuela de Química, Facultad de Ciencias, Universidad Nacional de Colombia-Sede Medellín, Calle 59ª 63-020 Autopista Norte, P.O. Box 3840, Medellín, Colombia. DFabioMercado@gmail.com.
Environ Sci Pollut Res Int ; 29(38): 57127-57146, 2022 Aug.
Article em En | MEDLINE | ID: mdl-35344143
Seven composites of iron oxide nanoparticles embedded in organic microparticles mediated by Cu(II) were synthesized using yerba mate (Ilex paraguariensis) dry leaf extract as precipitant, capping agent, and dispersant medium, using different Cu/Fe molar ratios. A thorough characterization of the particles by transmission electron microscopy (TEM), X-ray diffraction (XRD), thermogravimetric analysis-mass spectrometry (TGA-MS), Fourier transform infrared spectrometer (FTIR), and atomic absorption-spectrometry (AA) indicates that all materials have spheric-like morphology with nanoparticles composed by metal oxide phases embedded into organic microparticles. Interestingly, this organic matter is proposed to play an important role in the solids' photocatalytic activity in a photo-Fenton reaction, in which iron photo-leaching was elucidated, and a mechanism through ligand-to-metal charge transfer processes was proposed. All materials showed catalytic activity in the methyl orange elimination, achieving discolorations up to 96% in 2 h under UV irradiation at 375 nm. An experimental correlation between all samples' UV/Vis spectra and their performances for methyl orange discoloration was observed. This process opens a landscape very interesting for the use of agroindustrial residues for green synthesis of metal oxide nanomaterials and their use and understanding of organo-metallic systems participation in Fenton-based processes.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ilex paraguariensis Idioma: En Revista: Environ Sci Pollut Res Int Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Colômbia País de publicação: Alemanha
Texto completo
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ilex paraguariensis Idioma: En Revista: Environ Sci Pollut Res Int Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Colômbia País de publicação: Alemanha