Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/38092
Título: Fenton-like processes and adsorption using iron oxide-pillared clay with magnetic properties for organic compound mitigation
Palavras-chave: Pillared clay
Organic compound
Photo-Fenton
Oxidation mechanism
Data do documento: Jan-2015
Editor: Springer
Citação: TIRELI, A. A. et al. Fenton-like processes and adsorption using iron oxide-pillared clay with magnetic properties for organic compound mitigation. Environmental Science and Pollution Research, [s.l.], v. 22, n. 2, p. 870-881, Jan. 2015.
Resumo: In this work, a new step was added to the classic route of iron-pillared clay obtention, resulting in a material with both magnetic and oxidative properties. The saturation of the material surface intercalated with trinuclear acetate-hydroxo iron (III) nitrate in glacial acetic acid atmosphere before heat treatment promoted magnetic phase formation (FePMAG). The material was characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), nitrogen adsorption/desorption isotherms, scanning electron microscopy coupled with energy dispersive spectroscopy (SEM/EDS), and X-ray photoelectron spectroscopy (XPS). FePMAG showed an increase of 0.57 nm in basal spacing which contributed to the specific surface area increase from 39.1 to 139.2 m2/g. The iron phase identified by XRD and XPS was maghemite, with a little presence of hematite formed by the trinuclear acetate-hydroxo iron (III) nitrate decomposition during heat treatment. In the adsorption tests, FePMAG displayed a good capacity for organic dye methylene blue (MB) removal, reaching 41 % at 150 min. Under photo-Fenton conditions, the material showed an excellent MB oxidation capacity, completely removing the color of the solution within 90 min. Identification of the oxidation products with lower molecular (m/z = 160, 220, and 369) mass was performed by electrospray ionization mass spectroscopy (ESI-MS).
URI: https://link.springer.com/article/10.1007/s11356-014-2973-x
http://repositorio.ufla.br/jspui/handle/1/38092
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