Please use this identifier to cite or link to this item: https://repositorio.ufrn.br/jspui/handle/123456789/29295
Title: Kaolin-based magnetic zeolites A and P as water softeners
Authors: Bessa, Raquel de Andrade
Costa, Luelc de Sousa
Oliveira, Cristiane Pinto
Bohn, Felipe
Nascimento, Ronaldo Ferreira do
Sasaki, José Marcos
Loiola, Adonay Rodrigues
Keywords: Zeolite A;Zeolite P;Magnetic zeolites;Magnetite nanoparticles
Issue Date: Jun-2017
Publisher: Elsevier
Citation: BESSA, Raquel de Andrade; COSTA, Luelc de Sousa; OLIVEIRA, Cristiane Pinto; BOHN, Felipe; NASCIMENTO, Ronaldo Ferreira do; SASAKI, José Marcos; LOIOLA, Adonay Rodrigues. Kaolin-based magnetic zeolites A and P as water softeners. Microporous And Mesoporous Materials, [s.l.], v. 245, p. 64-72, jun. 2017. Elsevier. Disponível em: https://www.sciencedirect.com/science/article/pii/S1387181117301610?via%3Dihub. Acesso em: 10 jun. 2020. http://dx.doi.org/10.1016/j.micromeso.2017.03.004.
Portuguese Abstract: In this work, we report an experimental investigation on the synthesis of zeolites A and P, using kaolin as the main SiO2 and Al2O3 sources, by hydrothermal route, as well as on the structural, spectroscopic and magnetic properties of the produced zeolite composites with magnetite nanoparticles. The zeolites were successfully synthesized and the characterization of the obtained materials was carried out considering different techniques, including X-ray diffraction (XRD), infrared vibrational spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), as well as measurements of the magnetization as a function of the temperature and applied magnetic field. XRD analysis confirmed zeolites A and P as main crystalline phases, with a low intensity peak regarding the presence of small quantities of quartz remaining from the unreacted clay. SEM showed the well-defined morphologies of zeolites and, in the composites, magnetite nanoparticles dispersed over their surface. The average size of the magnetite nanoparticles was ca. 50 nm as determined by TEM analyses. The magnetic characterization confirmed the ferrimagnetic behavior of the magnetite nanoparticles and of the composites, as well as verified that the magnetic properties of the nanoparticles are not affected by the zeolites in the composite formation. Thus, the results evidenced that high quality zeolite composites with magnetite nanoparticles can be reached by considering the employed low cost method, placing this route as an attractive alternative for water softening reaching removal levels of about 97% in the first application times
URI: https://repositorio.ufrn.br/jspui/handle/123456789/29295
ISSN: 1678-765X
Appears in Collections:CCET - DFTE - Artigos publicados em periódicos

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