Magnetic Adsorbent Based on Faujasite Zeolite Decorated with Magnesium Ferrite Nanoparticles for Metal Ion Removal

Author(s)

Meirelles, Mariana Rodrigues ; Malafatti, Joao Otavio Donizette ; Escote, Marcia Tsuyama ; Pinto, Alexandre Henrique ; Paris, Elaine Cristina

• Document type: Journal article
• Source: MAGNETOCHEMISTRY; v. 9, n. 5, p. 14-pg., 2023-05-20.

Abstract

Magnetic nanoparticles are a promising alternative as a support in adsorption processes, aiming at the easy recovery of the aqueous medium. A faujasite zeolite (FAU) surface was decorated with magnesium ferrite (MgFe2O4) nanoparticles. FAU is a porous adsorbent with high specific surface area (SSA) and chemical stability. The FAU:MgFe2O4 nanocomposite 3:1 ratio (w w(-1)) promotes the combination of the surface and magnetic properties. The results showed the effectiveness of the MgFe2O4 immobilization on the FAU surface, exhibiting a high SSA of 400 m(2) g(-1). The saturation magnetization (Ms) was verified as 5.9 emu g(-1) for MgFe2O4 and 0.47 emu g(-1) for FAU:MgFe2O4, an environmentally friendly system with soft magnetic characteristics. The magnetic nanocomposite achieved high adsorption values of around 94% removal for Co2+ and Mn2+ ions. Regarding its reuse, the nanocomposite preserved adsorption activity of above 65% until the third cycle. Thus, the FAU:MgFe2O4 nanocomposite presented favorable adsorptive, magnetic, and recovery properties for reuse cycles in polluted water. (AU)

• FAPESP's process: 21/14992-1 - Obtainment of nanocomposite membranes consisting of PCL/PMMA/zeolite for application as a chemical sensor in the detection of polyphenol residues from the coffee industry
• Grantee: João Otávio Donizette Malafatti
• Support Opportunities: Scholarships in Brazil - Post-Doctoral