Magnetic CuFe<sub>2</sub>O<sub>4</sub> Nanoparticles Immobilized on Modified Rice Husk-Derived Zeolite for Chlorogenic Acid Adsorption

Magnetic CuFe<sub>2</sub>O<sub>4</sub> Nanoparticles Immobilized on Modified Rice Husk-Derived Zeolite for Chlorogenic Acid Adsorption

Adsorption has emerged as a promising method for removing polyphenols in water remediation. This work explores chlorogenic acid (CGA) adsorption on zeolite-based magnetic nanocomposites synthesized from rice husk waste. In particular, enhanced adsorbing materials were attained using a hydrothermal z...

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Main Authors: Tainara Ramos Neves, Letícia Ferreira Lacerda Schildt, Maria Luiza Lopes Sierra e Silva, Vannyla Viktória Viana Vasconcelos, Corrado Di Conzo, Francesco Mura, Marco Rossi, Gaspare Varvaro, Maryam Abdolrahimi, Simone Quaranta, Sandra Aparecida Duarte Ferreira, Elaine Cristina Paris
Format: Article
Language:English
Published: MDPI AG 2024-11-01
Series:Magnetochemistry
Subjects:
wastewater
chlorogenic acid
adsorption
magnetic nanocomposite
zeolite
rice husk
Online Access:https://www.mdpi.com/2312-7481/10/11/87
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Summary:Adsorption has emerged as a promising method for removing polyphenols in water remediation. This work explores chlorogenic acid (CGA) adsorption on zeolite-based magnetic nanocomposites synthesized from rice husk waste. In particular, enhanced adsorbing materials were attained using a hydrothermal zeolite precursor (Z18) synthesized from rice husk and possessing a remarkable specific surface area (217.69 m<sup>2</sup> g<sup>−1</sup>). A composite material was prepared by immobilizing magnetic copper ferrite on Z18 (Z18:CuFe<sub>2</sub>O<sub>4</sub>) to recover the zeolite adsorbent. In addition, Z18 was modified (Z18 M) with a mixture of 3-aminopropyltriethoxysilane (APTES) and trimethylchlorosilane (TMCS) to improve the affinity towards organic compounds in the final nanocomposite system (Z18 M:CuFe<sub>2</sub>O<sub>4</sub>). While the unmodified composite demonstrated inconsequential CGA removal rates, Z18 M:CuFe<sub>2</sub>O<sub>4</sub> could adsorb 89.35% of CGA within the first hour of operation. Z18 M:CuFe<sub>2</sub>O<sub>4</sub> showed no toxicity for seed germination and achieved a mass recovery of 85% (due to a saturation magnetization of 4.1 emu g<sup>−1</sup>) when an external magnetic field was applied. These results suggest that adsorbing magnetic nanocomposites are amenable to CGA polyphenol removal from wastewater. Furthermore, the reuse, revalorization, and conversion into value-added materials of agro-industrial waste may allow the opportunity to implement sustainability and work towards a circular economy.
ISSN:2312-7481

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