Journal of Applied Science and Engineering

Published by Tamkang University Press

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Ozone-Regenerable Mesoporous Zeolite Y Pellets Synthesized Hydrothermally and Modified with Fe3+/Mn2+ for Dye Adsorption

 2026

 Volume 35

Vo Tran Minh Khoa1, Nguyen Manh Khang1, Huynh Diem Nhung1, Van Chi Khen1, Pham Thi Tuyet1,2, and Nguyen Quang Long1,2

1Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, Dien Hong

2ward, Ho Chi Minh City, Vietnam; Vietnam National University Ho Chi Minh City (VNU-HCM), Ho Chi Minh City, Vietnam

Received: March 30, 2026
Accepted: July 13, 2026
Publication Date: August 26, 2026

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Column-based system design for methylene blue treatment.

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

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The design of regenerable adsorbents is critical for sustainable wastewater treatment. Mesoporous zeolite Y pellets were synthesized through hydrothermal dealumination-desilication and modified by Fe³⁺ and Mn²⁺ ion exchange. Characterization confirmed preservation of the FAU framework, while BET analysis showed enlarged external surface areas of 102 m²/g for hierarchical Y, 81 m²/g for VM80, and 72 m²/g for Fe-VM80. Column experiments indicated that methylene blue adsorption followed pseudo-first-order kinetics[cite: 5]. Ozone regeneration outperformed the Fenton process, shortening treatment times to 1.5 h for Mn-VM80 and 1 h for Fe-VM80 while maintaining higher cyclic stability. The combination of hierarchical porosity, pelletization, and Fe/Mn modification enabled efficient adsorption-desorption cycling. These ozone-regenerable mesoporous zeolite Y pellets show strong potential as scalable and sustainable adsorbents for dye removal.

Keywords: Mesoporous zeolite Y; MB adsorption; Regeneration; Ozonation; hydrothermal synthesis

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