Phuong Lan Tran-Nguyen, Kim-Phung Ly, Shella Permatasari Santoso, Nguyen-Phuong-Dung Tran, Artik Elisa Angkawijaya, Hong-Nam Nguyen, Quoc-Khanh Huynh, Ngo Truong Ngoc Mai, Minh-Nhut Nguyen, Huynh-Giao Dang, Nguyen Quoc Khuong
BACKGROUND: A straightforward and robust technique to develop a heterogeneous Fenton-like catalyst is demonstrated, involving the incorporation of iron oxides into zeolite X derived from rice husk ash, which improved the removal efficiency for crystal violet (CV) with high dye concentration. RESULTS: The synthesis of an iron oxides/zeolite X composite (IOZX) was investigated at room temperature with an iron salt to zeolite X ratio of 10 wt%, an ion exchange time of 5 h and 15% NaOH. With a surface area of 312 m2 g−1, the obtained IOZX also comprised SiO2 (40.96%), Al2O3 (32.08%), Na2O (24.07%) and Fe2O3 (2.72%). Besides, the uniform distribution of iron oxide particles in the composite was determined by scanning electron microscopy and transmission electron microscopy. IOZX exhibited excellent CV removal performance at concentrations ranging from 200 to 500 mg L−1. After 30 min, 96.87% of CV was removed at the optimal conditions such as pH 7, a catalyst dose of 0.5 g L−1, 10 mmol L−1 H2O2 concentration and a 300 mg L−1 CV concentration. The degradation followed the pseudo-first-order kinetic model, with R2 close to 0.99. The catalytic activities were effectively retained after 10 reaction cycles, indicating the robust performance of IOZX. CONCLUSION: The key success of the current work was the formation of an IOZX catalyst derived from affordable and commonly available byproducts, leading to cost reductions and supporting sustainable practices. The synthesized catalyst could be further advanced and potentially applied for the remediation of cationic dye from aqueous solution. © 2025 Society of Chemical Industry (SCI). © 2025 Society of Chemical Industry (SCI).
Faculty of Mechanical Engineering, Can Tho University, Can Tho, Viet Nam; Stem Cell Laboratory, Department of Molecular Biology, Institute of Biotechnology and Food, Can Tho University, Can Tho, Viet Nam; Department of Chemical Engineering, Widya Mandala Surabaya Catholic University, Surabaya, Indonesia; Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Center for Sustainable Resource Science, RIKEN, Yokohama, Japan; Vietnam Academy of Science and Technology, University of Science and Technology of Hanoi, Hanoi, Viet Nam; Faculty of Chemical Engineering, Can Tho University, Can Tho, Viet Nam; Faculty of Crop Science, Can Tho University, Can Tho, Viet Nam