Work

Green synthesis of magnetic type Zeolites 4A as catalyst for the elimination of quinoline yellow by the Fenton process: Optimization and kinetic investigation

Year: 2025

Type: article

Abstract: This work describes the hydrothermal synthesis and characterization of zeolite 4A (Zeo-4A) and magnetite zeolite (Zeo-4A@Fe 3 O 4 ) from Cameroonian raw kaolin. The study also explores the efficiency of Zeo-4A@Fe 3 O 4 for the removal of quinoline yellow (E104) via Fenton process. XRD , FTIR, SEM, EDX , NMR-MAS and TGA-DSC characterizations show that Zeo-4A is crystalline with cubic morphology, while Zeo-4A@Fe 3 O 4 exhibits a bonding interaction between zeolite and Fe 3 O 4 nanoparticle leading to morphological structural changes. The degradation of quinoline yellow by heterogeneous Fenton process was carried out by varying several parameters, namely solution pH (3–7), H 2 O 2 concentration (0.5–1.5 mol/L), quinoline yellow concentration (50–100 mg/L), and catalyst mass (50–100 mg). The results of catalytic performance tests reveal that the degradation efficiency of synthetic Zeo-4A, Zeo-4A@Fe 3 O 4 and Fe 3 O 4 were 1.71 %, 93.60 % and 92.65 %, respectively, after 60 min. Confirmatory tests were carried out by response surface methodology based on the Box-Behnken design, and a degradation rate of 98.81 % was obtained under optimum conditions of pH 3.84, 50.14 mg/L, 100 mg, and 1.5 g/L; which is well in line with the model predictions. A significant quadratic regression model R 2 = 91.35 % and the adjusted coefficient of determination value (adjusted R 2 = 82.04 %) were observed using the analysis of the variance. The study of catalyst recovery and reusability shows that the catalysts remain stable with a degradation rate greater than 66 % after five cycles. The kinetics results show that the degradation of E104 follows first and second order kinetic models , influenced by pH and catalyst mass, with optimum efficiency at pH 3. The characterization results of the material after degradation show that it maintains its structural integrity after use.

Source: Hybrid Advances

DOI: 10.1016/j.hybadv.2025.100401

Authors: Roland Urselin Noumsi Foko, Cyrille Ghislain Fotsop, Donald Raoul Tchuifon Tchuifon, Charles Banenzoué, Anatole Guy Blaise Azebaze

Institutions: University of Douala, Université de Dschang, Otto-von-Guericke-Universität Magdeburg

Language: English

Topic: Advanced oxidation water treatment

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDGs: Responsible consumption and production, Clean water and sanitation

Open Access status: gold

Estimated APC paid: $1,540