Synthesis of zeolite type A from metakaolin obtained by thermal treatment of kaolin: Textural and BB41 dye adsorption experimental design studies

• Published in: Separation science and technology Vol. 60; no. 2; pp. 197 - 219
• Main Authors: Khemaissia, Sihem, Nibou, Djamel, Bentourki, Asma, Amokrane, Samira, Hammoudi, Hadda Aya
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 22.01.2025; Taylor & Francis Ltd
• Subjects: Adsorption; Aqueous solutions; BB41 adsorption; Crystallites; Crystallization; Crystals; Design of experiments; Differential thermogravimetric analysis; Dyes; Experimental design; Fourier transforms; Heat treatment; Hydrothermal synthesis; Infrared analysis; Infrared spectroscopy; Kaolin; Lattice parameters; Metakaolin; Microscopy; Parameters; Sodium hydroxide; Spectrum analysis; Synthesis; Temperature dependence; X-ray diffraction; zeolite A; Zeolites
• ISSN: 0149-6395; 1520-5754
• DOI: 10.1080/01496395.2024.2426021

Algerian Kaolin was valorized firstly to synthesized zeolites A and then performed in Basic bleu 41 (BB41) dye from aqueous media. Kaolin was transformed by thermal treatment to Metakaolin (MK) at 700°C for 2 h. Zeolites A are synthesized from MK by hydrothermal crystallization according to optimal conditions (Temperature: 100°C, solid/liquid: 20 g/L, NaOH concentration: 2 mole/L, and time: 24 h). The structural characteristics of samples are determined by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Scanning electronic microscopy (SEM), Energy dispersive spectroscopy (EDS), Thermogravimetric/Differential thermogravimetric analysis (TG/DTG) and Brunauer-Emmett-Teller (BET) method. Zeolites A are obtained with high crystalline percentages (98%) and the sizes of the crystallites (224-463 nm) are proportional to the dimensions of the lattice parameters a 0 . Zeolite A highlighted an uptake BB41 dye of 40% and a maximum capacity of 31.25 mg/g. Langmuir equilibrium isotherm and pseudo-second-order (PSO) models provided a good fit to the adsorption experimental data. The adsorption process is exothermic and within the limits of the energy barrier. The study of the impact of the influenced parameters pH, solid/liquid ratio, concentration, and temperature on the BB41 adsorption onto zeolite A by experiment design showed a strong dependence on pH.