ISSN: 1304-7191 | E-ISSN: 1304-7205
Xerogel of fast kinetics and high adsorption capacity for cationic dye removal
1Department of Chemical Engineering, Yıldız Technical University, Istanbul, Turkey
Sigma J Eng Nat Sci - DOI: 10.14744/sigma.2022.00019
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Silica-based xerogel was prepared by the two-step sol-gel method to investigate its methylene blue (MB) removal performance. The characteristics of the prepared adsorbent were determined using X-ray diffraction (XRD), Fourier transforms infrared (FTIR), scanning electron microscopy (SEM), and N2 adsorption/desorption analyses. The MB removal studies were conducted with different operating parameters and optimal conditions were found to be 0.06 g adsorbent dosage, and 20 mg.L-1 initial MB concentration at 45 min. The Langmuir isotherm best represents the MB adsorption equilibrium data and the high maximum adsorption capacity was achieved with 1666.67 mg.g-1. The kinetic mechanism of the study is defined by the pseudo-second-order kinetic model. Additionally, the adsorption of MB on xerogel exhibited fast kinetics, reaching a high removal capacity (96.56%) in a minute.