One‐step green synthesis of nano‐sodalite zeolite and its performance for the adsorptive removal of crystal violet

Abstract

AbstractIn this study, a novel approach for the synthesis of nano‐sodalite zeolite crystals is explored. Synthesized nanocrystals were then characterized successfully via various techniques such as X‐ray diffraction (XRD), Fourier transform infrared (FT‐IR), scanning electronic microscopy (SEM), and Brunauer–Emmett–Teller (BET), and energy‐dispersive X‐ray analysis (EDX). Then, the performance of nano‐sodalite zeolite was evaluated for its potential in the adsorptive removal of cationic crystal violet (CV) dye. The effects of various experimental parameters, such as pH, adsorbent dosage, contact time, initial dye concentration, and temperature, were investigated in batch mode. Also, the adsorption isotherm, kinetic, and thermodynamic parameters were studied. The equilibrium sorption data were fitted better by the Freundlich isotherm than by the Langmuir isotherm. The kinetic adsorption data obeyed the Lagergren pseudo‐second order model. Thermodynamic parameters analysis revealed that the adsorption of CV from an aqueous solution by nano‐sodalite zeolite was a spontaneous and endothermic process. The results indicated that nano‐sodalite zeolite could be applied as a promising adsorbent for the efficient removal of CV from aqueous solutions.