Abstract
Abstract A novel nanocrystalline zeolite X (nZX) was synthesized using coal fly ash of eastern India for adsorptive removal of a textile dye—crystal violet (CV) from aqueous solution. nZX was characterized by TEM, XRF, FESEM, XRD, FTIR, and BET. The nZX has a surface area, an average crystal size, an average particle size, crystallinity, and product yield of 651.34 m2/g, 16.28 nm, 27.28 nm, 82% and 91% respectively. A maximum of 99.52% CV was removed at optimized condition of pH 9, 60 min contact time, 50 °C temperature, 100 mg/L initial dye concentration and 1.0 g/L adsorbent mass. A high correlation coefficient (R2 = 0.998) good agreement between the predicted and experimental values. The maximum Langmuir adsorption capacity of 234.57 mg/g was obtained. The adsorption of CV followed a pseudo-second order kinetic model. The synthesized nZX was also found to be very efficient up to five regenerative cycle in removing the dye. Therefore, the synthesized nZX could be utilized for efficient removal of CV dye in real wastewater.
Published Version
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