Efficient removal of textile dye using nanosized fly ash derived zeolite-x: Kinetics and process optimization study
| Autor: | Sivamani Sivalingam, Sujit Sen |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Langmuir
Materials science Aqueous solution General Chemical Engineering 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Crystallinity Adsorption Fly ash Yield (chemistry) Particle size 0210 nano-technology Zeolite Nuclear chemistry |
| Zdroj: | Journal of the Taiwan Institute of Chemical Engineers. 96:305-314 |
| ISSN: | 1876-1070 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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