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Vol.2 , No. 3, Publication Date: Jul. 29, 2015, Page: 17-29
 of sugarcane bagasse (SB) were investigated for their effectiveness as absorbent for removal of safranin O, a cationic dye, from water and characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Effects of pH, initial dye concentration and contact time were studied in batch mode; zero point charge and surface chemistry were determined; and isotherm models and kinetic equations were developed. Peak adsorption was achieved at pH 10. The adsorption capacity was enhanced by increasing the initial concentration of safranin O. When acidity and basicity were determined by the Boehm method, more acidic groups were found to dominate on the surface of SB. The dye adsorption experimental data were analyzed using both Freundlich and Langmuir models. The Langmuir model showed a superior fit over that of the Freundlich model for the three adsorbent treatments. Lagergren-first-order and pseudo second-order models were used to determine the adsorption kinetics; the pseudo second-order model proved to be the optimum model. The maximum adsorption volume was found to be 58.853, 62.884 and 54.822 mg.g-1 for untreated, NaOH-treated and H2SO4-treated SBs, respectively. Adsorption reached equilibrium at approximately 1020 minutes (17 hrs). This study suggests that SB is a good candidate for a low-cost adsorbent.&picture=http://www.aascit.org/aascit/decorators/img/journal/904.jpg)
| [1] | M. Farahani, Department of Chemical & Process Engineering, Faculty of Engineering and Built Environment, University Kebangsaan Malaysia, UKM Bangi, Malaysia. |
| [2] | M. Kashisaz, Department of Chemical & Process Engineering, Faculty of Engineering and Built Environment, University Kebangsaan Malaysia, UKM Bangi, Malaysia. |
| [3] | S. R. S. Abdullah, Department of Chemical & Process Engineering, Faculty of Engineering and Built Environment, University Kebangsaan Malaysia, UKM Bangi, Malaysia. |
Three treatments (untreated, NaOH-treated and H2SO4-treated) of sugarcane bagasse (SB) were investigated for their effectiveness as absorbent for removal of safranin O, a cationic dye, from water and characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Effects of pH, initial dye concentration and contact time were studied in batch mode; zero point charge and surface chemistry were determined; and isotherm models and kinetic equations were developed. Peak adsorption was achieved at pH 10. The adsorption capacity was enhanced by increasing the initial concentration of safranin O. When acidity and basicity were determined by the Boehm method, more acidic groups were found to dominate on the surface of SB. The dye adsorption experimental data were analyzed using both Freundlich and Langmuir models. The Langmuir model showed a superior fit over that of the Freundlich model for the three adsorbent treatments. Lagergren-first-order and pseudo second-order models were used to determine the adsorption kinetics; the pseudo second-order model proved to be the optimum model. The maximum adsorption volume was found to be 58.853, 62.884 and 54.822 mg.g-1 for untreated, NaOH-treated and H2SO4-treated SBs, respectively. Adsorption reached equilibrium at approximately 1020 minutes (17 hrs). This study suggests that SB is a good candidate for a low-cost adsorbent.
Keywords
Adsorption, Cationic Dyes, Sugarcane Bagasse, Surface Acidity/Basicity, Point Zero Charge
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