Removal of Alizarin yellow from water by activated carbon prepared from microwave radiation of rice husk: Thermodynamic, equilibrium and kinetic study
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Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:
In this paper, the rice husk has been used as an abundant and low cost precursor to prepare activated carbon with high surface area for removal of alizarin yellow from water. To prepare activated carbon chemical activation with phosphoric acid has been used. Microwave heating source was used to reduce the treatment time and energy consumption of carbon active preparation. The obtained activated carbon was characterized by SEM, XRD, FT-IR techniques. The influences of adsorbent dosage and temperature on alizarin yellow adsorption were studied. The obtained activated carbons showed a good adsorption capacity for removal of Alizarin yellow from water. Adsorption of alizarin yellow onto the prepared activated carbons was studied by thermodynamics, equilibrium and kinetics point of views. Pseudo first order, pseudo second order, Elovich, Bangham, Langmuir and fractal-like Langmuir models were used to analysis the experimental kinetics data. The equilibrium data were analyzed using Langmuir, Freundlich, Redlich-Peterson, Sips and Temkin models. The best results to fit equilibrium and kinetic experimental data was obtained with Sips isotherm and fractal-like Langmuir model, respectively. The thermodynamic properties of adsorption were determined by thermodynamics study.
Language:
Persian
Published:
Journal of Applied Chemistry Today, Volume:14 Issue: 50, 2019
Pages:
337 to 353
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