alexa Adsorption of Victoria blue by carbon Ba alginate beads: kinetics, thermodynamics and isotherm studies.
Biochemistry

Biochemistry

Biochemistry & Physiology: Open Access

Author(s): Kumar M, Tamilarasan R, Sivakumar V

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Abstract The kinetic, thermodynamic and isotherm modeling studies were carried out on adsorptive removal of Victoria blue (VB) dye using activated carbon, Ba/alginate and modified carbon/Ba/alginate polymer beads. The feasibility of sorption process was determined by varying the experimental parameters viz., dye concentration (4-20 mg L(-1)), contact time (10-90 min), pH (3-10), adsorbent dose (0.5-2.5 g) and temperature (303-343 K). Freundlich and Langmuir isotherms were determined and ascertained with the dimensionless separation factor (RL). Lagergren's pseudo-first order, pseudo-second order and intraparticle diffusion model equations were used to analyze the kinetics of the adsorption process. The thermodynamic consistency of adsorption was found with Gibbs free energy (ΔG°), changes in enthalpy (ΔH°) and entropy (ΔS°) were calculated using the Van't Hoff plot. The polymer beads were characterized using Fourier Transform Infrared Spectroscopy (FTIR) and their morphology was determined by scanning electron microscopy (SEM). Copyright © 2013 Elsevier Ltd. All rights reserved. This article was published in Carbohydr Polym and referenced in Biochemistry & Physiology: Open Access

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