title: Adsorption of Victoria blue by carbon/Ba/alginate beads: kinetics, thermodynamics and isotherm studies.
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).
authors.affiliation: Department of Chemistry, Anna University Chennai: University College of Engineering Pattukottai, Rajamadam 614701, India.
authors.forename: M
authors.initials: M
authors.lastname: Kumar
authors.forename: R
authors.initials: R
authors.lastname: Tamilarasan
authors.forename: V
authors.initials: V
authors.lastname: Sivakumar
mesh_terms: D000327:Adsorption; D000464:Alginates / Q000737:chemistry*; D017609:Barium Compounds / Q000737:chemistry*; D002606:Charcoal / Q000737:chemistry*; D002712:Chlorides / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D004058:Diffusion; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008863:Microspheres; D009930:Organic Chemicals / Q000737:chemistry*; D029862:Prosopis / Q000737:chemistry; D013816:Thermodynamics
chemical_list: D000464:Alginates; D017609:Barium Compounds; D002712:Chlorides; D004396:Coloring Agents; D006603:Hexuronic Acids; D009930:Organic Chemicals; C024986:barium chloride; D002606:Charcoal; C041370:victoria blue; D020723:Glucuronic Acid
keywords: Adsorption; Alginate; Barium; Carbon; Polymer composite bead; Victoria blue