Membrane Water Treatment · 2018 · 24 citations · 0 references
EngineeringChemical EngineeringEnvironmental EngineeringSeparation ProcessesWastewater TreatmentWater TreatmentAdsorption ProcessesAdsorptive SeparationsIon ExchangeWastewater ManagementWater Treatment ChemistryAdsorption ModelingAdsorption Of DyesAnion ExchangeAnion Exchange Membrane AdsorptionAnion-exchange MembranesContact Time EffectsIonic StrengthSolution Contact Time
In this work, batch adsorption of anionic dye acid green-25 (AG-25) from aqueous solution has been carried out at room temperature using anion exchange membrane (DF-120B) as a noval adsorbent. The effect of various experimental parameters such as contact time, membrane dosage, ionic strength and temperature on the adsorption of dye were investigated. Kinetic models namely pseudo-first-order, pseudo-second-order, Elovich, liquid film diffusion, Bangham and modified freundlich models were employed to evaluate the experimental data. Parameters like adsorption capacities, rate constant and related correlation coefficients for every model are calculated and discussed. It showed that adsorption of AG-25 onto DF-120B followed pseudo-first-order rate expression. Thermodynamic study indicates that adsorption of AG-25 onto DF-120B is an exothermic and spontaneous process.