Removal of Congo Red from Aqueous Solution by Anion Exchange Membrane (EBTAC): Adsorption Kinetics and Themodynamics
Autor
Khan, Muhammad Imran
Akhtar, Shahbaz
Zafar, Shagufta
Shaheen, Aqeela
Khan, Muhammad Ali
Luque, Rafael
Editor
MDPIFecha
2015Materia
AdsorptionCongo red
Anion exchange membrane
Kinetics
Thermodynamics
METS:
Mostrar el registro METSPREMIS:
Mostrar el registro PREMISMetadatos
Mostrar el registro completo del ítemResumen
The adsorption behavior of anionic dye congo red (CR) from aqueous solutions
using an anion exchange membrane (EBTAC) has been investigated at room temperature.
The effect of several factors including contact time, membrane dosage, ionic strength
and temperature were studied. Kinetic models, namely pseudo-first-order and
pseudo-second-order, liquid film diffusion and Elovich models as well as Bangham and
modified freundlich Equations, were employed to evaluate the experimental results.
Parameters such as adsorption capacities, rate constant and related correlation coefficients
for every model were calculated and discussed. The adsorption of CR on anion exchange
membranes followed pseudo-second-order Kinetics. Thermodynamic parameters, namely
changes in Gibbs free energy (ΔG°), enthalpy (ΔH°) and entropy (ΔS°) were calculated for
the adsorption of congo red, indicating an exothermic process