Adsorption Performance and Mechanism in Binding of Azo Dye by Raw Bentonite
Citation
Eren, E. (2010). Adsorption performance and mechanism in binding of azo dye by raw bentonite. Clean–Soil, Air, Water, 38(8), 758-763.Abstract
The adsorption behavior of methyl orange (MO) from aqueous solution onto rawbentonite (RB) sample was investigated as a function of parameters such as pH, inor-ganic anion, contact time, and temperature. The Langmuir and Freundlich adsorptionmodels were applied to describe the equilibrium isotherms. Langmuir adsorptioncapacity was found to be 34.34 mg/g at pH 4.0. The pseudo-first-order, pseudo-second-order kinetic, and the intra-particle diffusion models were used to describe the kineticdata. The values of the energy (Ea), enthalpy (DH6¼), and entropy of activation (DS6¼) werecalculated as 38.62 kJ/mol, 36.04 kJ/mol, and 150.05 J/mol K, respectively, at pH 4.0.