Adsorption of Methyl Red from Aqueous Solutions by Algerian Bentonite Clay

In order to removal methyl red from aqueous solutions using adsorption method, Algerian bentonite-type clay from Mostaganem region (MBC) has been first acid-activated then employed as adsorbent. The influence of several parameters (kinetics, contact time, sorbent amount and pH) on the adsorption capacity was evaluated and discussed. The results indicated that the adsorption was favourable at lower pH. The adsorption isotherm was well described by the Freundlich model and showed high MR adsorption with high correlation coefficient (R² = 0.985). The adsorption capacity of MBC found to be 2.0 mg g⁻¹. It was seen that pseudo-second order equation describes the adsorption kinetics. The results indicated that this bentonite-type clay is favourable to be used as an economical adsorbent for the removal of methyl red dye.