Comparison of strongly and weakly basic anionic resins as adsorbent for acrylic acid removal

Abstract

In the current study, the removal of acrylic acid from the aqueous medium was examined by an adsorption technique using different basic anionic adsorbents, including Amberlite resins (IRA-67 and IRA-400). Amberlite IRA-67 and Amberlite IRA-400 were used as weakly and strongly base anionic resins, respectively. Kinetic, isotherm, and thermodynamic studies were exerted to detect the adsorption properties of these Amberlite IRA resins for the acrylic acid removal. In this context, the impacts of contact time (30-210 min), initial acrylic acid concentration (2%-10% (w/w)), temperature (25 degrees C-55 degrees C), and resin quantity (0.05-0.25 g) on the adsorption capacity (q(e)) were evaluated by experimentally. At these different adsorption conditions, the adsorption capacities of Amberlite IRA resins were determined and compared. The optimal adsorption conditions were determined as the contact time of 180 min, initial acrylic acid concentration of 10% (w/w), the temperature of 25 degrees C, and the resin quantity of 0.05 g. Comparison of Amberlite IRA resins in acrylic acid adsorption indicated that Amberlite IRA-67 with maximum q(e) = 232.44 mg.g(-1) was an effective resin than Amberlite IRA-400 with maximum q(e) = 120.21 mg.g(-1) at the optimal adsorption conditions.