Adsorption of Zr(IV) Ions from Aqueous Acidic Solutions onto TANB Adsorbent

Abstract

Adsorption is a process that can be used effectively to remove metal ions from aqueous solutions. Natural and modified bentonite are widely used as low-cost materials to increase the competitive advantage of the process. In recent years, extensive research has been carried out among articles on the adsorption of heavy metal ions on natural and modified bentonite. The investigated working parameters are initial metal ion concentration, solution pH, adsorbent dosage and temperature. The optimum condition for the adsorption process of thermally activated natural bentonite (TANB) is 125 mesh, which is at a contact time of 180 min at a concentration of 100 mg/L and has an adsorption capacity of 15.432 mg/g. The adsorption process on the prepared bentonite includes chemical adsorption and follows the Langmuir adsorption isotherm pattern. It was found that the adsorption of Zr(IV) metal ions on TANB adsorbent occurs exothermically. TANB adsorbent has proven to be sufficient materials to remove Zr(IV) metal ions from aqueous solutions.