Deep Eutectic Solvent-Magnetite Hybrid Composite for Effective Removal of Zinc (II) Ions from Industrial Wastewater

Abstract

Zinc is one of the important trace element, but its high amount in aquatic bodies is detrimental to health. Hence, the objective of this paper was to synthesize deep eutectic solvent (DES) nanoparticles and evaluate their adsorption behavior for the removal of zinc (II) ions from industrial wastewater using appropriate standard techniques. The pseudo-first-order and pseudo-second-order models were utilised to investigate the adsorption kinetics, and the Freundlich and Langmuir isotherms were employed to assess the adsorption isotherms. The results of the kinetic study shows that the adsorption process follows the Langmuir isotherm model (0.9740) and pseudo-second-order kinetics (0.9186).  At pH 7 and room temperature, the highest adsorption capacity was determined to be 22.883 mg/g. These findings indicate that DES nanoparticles may be a promising, highly effective, and ecologically benign adsorbent for extracting zinc (II) ions from wastewater.