Study on Ni(II) ion adsorption from aqueous solutions by a novel magnetic sorbent: adsorption isotherms

The contamination of water sources with heavy metal ions, particularly nickel (Ni(II)), poses a serious environmental and health hazard.This study investigates the adsorption behavior of a newly synthesized magnetic adsorbent for the removal of Ni(II) ions from aqueous solutions.Various parameters influencing the adsorption process were examined, including pH, contact time and initial metal ion concentration.The results indicated that the highest adsorption capacity was achieved at pH 6.To describe the adsorption process, various isotherm models, including Langmuir, Freundlich, Temkin, and Redlich-Patterson, were investigated.The study confirmed that the results were found to be consistent with the Langmuir model.The maximum adsorption capacity for Ni was determined to be 145,6 mg/g.The thermodynamic parameters of adsorption were also studied, and the study confirmed that adsorption is an endothermic process.The results suggest that the new magnetic adsorbent is a promising material for Ni(II) ion removal from wastewater.