عنوان مقاله [English]
In this study, removal of Zr (IV) from aqueous solutions was investigated using magnetic 〖Fe〗_3 O_4@PEG@TBP nanoparticles as a new adsorbent. Experiments were conducted to study the effects of initial pH, amount of adsorbent, shaking time and initial Zr (IV) concentrations on zirconium sorption efficiency. The sorption of zirconium on 〖Fe〗_3 O_4@PEG@TBP nanoparticles was pH dependent, and the optimal pH was 6.0. In kinetics studies, the sorption equilibrium was reached within 10 min, and the experimental data were well fitted by the pseudo-second-order model, and the equilibrium sorption capacities calculated by the model were almost the same as those determined by experiments. The maximum zirconium sorption capacity onto magnetic nanoparticles was estimated to be about 52 mg/g at 25 C. Sodium acetate, sodium nitrate, sodium fluoride and ammonium oxalate were used as desorbing agents. The highest values of zirconium desorption (100 %) was achieved using 0.5 M sodium fluoride as the desorbing agent. Present study suggested that this method is simple, fast separation and with high efficiency method for removal of zirconium from aqueous solutions by using magnetic nanoparticles.