Adsorptive removal of stable and radioactive Pb(II) isotopes from aqueous solution using bentonite, zeolite and perlite: characterization, isotherm and thermodynamic studies

Abstract In this study, stable and radioactive lead removal from aqueous solution by adsorption using bentonite, zeolite perlite minerals obtained various locations in Türkiye was studied batch experiments. The adsorbents were first characterized X-ray diffraction (XRD), fluorescence (XRF), Fourier-transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) energy-dispersive spectroscopy (EDS), then the physicochemical properties determined. effects of factors that influence adsorption, such as pH, adsorbent dosage, contact time, initial Pb 2+ ion concentration, temperature shaking rate, studied. modelled Langmuir, Freundlich Dubinin–Radushkevich isotherms. capacities for followed order: bentonite > perlite, maximum 131.6, 36.1 21.5 mg g –1 , respectively. data fit well with Langmuir isotherm. bonding ions on confirmed XRF FTIR analyses after process. spontaneous endothermic. process took place cation exchange addition to electrostatic interaction. Furthermore, 210 studied, analyte being analysed a liquid scintillation counter. It seen Pb(II) ions, these also adsorbed decay products Pb, which Po Bi. percentages 95%, 38% 30% those 75%, 60% 74%