Recovery of Lead (II) Ions from Aqueous Solutions Using G-26 and MTS9570 Resins with Sulfonic/Phosphonic Functional Groups

This study presents Pb(II) recovery/removal from water solutions using two different commercial ion-exchange resins, i.e., Dowex G-26 with sulfonic functional group and Puromet™ MTS9570 phosphonic groups. Overall, 100% by both resins was obtained at solution pH 3.5, resin dosage 25 g/L, adsorption time 30 min, room temperature, initial concentration 1000 mg/L. Langmuir, Freundlich, Temkin isotherms were used to model the experimental data. The mechanism of process investigated kinetic thermodynamic models. data fitted very well pseudo-second-order model, analysis showed that acidic onto a spontaneous endothermic in nature. Regeneration loaded lead ions tested for three cycles evaluate recyclability. Good stability performance degradation observed.