Enhancing the adsorption of strontium (II) using TOPO impregnated Dowex 50 W-X8 resin

In this research work, the adsorption of strontium ions from aqueous solutions was studied using Dowex 50 W-X8 resin loaded with TOPO extractant. This study introduces a novel TOPO-impregnated adsorbent with potential applications for efficient and cost-effective nuclear wastewater treatment. The influence of effective operational parameters such as initial pH of the solution, adsorbent dosage, initial strontium concentration in the solution, and contact time was evaluated. In order to investigate the kinetics of the adsorption process, pseudo-first-order and pseudo-second-order models were used. The results indicated a very good agreement between the experimental data and the pseudo-first-order kinetic model. Langmuir and Freundlich models were used to model the equilibrium of the adsorption. Langmuir isotherm model showed good agreement with the experimental data. The maximum adsorption capacity of Dowex 50 W-X8 resin loaded with TOPO for strontium sorption was obtained 163.43 mg/g of adsorbent calculated by the Langmuir model. The result of the present study showed that Dowex 50 W-X8 resin loaded with TOPO extractant can be an effective adsorbent for the sorption of strontium from aqueous solutions and industrial wastewater.