Adsorptive and Kinetic Studies of Resin for Removal of Cs+ and Sr2+ from Aqueous Solution

Resumo

Mixed bed resin was prepared using T-46 (H⁺) and A-33 (OH⁻) through mixing their ratio 1: 1.6 and characterized by Fourier transform infrared scanning electron microscopy and energy dispersive X-Ray spectroscopy. The mixed bed resin was evaluated for the removal of cesium and strontium from contaminated water. The aim of our study was to find the suitable condition for removal of Cs and Sr ions from water under different conditions viz. initial concentration of Cs and Sr ions, contact time, dose of resin and pH. Cs and Sr ions, adsorption data are fitted well with Freundlich and Langmuir isotherm models. The adsorption capacity was 7.53 and 9.58 mg/g for Cs and Sr ions, respectively as obtained at initial concentration 10 mg/L by Langmuir isotherm. Adsorption kinetics was followed by pseudo-second order reaction. The rate constants of pseudo-second order reaction were calculated and quite high correlation coefficients R² 98–99.5 were obtained. The resin also used for removal of Cs and Sr ions from tap water (TDS—200 mg/L) and saline water (TDS—2000 mg/L), and showed 90% (Cs) and 95% (Sr) removal at 10 mg/L of each ion concentration.