Evaluation of anion exchange resin for sorption of selenium (IV) from aqueous solutions

In this work, selenium (IV) was adsorbed from aqueous solutions by the strongly basic anion exchange resin Amberlite IRA 400. Using energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM), the morphology of the resin was investigated both before and after Se(IV) sorption. In order to determine the ideal sorption conditions, a batch approach was used to examine the variables that affect the performance of Se(VI) sorption, including pH, shaking time, adsorbate dosage, starting metal ion concentrations and temperature. The sorption process was satisfactorily explained by the pseudo-second-order kinetic model, according to the experimental findings. The maximum adsorption capacity at pH 3.0 was found to be 18.52 mg/g, and the adsorption rather well followed the Langmuir adsorption isotherm. Moreover, exothermic and spontaneous sorption was the result of the thermodynamic properties (negativity of both ΔG° and ΔH°). The adsorption phase's random distribution of the resin-solution interface is indicated by the positive value of ΔS ^o