Effect of iron impregnation on the sorption behaviour of inorganic sorbent toward strontium and yttrium ions from acidic waste

The sorption and selectivity behavior of Sr(II) and Y(III) from acidic media by iron phosphosilicate (IPS) sorbents, evaluated using a batch process, is assessed in this study. The precipitation technique was used to fabricate IPS sorbents, and FTIR, XRD, XRF, thermal analysis, and SEM were among the analytical tools used to characterize them. The adsorption operations were carried out in acidic media in the range of 10 − 3 to 3 M HNO3. According to the study’s findings, the sorption process took 60 minutes to reach equilibrium. It is the pseudo 2nd oreder model that governs reaction kinetics. For Sr(II) and Y(III), the maximal sorption capacities are 13.0 and 7.3 mg/g, respectively, making the isothermal sorption process more pertinent to Langmuir isotherms. The spontaneous and endothermic adsorption process is reflected in the thermodynamic functions. Several eluents were used to desorb Sr(II) and Y(III) from the loaded IPS; 0.1 M HCl is the most efficient eluent. The superior desorption outcomes demonstrate the appropriateness of the IPS as an effective sorbent for removing Sr(II) and Y(III) from acidic solutions.