Evaluation of Amberlite IRC‐718 Chelating Ion Exchange Resin in Loading‐Elution‐Regeneration Cycles for the Separation and Recovery of Strontium from Alkaline Radioactive Waste

Abstract

The separation and recovery of radiostrontium from simulated alkaline reprocessing waste solution has been studied using Amberlite IRC-718, a chelating resin containing iminodiacetic acid groups. The breakthrough behavior of strontium has been determined by conducting an extended column run. The column loading performance has been correlated with batch equilibration results. Efficient elution of loaded strontium has been achieved using dilute nitric acid. Satisfactory column performance has been demonstrated in repeated loadingelution-regeneration cycles. Finally, the characteristics of used resin have been determined to ascertain its efficacy for further use.

Removal of strontium from aqueous solutions and synthetic seawater using resorcinol formaldehyde polycondensate resin

“…The FTIR pattern with the above characteristic peaks agreed with the previous results of RF resin [34]. The ion exchange capacity of RF determined by the method of Banerjee et al [28] was 7.0 ± 0.3 meq/g and that by the method of Samantha et al [23] was 6.7 ± 0.2 meq/g. These values are very close to the values of 6.0 -6.9 meq/g reported by others [23,26] for the ion exchange capacity of RF.…”

“…The main adsorbent used in this study was RF resin but four other commercially available adsorbents namely CsTreat, ammonium molybdophosphate (AMP), Zeolite, and Amberlite FPC 3500 were also used to compare their Sr adsorption capacities [28,29]. RF resin was prepared by following the procedure described by Samanta et al [23] where a mixture of solutions with resorcinol: formaldehyde: NaOH: H2O mole ratio of 1:2.5:1.5:50 was used.…”

“…Ion exchange capacity of the RF resin was measured using two methods [23,28]. In both methods, the RF was equilibrated with known concentrations of NaOH and NaCl and the amounts of NaOH consumed in the ion exchange reaction were determined by titrating the remaining NaOH with 0.1 M HCl using phenolphthalein indicator.…”

“…The removal efficiency (%) of a metal ion by RF was determined by dividing the amount adsorbed by the amount initially present and multiplying by 100. The distribution coefficient (Kd) (L/g) of a metal was calculated by dividing the amount of metal adsorbed (meq/g) by the equilibrium concentration of the metal in solution (meq/L) [23,25,28] and the selectivity coefficient of Sr with respect to another metal (Ks) was determined by dividing the Kd of Sr by the Kd of the other metal [31]. The higher the Ks value of Sr, the higher the selectivity of adsorption of Sr with respect to the other metal.…”

Kinetics and optimization of L-tryptophan separation with ion-exchange chromatography

“…Ion exchangers, such as ion exchange resin, are solid and insoluble high molecular weight polyelectrolytes that carry functional groups and exchange ions. Due to high-efficiency, low cost, and reutilization of ion exchange resins, they have a wide application in scientific research, industrial production and other processes [3][4][5][6]. The ion exchange process is usually operated in a packed bed in an industrial separation process.…”