Efficient removal of iodide/iodate from aqueous solutions by Purolite A530E resin.

Efficient removal of iodide (I⁻) and iodate (IO₃⁻) from aqueous solution is highly desirable for waste disposal and remediation of radioiodine contamination. We report here a bifunctional anion exchange resin Purolite A530E for the effective I⁻/IO₃⁻ adsorption, which shows a priority anion-exchange affinity for I⁻ (99%) over IO₃⁻ (9.7%). The maximum adsorption capacity for I⁻ is 275.16 mg·g⁻¹ fitted by the Langmuir isotherm model, much higher than most adsorbents. Furthermore, Purolite A530E exhibits great selectivity for I⁻ over competing anions, which endows the resin with promising I⁻ remediation that over 99% I⁻ can be removed from simulated Hanford groundwater (HGW). [ABSTRACT FROM AUTHOR]