UPTAKE OF METAL-IONS BY A NEW CHELATING ION-EXCHANGE RESIN .2. ACID DEPENDENCIES OF TRANSITION AND POSTTRANSITION METAL-IONS

Diphonix(TM) is a new dual-mechanism polyfunctional resin containing s ulfonic and gem-diphosphonic acid groups. In Part 1 of this series the effectiveness of Diphonix in removing actinide ions from very acidic solutions was demonstrated. In this paper we report on the uptake of v arious transition and post-transition metal ions with Diphonix and two other resins for comparison. The results show that Diphonix has a ver y high affinity for Fe(III) and Cr(III) in very acidic solutions. From neutral solutions Diphonix exhibits a high selectivity for lead and t ransition metals over calcium Conditions for efficient stripping of th e investigated ions have been found.