R. Chiarizia et al., UPTAKE OF METAL-IONS BY A NEW CHELATING ION-EXCHANGE RESIN .2. ACID DEPENDENCIES OF TRANSITION AND POSTTRANSITION METAL-IONS, Solvent extraction and ion exchange, 11(5), 1993, pp. 967-985
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.