DUAL SORPTION OF METAL-IONS ON A CROSS-LINKED RESIN OF 2-ACRYLAMIDOGLYCOLIC ACID AND 4-VINYLPYRIDINE

A resin containing 4-vinylpyridine and 2-acrylamidoglycolic acid was s ynthesized by radical polymerization with subsequent crosslinking by N ,N'-methylene-bis-acrylamide. The resin was characterized by elemental analyses and FT-IR spectroscopy. The ability of this resin as well as both crosslinked homopolymers to bind Cu(II), Fe(II), Fe(III) and U(V I) was studied at different pHs depending on the metal ion. From pH = 2 U(VI) was sorbed above 96% from an aqueous solution of 1.0 g/L. A du al sorption mechanism to U(VI) depending on the pH is suggested. The e lution of the metal ions from the loaded resins was assayed with H2SO4 and Na2CO3.