SORPTION OF HEAVY-METAL IONS ON NEW METAL-LIGAND COMPLEXES CHEMICALLYDERIVED FROM LYCOPODIUM-CLAVATUM

Sorption of heavy metal ions from aqueous solution has been investigat ed as a function of pH using a novel exchanger system whereby Lycopodi um clavatum is functionalized with carboxylate and glyoxime metal-liga nd complexes. The new ligand exchangers were prepared using a reaction of diaminosporopollenin with various metal-ligand complexes of glyoxi me and monocarboxylic acid. The sorptive behavior of these metal-ligan d exchangers and the possibilities to remove and to recover selectivel y heavy metal cations using these systems are discussed on the basis o f their chemical natures and their complexing properties.