THE EFFECT OF PH AND TEMPERATURE ON THE SORPTION OF ZINC(II), CADMIUM(II), AND ALUMINUM(III) ONTO NEW METAL-LIGAND COMPLEXES OF SPOROPOLLENIN

Sorption of metal ions from aqueous solution onto metal-ligand complex es of sporopollenin derivatives has been measured as a function of pH at several temperatures between 20 and 50 degrees C, Novel metal-ligan d exchange resins possessing oxime and carboxylic acid sidearm functio nality were prepared through the reaction of diaminosporopollenin with dichloro-antiglyoxime and bromoacetic acid, The pH dependencies and s orption isotherms of various metal ions such as Zn(II), Cd(II), and AI (III) on the resin were investigated from aqueous solution, The sorpti on behavior of these metal-ligand complexes of sporopollenin derivativ es and the possibilities of selectively removing and recovering heavy metals are explained on the basis of their chemical nature and complex properties and the results are interpreted in terms of the variations of pH. (C) 1995 Academic Press, Inc.