Chelation properties of poly(8-hydroxyquinoline 5,7-diylmethylene) crosslinked with bisphenol-A toward lanthanum(III), cerium(III), neodimium(III), samarium(III), and gadolinium(III) ions

The chelation behavior of poly(8-hydroxyquinoline 5,7-diylmethylene) crosslinked with various amounts of bisphenol-A toward some trivalent lanthanide metal ions, such as La(III), Ce(III), Nd(III), Sm(III), and Gd(III), has been investigated by a static batch equilibration technique. The effects of crosslinking on the chelation characteristics of these resins were studied. The optimal capacity of metal-ion uptake was achieved by incorporating 5-10% Of bisphenol-A into the polymer matrix. A scanning electron microscope was used to analyze the surface morphology of the polymers. The measured water-regain values have shown that the hydrophilicity of the crosslinked polymers increases as the degree of crosslinking is increased.