METAL-ION COMPLEXATION OF POLY(ACRYLAMIDE)-SUPPORTED AMINES CROSS-LINKED WITH N,N'-METHYLENE-BIS-ACRYLAMIDE

The complexation of amino functions supported on poly(acrylamides) wit h 2-20 mol-% of N-(acrylamidomethyl)acrylamide (NNMBA) crosslinks towa rds Co(II), Ni(II), Cu(II), Zn(II), and Hg(II) ions was investigated. The metal ion uptake was found to be dependent on the extent of the NN MBA crosslinking. The observed trend in complexation is Hg(II) much gr eater than Cu(II) > Zn(II) > Ni(II) > Co(II). The kinetics of complexa tion was found to be of first order. The derived metal complexes were characterised by IR and EPR. The complexed resins can be recycled seve ral times without capacity loss. The metal-desorbed resins showed spec ificity to the metal ion which was initially present. The extent of sw elling of the complexed resins is lower than that of the uncomplexed r esins and it varies with the extent of crosslinking.