Ibrahim E H, Denizli A, Bektaş S, Genç O, Pişkin E
Department of Chemistry, Hacettepe University, Ankara, Turkey.
J Chromatogr B Biomed Sci Appl. 1998 Dec 11;720(1-2):217-24. doi: 10.1016/s0378-4347(98)00441-1.
Poly(2-hydroxyethylmethacrylate-ethyleneglycoldimethacrylate) [poly(HEMA-EGDMA)] microspheres carrying Cibacron Blue F3GA and/or thionein were prepared and used for the removal of cadmium ions Cd(II) from human plasma. The poly(HEMA-EGDMA) microspheres, in the size range of 150-200 microm in diameter, were produced by a modified suspension copolymerization of HEMA and EGDMA. The reactive triazinyl dye-ligand Cibacron Blue F3GA was then covalently incorporated into the microspheres. The maximum dye incorporation was 16.5 micromol/g. Then, thionein was bound onto the Cibacron Blue F3GA-incorporated microspheres under different conditions. The maximum amount of thionein bound was 14.3 mg/g. The maximum amounts of Cd(II) ions removed from human plasma by poly(HEMA-EGDMA)-Cibacron Blue F3GA and poly(HEMA-EGDMA)-Cibacron Blue F3GA-thionein were of 17.5 mg/g and 38.0 mg/g, respectively. Cd(II) ions could be repeatedly adsorbed and desorbed with both types of microspheres without significant loss in their adsorption capacity.
