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    Öğe
    Interaction of metals with humic acid isolated from oxidized coal
    (Hard, 2007) Erdogan, S.; Baysal, A.; Akba, O.; Hamamci, C.
    The sorption behaviour of divalent cations M2+ (Cu, Pb and Zn) and trivalent cations M2+ (Fe, Al) with humic acid isolated from oxidized coal (Hazro,SE Anatolia,Turkey) was followed in aqueous solution. Coal humic acid and metal ion interaction was investigated with special emphasis on the effects of pH, metal ion concentration and humic acid concentration. It has been found that the interaction of humic acid with metal ions in solution increases with pH, decreases with metal ion concentration and increases with humic acid concentration. The differences in sorption ability of particular metal ions on oxidized coal-derived humic acid are Fe> Ph> Cu> A> Zn and Fe> Pb> A> Cu> Zn at pH 2.5 and 3.5, respectively, while they are Fe=Pb=Cu=Al> Zn at both pH 4.5 and 5.5. The interaction of some trivalent (Fe, Al) and divalent(Cu, Pb, Zn) metal ions with humic acid prepared from coal was also studied using FTIR spectroscopy. This has proven helpful with respect to metal binding to understand better the potential sites of binding within the humic acid. Infrared spectroscopy showed the participation of COOH and OH groups in binding to the metal ions.
  • [ X ]
    Öğe
    Synthesis and spectroscopic characterization of transition metal(II) complexes with a novel N2O2 donor ligand
    (Pleiades Publishing Inc, 2007) Baysal, A.; Buldag, A.
    A novel tetradentate Schiff base ligand, 2,2'-{1,2-phenylene-bis[(E)-methylidienenitrilo]}dipyridine-3-ol, has been synthesized by the condensation of phthalaldehyde with 2-amino-3-hydroxypyridine. A series of its complexes with transition metals have been prepared and characterized by a combination of IR, UV-VIS, and LC-MS spectroscopy, magnetic measurements, and elemental analyses. The spectral data of the ligand and its complexes are discussed in connection with structural changes that occur due to complexation.