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    Recovery and Concentration of Al(III), Fe(III), Ti(IV), and Na(I) From Red Mud
    (Academic Press Inc., 2001) Çengeloğlu, Y.; Kır, E.; Ersöz, M.
    The transport of Al(III), Fe(III), Ti(IV), and Na(I) ions through charged polysulfonated membrane under Donnan dialysis conditions has been studied as a function of HCI concentration at room temperature. In this process, the membrane is separated by two electrolyte solutions: one side (donor phase) is initially red mud aqueous solution containing Al(III), Fe(III), Ti(IV), and Na(I) ions and the other side is HCI solution at different concentrations with no external potential field applied. The transport of metal ions through membranes was correlated with the flux data, as well as with estimated diffusion coefficients. It was observed that the transport of metals is influenced by the HCI concentration and the flux of ions increased with H+ ion concentration in the receiver phase.
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    Sorption of Target Anions by Ligand Exchange
    (JOHN WILEY & SONS INC, 1998) Çengeloğlu, Y.; Mercimek, B.; Kara, H.; Ersöz, M.
    The sorption of anionic ligands such as I-, Br-, and SCN- onto diaminoethyl-sporopollenin (DAE-Sporopollenin) was investigated in both column and batch experiments at room temperature. The isotherm binding constants suggest that the resin is most efficient at the binding of I- compared with Br- or SCN-. The general ligand sorption affinity series observed was I- > Br- > SCN-. This ligand sorption could be described by considering the hydration of ions in the exchanger. The sorption behavior of the ligand exchanger and the possibilities of selectively removing and recovering ligands are discussed on the basis of their chemical and complexing properties.