Yazar "Kir, E" seçeneğine göre listele

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    The effect of chelating agent on the separation of Fe(III) and Ti(IV) from binary mixture solution by canon-exchange membrane
    (ACADEMIC PRESS INC ELSEVIER SCIENCE, 2005) Kir, E; Cengeloglu, Y; Ersoz, M
    The competitive transport of Fe(III) and Ti(IV) ions and the effect of chelating agents on separation from binary mixture solutions through charged polysulfone cation-exchange membrane (SA(3)S) has been studied under Donnan dialysis conditions. The amount of chelating agent was taken as an equimolar of Fe(III) ion in the feed phase. In this process, the membrane separated two electrolyte solutions: the feed solution, initially containing metal salts (Fe, Ti), or metal salts solution, containing a chelating agent, and the other side (receiver solution) being HCl solution. An external potential field is not applied. It was observed that the chelating agents affect the metal transport; the transport of Fe(III) is decreased and the transport of Ti(IV) is increased. (c) 2005 Elsevier Inc. All rights reserved.
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    Recovery and concentration of metals from red mud by Donnan dialysis
    (ELSEVIER SCIENCE BV, 2003) Cengeloglu, Y; Kir, E; Ersoz, M; Buyukerkek, T; Gezgin, S
    The transport fluxes of Al(III), Fe(III), Ti(IV) and Na(I) ions from red mud through charged heterogeneous and Neosepta CMB and CMX cation exchange membranes has been studied as a function of H+ ion concentration in stripping phase. In this process, the feed solutions is initially red mud aqueous solution or half-diluted solution which contains Al(III), Fe(III), Ti(IV) and Na(I) ions and other side is HCl solutions at different concentrations (0.05, 1.0 M). It was shown that the fluxes and recovery factor value of metal ions were enhanced with increasing concentration in feed phase and H+ ion concentration in stripping phase. (C) 2003 Elsevier B.V. All rights reserved.
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    Transport of Cu(Ii) Ions Through Charged Cation-exchange Membranes
    (JOHN WILEY & SONS INC, 2001) Ersöz, Mustafa; Çengeloglu, Yunus; Kir, E; Koyuncu, Mustafa; Yazıcıgil, Zafer
    Transport of Cu(II) ions through polysulfonated cation-exchange membranes under Donnan dialysis conditions was studied as a function of the pH gradient. The used charged membranes are homogeneous (polysulfone composition) and heterogeneous (polysulfone with polyester support) structures which are strongly acidic cation-exchange microporous-type membranes. The flux increases with decreasing of the pH gradient, which is influenced by the transport of copper ions. The quantitative relations were obtained which describe the time dependence of the transport system with the equilibrium distribution and the results were correlated with the flux data as well as with the membrane structure. (C) 2001 John Wiley & Sons, Inc.
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    Transport of hexavalent chromium through anion-exchange membranes
    (ELSEVIER SCIENCE BV, 2003) Cengeloglu, Y; Tor, A; Kir, E; Ersoz, M
    This papers deals with the transport of hexavalent chromium through SB-6407, AFN and ACM anion-exchange membranes in contact with different salt solutions. The effect of salt solutions on the transport of chromium(VI) was investigated. The effect of salt solutions was observed at different sequences and the transport efficiencies of the membranes was found to be in the order SB-6407>AFN>ACM. The transport was found to be highest in a single state.