OCTAVIAN DORCA, PIOTR SZCZEPANSKI, VERONICA IONELA PANAIT, SZIDONIA-KATALIN TANCZOS, ANDREEA RADUCU, CRISTINA ORBECI  <br>Transport and Separation of Zn(II)/Mn(II) in a Multimembrane<br>Hybrid System (MHS)

OCTAVIAN DORCA, PIOTR SZCZEPANSKI, VERONICA IONELA PANAIT, SZIDONIA-KATALIN TANCZOS, ANDREEA RADUCU, CRISTINA ORBECI
Transport and Separation of Zn(II)/Mn(II) in a Multimembrane
Hybrid System (MHS)

Abstract:

In this paper the recovery, concentration and/or separation of an equimolar mixture of Zn(II) and Mn(II) sulfates by multimembrane hybrid system (MHS) were evaluated, in which the organic phase is placed between the two solid cation-exchanges membrane. Di(2-ethylhexyl)phosphoric acid (henceforth D2EHPA) dissolved in kerosene was selected as the carrier in the membrane phase,because it is a good extractant of divalent transition metals in hydrometallurgy. Solutions of di(2-ethylhexyl)phosphoric acid in organic solvents are widely used as membranes when metal-containing cations are in the process of separation or concentration. Its ability to selectively and reversibly bind metal ions may enable a liquid membrane to perform difficult separations. All the experiments made in our laboratory demonstrated that MHS is stable over time and is effective for separating and transporting some divalent ions, such as Mn or Zn. The studies of pertraction in the multimembrane hybrid system indicate the feasibility of water removal from the organic liquid membrane phase by pervaporation. It was also found, that the selectivity of Zn2+pertraction increases when the liquid membrane dehydration (pervaporation) is applied. Continuous pervaporation of water increases the concentration of the metal-carrier complexes in the organic liquid membrane. Keywords: multimembrane hybrid system (MHS), liquid membranes, cations separation, pervaporation

Issue: 2013, Volume 64, Issue 9

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