Leakage of mono- and divalent cations through the weak-base anion exchange membrane in the process of electrodialysis of H2SO4 and its metal salt mixture

• Autorzy: Kultys M. , Koter S. , Gilewicz-Łukasik B. , Koter I.
• Języki publikacji: EN

Abstrakty

EN

Experimental results on the separation of sulfuric acid from its mixture with sodium- and magnesium sulfate, respectively, by the electrodialytic method have been presented. The Selemion AVV membrane as anion-exchange membrane was used. It was found that the leakage of Na+ from the cathode to the anode side of the AAV was higher than that of Mg2+. The leakage of Na+ decreased with the acid concentration whereas that of Mg2+ increased. Surprisingly enough, the permeability of Na+ increased with the electric current density, indicating a substantial contribution of electroosmotic convection to the Na+ flow. The current efficiency of the anions transport (HSO4 -, SO4 2-) through the AAV hardly exceeded 50%. It was independent of the kind of salt present on the cathode side of the AAV.

Słowa kluczowe

EN

anion-exchange membrane; electrodialysis; metal cation leakage; sulfuric acid

• Wydawca: Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Bydgoszcz
• Czasopismo: Ars Separatoria Acta
• Rocznik: 2011
• Tom: No. 8
• Strony: 101--108
• Opis fizyczny: Bibliogr. 10 poz., rys., tab.

Twórcy

autor

Kultys M.

autor

Koter S.

autor

Gilewicz-Łukasik B.

autor

Koter I.

• Faculty of Chemistry, Nicolaus Copernicus University, ul. Gagarina 7, 87-100 Toruń, Poland,

Bibliografia

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• [3] Pierard J., Paquay E., Degrez M., 2002. Recycling by electrodialysis: from lab to industrial applications. Desalination, 149, 393-398.
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• [5] Palatý Z., Bendová H., 2011. Continuous dialysis of sulphuric acid and magnesium sulphate. Sep. Purif. Technol., 76, 400-406.
• [6] Palatý Z., Żáková A., 2004. Separation of H2SO4 + ZnS04 mixture by diffusion dialysis. Desalination, 169, 277-285.
• [7] Palatý Z., Žáková A., 2004. Separation of H2SO4 + CuSO4 mixture by diffusion dialysis. J. Hazard. Mat., 114, 69-74.
• [8] Lorrain Y., Pourcelly G., Gavach C., 1996. Influence of cations on the proton leakage through anion-exchange membranes. J. Membr. Sci., 110, 181-190.
• [9] Koter S., Kultys M., Gilewicz-Łukasik B., 2011. Modeling the electric transport of HCl and H3PO4 mixture through anion-exchange membranes. Membrane Water Treatment, 2, 187-205.
• [10] Koter S., Kultys M., 2010. Modeling the electric transport of sulfuric and phosphoric acids through anion-exchange membranes. Sep. Purif. Technol., 73, 219-229.