Influence of current density on oxygen transfer in an electroflotation cell

The objective of this work is to study the transfer of oxygen from gas to liquid phase in an electroflotation cell. The measurements were performed in a laboratory scale cell using insoluble electrodes, titanium coated with ruthenium oxide as anode and stainless steel as cathode. The volumetric mass...

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Bibliographic Details
Published in:Journal of applied electrochemistry 2007-08, Vol.37 (8), p.887-892
Main Authors: Mansour, L. Ben, Kolsi, K., Ksentini, I.
Format: Article
Language:English
Subjects:
Aeration
Cathodic cleaning
Coated electrodes
Current density
Drinking water
Electroflotation
Liquid phases
Mass transfer
Oxygen transfer
Ruthenium oxide
Stainless steels
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Summary:The objective of this work is to study the transfer of oxygen from gas to liquid phase in an electroflotation cell. The measurements were performed in a laboratory scale cell using insoluble electrodes, titanium coated with ruthenium oxide as anode and stainless steel as cathode. The volumetric mass transfer coefficient KLa, was characterized for clean tap water as liquid phase for different values of current density (J). The global coefficient of mass transfer based on the liquid film, KL, and the specific interfacial area, a, were characterized. A model which relates KLa to current density was established. Different evaluation criteria of oxygen transfer in electroflotation process were determined and compared with other aeration process.
ISSN:0021-891X
1572-8838
DOI:10.1007/s10800-007-9326-0