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Effluent treatment using a bipolar electrochemical reactor with rotating cylinder electrodes of woven wire meshes

✍ Scribed by Javier M Grau; José M Bisang

Publisher
Wiley (John Wiley & Sons)
Year
2009
Tongue
English
Weight
186 KB
Volume
84
Category
Article
ISSN
0268-2575

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✦ Synopsis

Abstract

BACKGROUND: The behaviour of a bipolar electrochemical reactor consisting of one or more rotating cylinder electrodes of woven wire meshes is reported using copper and cadmium deposition from dilute solutions as test reactions.

RESULTS: The best performance related to electrode number was determined for copper deposition and was achieved by an arrangement with two bipolar electrodes, for which the conversion in a single pass was approximately 47%. The specific energy consumption was 3.27 kWh kg^−1^ with a normalised space velocity of 23.05 h^−1^. The copper powder obtained showed a nodular and dendritic surface morphology. This reactor configuration was also analysed for cadmium deposition, in which hydrogen evolution takes place simultaneously as a side cathodic reaction, considering the effect of flow rate and total current. The maximum conversion per pass for cadmium removal was 38.91%. In this case the reactor with two bipolar electrodes showed a performance similar to that of a monopolar reactor operated at a rotation speed three times higher.

CONCLUSION: A continuous electrochemical reactor with two rotating bipolar electrodes of woven wire meshes presents a good performance for copper or cadmium removal from dilute solutions. Copyright © 2009 Society of Chemical Industry

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