Abstract
A novel bipolar electrode cell, which we refer to as a stacked rotating bipolar electrode cell, has been developed for recovery of heavy metals from dilute solutions. The cell consists of two feeder electrodes and four stator bipolar electrodes alternating with five rotor bipolar electrodes. Fins are mounted on the anode surfaces to promote turbulence and scrape of the deposited copper. The characteristics were studied in batch operation of powdery copper recovery from cupric sulfate solutions in the concentration range from 500 to 10 ppm Cu 2+. A high recovery speed is achieved due to the excellent stirring effect of the rotating electrodes and the increase in micro-turbulence at the large active surface caused by the deposition of powdery copper. The high speed electrolysis and the large surface area per until cell volume as attained by stacking the bipolar electrodes also lead to a high space time yield.
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