Deciphering the science behind electrocoagulation to remove suspended clay particles from water. |
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Authors: | P K Holt G W Barton C A Mitchell |
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Affiliation: | Department of Chemical Engineering, University of Sydney, NSW 2006, Australia. |
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Abstract: | Electrocoagulation removes pollutant material from water by a combination of coagulant delivered from a sacrificial aluminium anode and hydrogen bubbles evolved at an inert cathode. Rates of clay particle flotation and settling were experimentally determined in a 7 L batch reactor over a range of currents (0.25-2.0 A) and pollutant loadings (0.1-1.7 g/L). Sedimentation and flotation are the dominant removal mechanism at low and high currents, respectively. This shift in separation mode can be explained by analysing the reactor in terms of a published dissolved air flotation model. |
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