Deciphering the science behind electrocoagulation to remove suspended clay particles from water.
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.
Holt
P K
PK
Department of Chemical Engineering, University of Sydney, NSW 2006, Australia.
Barton
G W
GW
Mitchell
C A
CA
D000535:Aluminum / Q000737:chemistry; D000538:Aluminum Silicates / Q000302:isolation & purification*; D019149:Bioreactors; D000077215:Clay; D004563:Electrochemistry / Q000379:methods*; D005160:Facility Design and Construction; D006859:Hydrogen / Q000737:chemistry; D008962:Models, Theoretical; D012722:Sewage / Q000737:chemistry / Q000382:microbiology*; D013997:Time Factors; D014873:Water Pollutants / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
D000538:Aluminum Silicates; D012722:Sewage; D014873:Water Pollutants; D006859:Hydrogen; D000535:Aluminum; D000077215:Clay