Removal of Cr(VI) by Electrocoagulation Using Vertical and Horizontal Rough Cylinder Anodes

摘要

The removal of Cr(VI) from model wastewater by electrocoagulation cells with both vertical andhorizontal iron electrodes was investigated at the laboratory scale. The variables studied were theanode surface roughness, applied current density, initial Cr(VI) concentration, and the anode rotationspeed. The removal efficiency increased with increasing current density and surface roughness anddecreased with increasing initial chromium concentration; by contrast, no significant effects of anoderotational speed were observed, although vigorous solution stirring adversely affected Cr(VI) removal.The performance of the vertical anode design was observed to be superior to that of horizontal parallelelectrodes.