Experimental study on the treatment of chromium containing wastewater by electric flocculation

Abstract

For the ecological environment of serious pollution of wastewater containing chromium, made of aluminum plate electrocoagulation as chromium-containing wastewater treatment equipment, the effect of current density, treatment time, electrode spacing and other factors on the treatment effect. Experimental results show that the electro-flocculation process, a current density of 1.5, the initial pH of 6.0 and an electrolysis time of 1 hour, the plate spacing of 1cm optimal removal efficiency can reach 64%. In the electrocoagulation process, with increasing current density, electrolysis time, the metal ion removal increased; reduced electrode spacing, making the removal of heavy metal ions to achieve better results.