Technical Proceedings of the 2011 Clean Technology Conference and Trade Show

Clean Technology 2011

Chapter 5: Water Technologies

A. Suárez, N. Agudelo
Universidad Libre, CO
248 - 250
electrocoagulation, wastewater, heavy metal removal
The Response Surface Methodology (RSM) was employed to investigate the effects of pH and current density on the removal of cadmium, copper and zinc in a artificial wastewater with a large COD by electrocoagulation technique. Six iron electrodes were used in a 2 l reactor with agitation. A regulated AC/DC power supply was used maintained a constant voltage/current. The initial samples were prepared with a COD of 10000 mg/l, oils and grease of 2000 mg/l, and heavy metals concentration of 250 mg/l. The initial and final concentrations were measured by atomic absorption spectrometer. Removal of more than 99% was obtained during the process for 60 minutes of application time. The conditions for optimal removal were at pH of 8 and a intensity of 3A for cadmium, pH of 7.02 and Intensity of 3 A for copper and zinc.
Optimizing the removal of Heavy Metals of an artificial wastewater by electrocoagulation using response surface methodology