Electrocoagulation/Flotation Process for Chromium

The presence of chromium in drinking water has led to several health effects such as toxic and carcinogenic. The aim of this applied-analytical study is to investigate chromium removal from urban drinking water by batch reactor electrocoagulation/flotation with aluminum electrodes. Chromium removal efficiency is examined in different operating cases of the variables current density (0.8-2.4 mA/cm2), initial concentration (1-100 mg/l), pH (3.5-10.5), and time (20-60 min). The results indicate that increasing the current density from 0.8 to 2.4 mA/cm2 and reaction time from 20 to 60 min have a positive effect on the Cr+6 removal efficiency. Results show that, with an initial concentration of 100 mg/l, a pH of 3.5, a reaction time of 60 min, and a current density of the anode of 2.4 mA/cm2, and Cr+6 reduction is 100%. The results of chromium removal efficiency by Taguchi method show that reaction time is the most important variable.

Keywords:

Copper , Drinking water , Electrocoagulation/flotation , Taguchi