Treatability Study on Electroplating Effluent by Electro Coagulation

Abstract

Abstract Studies have been conducted into the effectiveness of electro coagulation in the treatment of wastewater containing metal ions (Fe, Zn, Cr, Mn, and Cu). Several operational criteria, including Time, pH, Current, Voltage, combination of electrodes like Fe-Fe, Fe-Al, Al-Al &Al-Fe were evaluated in an attempt to enhance removal efficiency. In addition, the increase of voltage 2.5V, 5V, 10V accordingly the current density also varied 0.12A, 0.24A, 0.53A respectively. The amounts recovered from Iron, Manganese, Copper, Zinc was discovered to be substantially faster than Chromium as a result of different removal strategies. The method was effectively used to treat effluent from electroplating, where an optimum decrease of (Fe, Zn, Cr, Mn, Cu) concentrations beneath permissible limits was obtained, just after 60 min. The 100 percent removal efficiency of Zn, Cr, Cu, Mn were obtained by using the Fe-Fe electrode with 10V and 60 minutes. The iron was removed 100 percent in the combination of Al-Al electrode with 10V and 60 minutes. At the increased time interval, the use of iron electrode increases the concentration of Fe, because iron electrode was the sacrificial electrode.