Removal of Cr 3+ by electrocoagulation from simulated wastewater

Abstract

Trivalent chromium (Cr 3+) removal from aqueous solution by electrocoagulation using iron electrodes material was investigated in this paper. Effects of current density, initial concentration of Cr 3+ , operating time, pH, electrode distance, and operating cost have been investigated. At higher current density and solution pH, remarkable removal of Cr 3+ was observed. Experiments have been show that the maximum removal percentage of the Cr 3+ 99.89% was at initial concentration 1000 mg/L, current density 9.34 mA/cm 2 and reaction time 1 hours. Energy consumption was calculated for Cr 3+ removal at different time. The method is observed to be very effective in the removal Cr 3+ ion from aqueous solution. Electrocoagulation process need simple equipment, designable any size, use any chemical substances and low operating cost.

Reduction of Turbidity and Chromium Content of Tannery Wastewater by Electrocoagulation Process

“…The main operating expenses are associated with the consumption of energy and the aluminum electrode. Equations used by different authors (Ulambayar et al, 2014; Varank et al, 2014), can be summarized by eqs 2 and 3. Where E: energy consumption (kWh/m 3 ); U t : total electrolysis voltage (V) ; I t : total electrolysis current (A) ; t: electrolysis time (h) ; V: volume at the optimum time of electrolysis (m 3 ).…”