Treatment of highly concentrated tannery wastewater using electrocoagulation: Influence of the quality of aluminium used for the electrode

Journal of Hazardous Materials
S ElabbasJ-P Leclerc

Abstract

This paper deals with the ability of electrocoagulation (EC) to remove simultaneously COD and chromium from a real chrome tanning wastewater in a batch stirred electro-coagulation cell provided with two aluminium-based electrodes (aluminium/copper/magnesium alloy and pure aluminium). Effects of operating time, current density and initial concentration of Cr(III) and COD have been investigated. The concentrations of pollutants have been successfully reduced to environmentally acceptable levels even if the concentrated effluent requires a long time of treatment of around 6h with a 400A/m(2) current density. The aluminium alloy was found to be more efficient than pure aluminium for removal of COD and chromium. Dilution of the waste has been tested for treatment: high abatement levels could be obtained with shorter time of treatment and lower current densities. Energy consumption of the electrocoagulation process was also discussed. The dilution by half of the concentrated waste leads to a higher abatement performance of both COD and chromium with the best energy efficiency.

Citations

Dec 7, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Aysenur Ogedey, Mehtap Tanyol
Apr 13, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Hongfeng ZhangXiaocong Wang
Mar 24, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Weiwei ZhaoXiaocong Wang
May 10, 2017·Environmental Science and Pollution Research International·Benny Marie B EnsanoVincenzo Belgiorno
Apr 17, 2019·Environmental Science and Pollution Research International·Elizabeth Carvajal-Flórez, Santiago-Alonso Cardona-Gallo
Jun 25, 2021·Environmental Science and Pollution Research International·Milad MousazadehMohammad Mahdi Emamjomeh
Nov 24, 2021·Environmental Science and Pollution Research International·Mahdieh MehriBahram Nasernejad

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