Applicability of diamond electrode/anode to the electrochemical treatment of a real textile effluent

Abstract

In this work, a real effluent discharged by Brazilian textile industry, has been electrochemically treated using boron doped diamond (BDD) anode for removing chemical oxygen demand (COD) and colour. Preliminary experiments were performed under real discharged effluent conditions (pH and conductivity) in order to verify the applicability of this treatment process. However, a partial elimination of COD and colour effluent were achieved, depending on applied current density (20, 40 and 60 mA cm2), respectively. Therefore, different set of experiments were carried out where an amount Na2SO4 was added in the real effluent; then, COD of textile effluent was satisfactorily reduced by employing different operational conditions (current density, temperature, Na2SO4 concentration, flow rate), reducing the time of depuration and consequently, the costs, confirming the potential efficiency of this textile effluent treatmen

The filter-press FM01-LC laboratory flow reactor and its applications

“…As was expected, the COD values decreased as a function of the electrical charge passed during the electrolysis but COD decay did not undergo a marked improvement with increasing electrolyte velocity; the mean fluid velocity does not seem to alter the mineralization process in the case of the planar BDD. The results obtained in [70] appear similar, with a small dependence of COD decay on the velocity, although progressive COD abatement required a higher amount of charge passed for the 3-D BDD anode.…”

Cl-mediated electrochemical oxidation for treating an effluent using platinum and diamond anodes

“…3b). If this behavior is attained, it is frequently characteristic of electrolysis under mass transport control when the electrolysis is performed applying a current higher than the limiting one, as already indicated by other authors [8,21,27].…”

Electrochemical treatment of artificial humidity condensate by large-scale boron doped diamond electrode

“…Recently, boron-doped diamond (BDD) electrode has been attracted great attentions, especially for its particular properties including the wide potential window, low background current, high electrochemical stability and corrosion resistance [7][8][9]. BDD electrodes had been widely used as anodes for the degradation of refractory organic pollutants, such as nitrobenzene [10], salicylic acid [11], real textile effluent [12], dyestuff [13], perfluorinated compounds [14], sulfachloropyridazine [15], sulfanilic acid [16], methyl orange azo dye [17], real landfill leachate [18], and chlorophenoxy herbicides [19]. Meanwhile, reduction reaction simultaneously occurs at the cathode, resulting in generation of H 2 .…”