Notice of RetractionDegradation of Aniline by a Dual-Electrode Oxidation Process in Aqueous Electrolyte
The efficiency and the mechanism of aniline degradation by an electrochemical oxidation process using Ti/SnO<sub>2</sub>-Sb<sub>2</sub>O<sub>5</sub> as anode and graphite as cathode were studied in two aqueous electrolytes with/without Fe<sup>2+</sup>. The results showed that the oxidation of aniline could not take place only by the single action of H<sub>2</sub>O<sub>2</sub>. Anodic oxidation was accounted for the degradation of aniline in the absence of Fe<sup>2+</sup>, while in the presence of Fe<sup>2+</sup> both electro-Fenton oxidation and anodic oxidation (dual-electrode electrochemical oxidation) could destruct aniline effectively, and in this case the former was the main mechanism. Under the conditions of cathodic potential 0.65V, pH 3.0 and 0.5mM Fe<sup>2+</sup>, the removal rate of COD was 77.5% after 10h treatment and a current efficiency of 97.8% for COD removal could be obtained. This work indicates that the dual-electrode electrochemical oxidation is feasible for the degradation of organic compounds by using Ti/SnO<sub>2</sub>-Sb<sub>2</sub>O<sub>5</sub> as anode as well as the reasonable electrode potential; in addition, a high current efficiency can be achieved.