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Aniline degradation by electrocatalytic oxidation |
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| Authors: | Li Yijiu Wang Feng Zhou Guoding Ni Yaming |
| Institution: | a Department of Chemistry, Tongji University, Siping Road 1239, Shanghai 200092, People’s Republic of, China b Electrochemical Research Group, Shanghai Institute of Electric Power, Shanghai 200090, People’s Republic of, China |
| Abstract: | The degradation of aniline solution in alkaline medium of pH 11.0 by electrocatalytic oxidation has been studied using an electrochemical reactor containing a SnO2–Sb2O3–PtO anode and a Ti cathode, both of 54 cm2 area. Hydroxyl radicals (HO√) are produced at the anode, being tested with the trace catcher salicylic acid and phenol by spectrophotometery and high performance liquid chromatography. Intermediates dianiline, 4-anilino phenol and azobenzol were detected by gas chromatography–mass spectrometry. The existence of HO√ produced in the aniline degradation was assayed with scavenger tertiary butanol. The results showed that electrocatalytic oxidation is an effective process for the degradation of aniline. A general reaction pathway that accounts for aniline degradation to CO2 involving those intermediates is proposed. |
| Keywords: | Aniline Degradation Electrocatalytic oxidation Hydroxyl radical Tertiary butanol |
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