Aniline degradation by electrocatalytic oxidation.
The degradation of aniline solution in alkaline medium of pH 11.0 by electrocatalytic oxidation has been studied using an electrochemical reactor containing a SnO(2)-Sb(2)O(3)-PtO anode and a Ti cathode, both of 54 cm(2) area. Hydroxyl radicals (HO(z.rad;)) 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(z.rad;) 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 CO(2) involving those intermediates is proposed.
Li
Yijiu
Y
Department of Chemistry, Tongji University, Siping Road 1239, 200092, People's Republic of, Shanghai, China.
Wang
Feng
F
Zhou
Guoding
G
Ni
Yaming
Y
D000814:Aniline Compounds / Q000737:chemistry*; D002384:Catalysis; D002851:Chromatography, High Pressure Liquid; D004563:Electrochemistry; D008401:Gas Chromatography-Mass Spectrometry; D008956:Models, Chemical; D010084:Oxidation-Reduction; D019800:Phenol / Q000737:chemistry; D020156:Salicylic Acid / Q000737:chemistry; D013053:Spectrophotometry
D000814:Aniline Compounds; D019800:Phenol; D020156:Salicylic Acid; C023650:aniline