High-efficient treatment of wastewater contained the carcinogen naphthylamine by electrochemical oxidation with γ-Al2O3 supported MnO2 and Sb-doped SnO2 catalyst

► A method for the electrochemical catalytic oxidation of 1-naphthylamine in synthetic wastewater is elucidated. ► The novel catalyst, Mn-Sb-Sn/γ-Al2O3, was prepared and characterized. ► A fairly satisfactory result (92.2% COD removal rate) was achieved in 20 min at pH 7 under mild conditions. ► The hypothetical mechanism of electrochemical catalytic oxidation degradation was also proposed.