Ti/SnO2-Sb-Ni electrode electrochemical oxidation BIT in water
1,2-benzoisothiazoline-3-one(BIT)is a new kind of broad spectrum industrial fungicide,which is difficult to be treated by biochemical method because of its strong bactericidal ability.Electrochemical oxidation pretreatment is an effective method to eliminate its antibacterial ability.The effects of different typical anodes on BIT removal rate were experimentally compared,the effects of BIT concentration,pH,current density,electrolyte concentration and other operating parameters on BIT degradation rate were investigated by using Ti/SnO2-Sb-Ni as anode.Combined with UV-Vis absorption spectroscopy and fluorescence spectroscopy,the structural changes during BIT degradation were explored.The results showed that compared with commercial electrodes,Ti/SnO2-Sb-Ni electrodes could efficiently electrochemically oxidize BIT and its products to eliminate their biological toxicity.In the electrochemical BIT oxidation process of Ti/SnO2-Sb-Ni electrode,the optimal current density was 15 mA/cm2,pH and initial sodium sulfate concentrations had little influence on BIT degradation,and the optimal initial BIT concentration was 15 mg/L,the heterocyclic was destroyed first during BIT degradation,and the benzene ring was then destroyed.
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