Degradation of 2-aminopyridine with porous ceramic particle electrodes by electrocatalytic oxidation
Li Min · Huagong jinzhan · 2014
The 2-aminopyridine was treated by three-phase electrocatalytic oxidation reactor in which CuO-ZnO/porous ceramic was used as particle electrodes. This paper investigated the effects of operating parameters included the initial pH,cell voltage,amount of electrolyte and aeration intensity values on 2-aminopyridine removal and current efficiency of the reaction. The degradation process of 2-aminopyridine was studied by analysis of some nitrogen-containing products. Acidic and alkaline conditions showed a higher efficiency than the neutral condition for 2-aminopyridine degradation. When the initial pH was at 8.4,the cell voltage was at 15 V,the amount of electrolyte was at 30 g/L and the aeration intensity was at 40L/h,the 2-aminopyridine and COD degradation rate reached 83.98% and 74.44% after 150min.The results also demonstrated that particle electrodes can significantly improve the current efficiency. The analysis results from the degradation process of 2-aminopyridine indicated that N2 and NO3-N were the main mineralization product of nitrogen,and the destroying of pyridine ring and mineralization can be carried out simultaneously.