多孔陶瓷粒子电极电催化氧化降解2-氨基吡啶

采用以CuO-ZnO/多孔陶瓷粒子电极构建的三维电催化氧化反应器降解2-氨基吡啶，考察了初始pH值、槽电压、电解质投加量和曝气流速对降解效果的影响和反应的电流效率，并通过检测2-氨基吡啶降解过程中几种含氮产物，分析了2-氨基吡啶的降解过程。结果表明：酸性条件和碱性条件比中性条件更有利于2-氨基吡啶的降解，在初始pH值为8.4、槽电压为15 V、支持电解质用量为30 g/L、曝气流速为40 L/h的条件下，处理150 min，2-氨基吡啶和COD的去除率可分别达到83.98%和74.44%，粒子电极可以显著提高电流效率。2-氨基吡啶降解过程分析表明：在电催化条件下，N2和NO3?-N是2-氨基吡啶主要含氮矿化产物，且2-氨基吡啶的开环转化和矿化可以同步进行。

Degradation of 2-aminopyridine with porous ceramic particle electrodes by electrocatalytic oxidation

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.