摘要
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150min,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。
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.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2014年第1期219-223,256,共6页
Chemical Industry and Engineering Progress
基金
湖南省研究生创新基金项目(CX2012B207)
关键词
电催化氧化
多孔陶瓷粒子电极
2-氨基吡啶
electrocatalytic oxidation
porous ceramic particle electrodes
2-aminopyridine
