多孔陶瓷粒子电极电催化氧化降解2-氨基吡啶  

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

作　　者：李明[1] 梁雪梅[1] 潘珍[1] 殷杰[1] 孟勇[1,2] 尹笃林[2] 

机构地区：[1]湖南师范大学资源循环综合技术研究中心,湖南长沙410081 [2]湖南师范大学化学化工学院资源精细化及先进材料湖南省高校重点实验室,湖南长沙410081

出　　处：《化工进展》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)

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.

关 键 词：电催化氧化 多孔陶瓷粒子电极 2-氨基吡啶 

分 类 号：X703[环境科学与工程—环境工程]