电-多相催化氧化处理垃圾渗滤液中氨氮的研究  

TREATMENT OF AMMONIA-NITROGEN IN LANDFILL LEACHATE BY COMBINATION OF HETEROGENEOUS CATALYSIS WITH ELECTROCHEMICAL PROCESS

作　　者：岳琳[1] 王启山[1] 孙晓明[1] 王玉恒[1] 石岩[1] 

机构地区：[1]南开大学环境科学与工程学院,天津300071

出　　处：《环境化学》2008年第2期177-180,共4页Environmental Chemistry

摘　　要：以复极性固定床电解槽为反应器,利用CuO-CeO2/γ-Al2O3多相催化剂取代传统反应器的绝缘填料,构建电-多相催化氧化耦合体系.考察了槽电压、pH值、气体流量和极间距等因素对渗滤液氨氮的影响.结果表明,当槽电压为15.0V,pH为7,曝气量为0.08m3·h-1,极板间距为3.0cm时,反应180min后,氨氮的去除率能达到94.7%.与传统石英砂相比较,利用CuO-CeO2/γ-Al2O3做绝缘填料,氨氮的处理效果明显提高.With the combination of electrochemistry and heterogeneous catalysis in the bipolar packed bed cell, the insulative particle was replaced by CuO-CeO2/γ-Al2O3catalyst and heterogeneous catalytic reactions occurred in an electrochemical reactor. The effects of cell voltage, pH, airflow and electrode span on the treatment of ammonia-nitrogen in landfill leachate were elucidated. The experimental results indicated that the reactor had positive effect on degradation of ammonia-nitrogen. When pH value of landfill leachate was 7, the cell voltage was 15.0V, and air-flow was 0.08m^3·h^-1 , electrode span was 3.0cm, the removal rate of ammonia-nitrogen can reach 94. 7%. The ammonia-nitrogen removal of the reactor filled with CuO-CeO2/γ-Al2O3 as insulative particle was increased about 19. 4% compared with that of reactor filled with quartz sand applied in project.

关 键 词：垃圾渗滤液 电-多相催化氧化 催化剂 氨氮 

分 类 号：X703[环境科学与工程—环境工程]