摘要
利用CuO-CeO2/γ-Al2O3多相催化剂替代复极性固定床电解槽中的绝缘填料,构建新型电催化氧化体系。考察了槽电压、pH、气体流量和极板间距等因素对垃圾渗滤液中氨氮(NH4+-N)去除效果的影响,确定了适宜的反应条件。当槽电压为15.0V、pH=7、曝气量为0.08m3/h、极板间距为3.0cm时,反应180min后,对NH4+-N的去除率能达到95%以上。对渗滤液的电催化氧化降解进行动力学分析,NH4+-N的脱除符合准一级动力学方程。经过该体系处理渗滤液,出水的可生化性由0.107提高至0.524。
CuO-CeO2/γ-Al2O3 heterogeneous catalyst has been used for replacing the insulation material of the bipolar packed bed cell,so as to establish a new electro-catalytic oxidation system.The effects of the influential factors,such as cell voltage,pH,airflow and electrode span on the removal efficiency of ammonica-nitrogen（NH4^＋-N） from landfill leachate are investigated,and appropriate reacting conditions are confirmed.When pH of landfill leachate is 7,cell voltage 15.0 V,aerate dosage 0.08 m3/h,and electrode span 3.0 cm,the removal rate of ammonia-nitrogen can reach over 95%.The electro-catalytic oxidation degradation of the landfill leachate is analyzed by kinetics.It is found that the removal of NH4＋-N accords with the pseudo-first-order equation of kinetics.Moreover,the biodegradability of the effluents has been improved from 0.107 to 0.524 after the treatment.
出处
《工业水处理》
CAS
CSCD
北大核心
2010年第10期52-55,共4页
Industrial Water Treatment
基金
国家自然科学基金资助(50978082)
关键词
垃圾渗滤液
电催化氧化
催化剂
氨氮
landfill leachate
electro-catalytic oxidation
catalyst
ammonia-nitrogen
