摘要
以低氯离子浓度下微污染水中的氨氮(NH4+-N)为研究对象,采用电化学氧化法对污染水中的氨氮进行去除。通过静态和正交实验得到了极板的最佳运行参数。实验结果表明:Cl-浓度在各影响因素中对NH4+-N去除影响最大,且在其他影响因素不变的条件下,通过改变电解电流是解决动态运行时NH4+-N去除率下降较经济有效的方法。最佳运行工艺条件为:电流密度10 mA/cm2,电解时间10 min,极板间距1 cm,溶液初始pH为7,Cl-浓度100 mg/L,面体比102 m2/m3,氨氮的平均去除率在80%以上。
Taking the micro-polluted raw water with low chloride ion concentration as the object,electrochemical oxidation process was adopted for NH＋4-N removal.Through the static and orthogonal test,the optimal operating parameters were obtained.The results showed that Cl-made the greatest impact on the ammonia removal in all of the factors,and the more cost-effective method for preventing decrease of ammonia removal efficiency was changing the electrolytic current when the conditions of the other factors were fixed.The optimal reaction conditions were as follows ： current density was 10 mA/cm2,HRT was 10 min,the plate spacing was 1 cm,initial solution pH was 7,Cl-concentration was 100 mg / L,the ratio of area and volume was 102 m2/m3,the average removal rate of ammonia was 80%.
出处
《环境工程学报》
CAS
CSCD
北大核心
2012年第5期1553-1558,共6页
Chinese Journal of Environmental Engineering
基金
组织部优秀人才资助项目(20071D1600700416)
中国矿业大学(北京)青年基金(2009QH01)
关键词
电化学氧化
氨
氮
最佳运行参数
微污染水
electrochemical oxidation
ammonia
optimal operating parameters
micro-polluted water
