摘要
通过静态试验，分别研究了河水中氯与氨氮的质量比、反应时间、pH值及初始NH3-N浓度对NH3-N去除效果的影响。试验结果表明，对于不同天气情况下的水样，氯与氨氮的质量比（以Cl2：N计）为10：1～12：1时，NH3-N浓度可降低至0．5mg／L以下；反应时间20min时，NH3-N浓度可达到0.3mg／L，工程应用中可将反应时间延长至30min；pH对NH3-N去除效果没有明显影响，一般不需要调节河水pH；在pH值为8．0，氯与氨氮的质量比为12：1，初始NH3-N浓度为0．5-3．0mg／L时，反应后NH3-N浓度均〈0．3mg／L。
The effects of mass ratio of chlorine to ammonia-nitrogen,reacting time,pH value and initial concentration on the results of removal of NH3-N are studied respectively through the static test.The results can show that for samples under different weather conditions,when the mass ratio of chlorine to ammonia-nitrogen reaches to 10:1~12:1,the concentration of NH3-N is lower than 0.5 mg/L.When reacting time is 20 min,the concentration of NH3-N can reach 0.3 mg/L,30 min will be more effective in engineering application.It is not significantly affected by pH on NH3-N removal,generally pH is not necessary to be adjusted.Under the condition of that pH = 8.0,mass ratio of chlorine to ammonia-nitrogen is 12:1 and the initial concentration of NH3-N is 0.5~3.0 mg/L,the final concentration of NH3-N is lower than 0.3 mg/L.
出处
《中国市政工程》
2013年第2期39-42,107,共4页
China Municipal Engineering
基金
上海市科委科研计划项目(11dz1201703)
关键词
次氯酸钠
氨氮
氯与氨氮的质量比
反应时间
PH值
初始浓度
sodium hypochlorite
ammonia-nitrogen
mass ratio of chlorine toammonia-nitrogen
reaction time
pH value
initial concentration
