摘要
文中通过混凝搅拌试验模拟氯与氨氮发生反应,从反应的合适比例、反应时间、pH及水温等几个方面研究了折点加氯去除氨氮的特性。结果显示:低温酸性水样中氯与氨氮反应合适的比例为8∶1,反应终点时间约为3 h;随着pH的升高,反应终点时间会延长;随着水温的升高,反应终点时间会缩短,氯与氨氮的比例会增大;在无光照的情况下,水中耗氧量代表的一类还原性物质不是耗氯物质。
This paper introduces the reaction of chlorine and ammonia nitrogen by coagulation and stirring test.Characteristics of removing ammonia nitrogen by adding chlorine at break-point were studied from the aspects of reaction proportion,reaction time,pH value and water temperature.Results showed that appropriate ratio of chlorine to ammonia nitrogen in low temperature acidic water sample was 8∶1,and the end-point time was about 3 h.With the increase of pH value,the end-point time of reaction would be prolonged.With the increase of water temperature,the reaction end-point time would be shortened,and the ratio of chlorine to ammonia nitrogen would be increased.In the absence of light,a kind of reducing substances represented by oxygen consumption in water was not chlorine consuming substances.
作者
许高平
冯在玉
任婉璐
甘炜
XU Gaoping;FENG Zaiyu;REN Wanlu;GAN Wei(Jiangxi Province Key Laboratory of Drinking Water Safety,Jiangxi Water Science Testing and Research Co.,Ltd.,Jingdezhen333000,China)
出处
《净水技术》
CAS
2020年第11期106-109,共4页
Water Purification Technology
关键词
折点加氯
PH
水温
氨氮
break-point chlorination
pH value
water temperature
ammonia nitrogen
