典型有机氮类化合物存在时的加氯消毒控制方法  

Chlorine Dosage Control Method for Water Disinfection in Presence of Organic Nitrogenous Compounds

作　　者：陶辉[1] 陈连生[1] 陈卫[1] 陈亮[1] 冯博[1] 

机构地区：[1]河海大学环境学院,江苏南京210098

出　　处：《中国给水排水》2014年第7期39-42,共4页China Water & Wastewater

基　　金：国家自然科学基金资助项目(50908074);中央高校基本科研业务费资助项目(2009B17314)

摘　　要：氯是目前最为常用的消毒剂,当其投加到水中后不但会与氨产生折点氯化反应,还会与有机氮类化合物反应生成不具有消毒效果的有机氯胺,从而对经典的折点氯化反应产生影响。采用在水中经常检出的甘氨酸作为典型有机氮类化合物,研究了其对自由氯生成特性的影响。研究显示,有机氮类化合物会使得出现自由氯时的Cl2∶N值大大延迟,并且自由氯出现时的Cl2∶N值以及由有机氮化合物所引起的额外耗氯量均与有机氮类化合物含量具有良好的线性关系。由于氯与氨氮、有机氮类化合物反应时的化学计量比不同,因此不宜采用总氮作为加氯量的控制指标。在上述研究的基础上提出了存在有机氮类化合物时的加氯控制方法。Chlorine is the most widely used disinfectant in water disinfection. Besides the break- point chlorination of chlorine with ammonia, chlorine can also react with organic nitrogenous compounds and form organic chloramines which have no disinfection ability, thus affecting the classical breakpoint chlorination. Using glycine, which is usually detected in water as an organic nitrogenous compound, the free chlorine formation characteristics were studied. The results showed that organic nitrogenous com- pounds delayed the Cl2： N ratio at which free chlorine appeared. This Cl2： N ratio and the extra chlorine consumed by organic nitrogenous compounds were related to the organic nitrogenous compounds contents. However, due to the different stoichiometric ratios of chlorine with ammonia and organic nitrogenous com- pounds, TN could not be used as control parameter in chlorination. Based on the experimental results, a chlorine dosage control method in water in the presence of orzanic nitrogenous compounds was proposed.

关 键 词：消毒 液氯 有机氮类化合物 甘氨酸 

分 类 号：TU991.2[建筑科学—市政工程]