水加氯处理时NHCl_2与溴化物的反应特性研究

A Study on the Characteristics of Reaction of Dichloramine and Bromide at Water Chlorination.

含氨水体进行氯化处理时会产生ＮＨ２Ｃｌ和ＮＨＣｌ２，当水中含有溴化物（Ｂｒ－）时，氯胺类会与水中的Ｂｒ－反应，ＮＨ２Ｃｌ与Ｂｒ－的反应速度随ｐＨ增加和Ｂｒ－浓度降低而减慢；ＮＨＣｌ２与溴化物的反应比较复杂，２者的反应存在着一个诱导期，诱导期的长短与Ｂｒ－浓度对数成反比，ＮＨＣｌ２与Ｂｒ－的反应速度对ＮＨＣｌ２为一级反应；用紫外光谱、气相色谱和疏水微孔渗透法研究了该反应产物，确认反应产物为Ｂｒ－３、Ｎ２，并推定了反应方程式．

onochloramine and dichloramine can be formed at water chlorination which containing ammonia.The chloramine react with bromide contained in water.The reaction rate increases with pH elevating and decreases with descent of bromide concentration.There is an introducing period in the reaction,and this period are inverse proportion with logarithm of bromide concentration.The reaction rate is first order reaction for dichloramine.Reaction products are studied by UV spectrum,gas chromatograph and polytetrafluoroethylene micro porous permeation,and Br - 3 and N 2 have been affirmed.The reaction formula can be infered.