腐植酸氯化过程中氯仿生成的基础研究

为了研究用氯消毒饮用水过程中产生氯仿等致癌性副产物，进行了采用低分子量腐植酸与次氯酸钠反应生成氯仿的实验，结果表明，在次氯钠浓度，ｐＨ和温度一定的条件，氯仿产量随腐植酸浓度的增大而增加，ｐＨ在７．３－９内，氯仿生成速度最快，ｐＨ大于９时，氯仿生成速率随ｐＨ的升高而下降，氯仿生成量与温度呈正相关关系，腐植酸氯化成氯仿的反应活化能国５１．８ＫＪ，因此设法降低原水中腐植酸含量量降低氯仿含量的有效方法。

Basic Study for the Formation of Trihalomethanes(THMs)in Chlorination Process of Humic Acid

In order to study carcinogenic by-products for example chloioform in disinfeCtion of drinking water with chlry rine, the research on reaction between low molecular weight humic acid and sodium hypochlorite which produced chloroform was carried out. The experimental results indicated that under certain temperature,certain concentration of alum hypehlorite and PH,the amount of chloroform produced increased with the increase of the concentration of humic acid.When PH was in the range of 7.39. 0,the chloroform-producing rate was the fastest.When PH was higher than 9.0,the chloroformproducing rate decrease with the increase of PH. The amount of chlorofom produced was in direct proPOrtion to temperature. The activated energy that chlorinated hundc acid to chloroform was 51.8 kJ.So the effective way to decrease the concentration of chloroform was to decrease the concentration of humic acid in the water.