二氧化氯消毒时三氯甲烷形成量的研究

研究了二氧化氯与氯消毒时三氯甲烷的形成量。结果表明，氯可与水中有机物反应形成三氯甲烷，其形成量随水中有机物含量，氯投加量，ＰＨ值的升高而升高，当ＣＯＤ为３ｍｇ／Ｌ，投氧量为７ｍｇ／Ｌ时，经４８ｈ反应后，三氯甲烷形成量将超过国家标准规定的６０μｇ／Ｌ，二氧化氯不与有机物反应形成三氯甲烷，１１．３３ｍｇ／Ｌ的二氧化氯与ＣＯＤ为２．６７ｍｇ／Ｌ水样经４８ｈ反应，三氯甲烷形成量低于检出限，二氧化氯与氯复佤

Formation of Chloroform during Water Disinfection with Chlorine Dioxide

The results show that chlorine reacts with organic matter to form chloroform,the production of which increases with an increase in COD,pH,and chlorine dosage. The level of chloroform would exceed the national drinking water quality standard(60μg/L),48 hours after dosing 7 mg/ L chlorine to water with a COD of 3 mg/L chlo rine dioxide does not react with organic matter to form chloroform. After adding 11.33 mg/L of chlorine dioxide to a water having a COD of 2.67 mg/L for 48 hours,the level of chloroform was below detection limit. Moreover,a combined use of chlorine dioxide and chlorine can inhibit the formation of chloroform. However,chlorine dioxide was not able to remove chloroform already present in water.