次氯酸钠应用于二次供水安全消毒的小试研究

采用次氯酸钠应用于自来水二次供水消毒小试研究.考察消毒剂次氯酸钠投加量、氨氮、CODMn和pH等因素对余氯衰减及三氯甲烷和四氯化碳等消毒副产物生成的影响.结果表明:随着药剂投加量的增加,三氯甲烷的生成量和生成速率逐渐增大,而四氯化碳的生成量较低且无明显的变化规律；随氨氮投加量的增加,三氯甲烷和四氯化碳的生成量减少；原水...

APPLICATION OF SODIUM HYPOCHLORITE FOR DISINFECTION OF SECONDARY WATER SUPPLY

A secondary water supply disinfection test was conducted by adding sodium hypochlorite in water samples in order to analyze the effects of pharmaceutical dosage, NH3-N, CODMn, pH and some other factors on the residual chlorine decay and chloroform and carbon tetrachloride formation in this research. The results of the test showed that: with the increased of pharmaceutical dosage, the amount of chloroform formation and generation rate increased gradually, but the lower yields of carbon tetrachloride and no significant variation. The generation of chloroform and carbon tetrachloride reduced with the increased of ammonia dosage. The increased of CODMn in raw water can promote the formation of chloroform and carbon tetrachloride. Within a certain range, as the pH increased, chloroform and carbon tetrachloride were increasing. And in the tested water samples，methylene chloride, trichloroethane, dibromo-chloro-methane, and other disinfection byproducts were not found.