摘要：When the effluent from night soil treatment plant was chlorinated, chloroform was formed. The condition for chloroform formation and the substances that formed chloroform were examined. Mass of chloroform formed did not depend on pH, but was in proportion to the added calcium hypochlorite and to reaction time. Humic acid, fulvic acid, hymatomelonic acid, and methanol-water soluble substance were fractionated from the effluent, and all of the fractions formed 7-48 ppb of chloroform, chlorinated with 100 ppm calcium hypochlorite. Besides chloroform, humic acid formed C2H3Cl3, C5H9Cl, and methanol-water soluble substance formed CH2Cl2, CCl4, C2H4Cl2, C2H3Cl3, C3H2Cl2, and C6H5Cl by chlorination.
