[Characteristics and chlorination activity of natural organic matter in water].

XAD resin adsorption technique is used to separate natural organic matter in the water into four fractions, namely: humic acid fraction, fulvic acid fraction, hydrophilic acid fraction and hydrophilic non acid fraction. Trihalomethane formation velocity and chlorination activity of each fraction are studied. Results show that fulvic acid is the main components which contained 50.7% of total organic carbon and produce more trihalomethane than other fractions in the raw water. Humic acid, fulvic acid and hydrophilic acid exhibited more chlorination activity and faster reactive velocity with chlorine than hydrophilic non acid fraction.