Precursor Size and Organic Halide Formation Rates in Raw and Coagulated Surface Waters

摘要: The size distribution of organic carbon and halide precursors was determined for raw coagulated waters from two Virginia reservoirs. Organic removal by ferric sulfate coagulation dependent, with larger molecules (>5,000 daltons) removed more effectively than smaller ones (<1,000 daltons). In waters, the specific yields reaction rates chlorine were low compared to corresponding waters. These trends explained selective fulvic acids coagulation. dominant in treated small hydrophobic neutral molecules. Compared acids, they had lower slower chlorine. Because this type molecule not coagulation, their concentration ultimately whether alone sufficient trihalomethane control.