NOM - CHARACTERIZATION AND TREATABILITY

Because it is not practical to analyze for each individual chemical co mpound present in natural organic matter (NOM), surrogate characteriza tion methods were sought that could identify interrelationships betwee n NOM and its treatability. Source-related and seasonal differences, e ffects of ozonation and coagulation on NOM, characterization of NOM in sequential unit processes including granular activated carbon, and as pects of bromide-NOM interactions are explored. Whereas coagulants rem ove NOM intact, particularly higher-molecular-weight fractions, ozone converts humic to nonhumic material, resulting in NOM fractions that c ould be difficult to remove by subsequent coagulation. Bromide ion can confound analytical interpretation of separation techniques unless th e bromide concentration is equalized in the individual fractions.