Record Display for the EPA National Library Catalog


Main Title Ozonation/Post-Chlorination of Humic Acid: A Model for Predicting Drinking Water Disinfection By-Products.
Author Coleman, W. E. ; Munch, J. W. ; Ringhand, H. P. ; Kaylor, W. H. ; Mitchell., D. E. ;
CORP Author Health Effects Research Lab., Research Triangle Park, NC. Environmental Toxicology Div.
Publisher c1992
Year Published 1992
Report Number EPA/600/J-92/163;
Stock Number PB92-180280
Additional Subjects Potable water ; Water pollution detection ; Humic acids ; Byproducts ; Water treatment ; Water analysis ; Chlorination ; Ozonation ; Chemical reactions ; Gas chromatography ; Mutagens ; Concentration(Composition) ; Distillation ; Sample preparation ; Chemical analysis ; Mass spectroscopy ; Disinfection ; Experimental design ; Organic matter ; Natural emissions ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB92-180280 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 20p
Experiments were performed to evaluated disinfection by-products in model humic acid solutions which were ozonated at three different ozone to carbon levels and then chlorinated. These experiments were conducted in order to help understand whether the ozone/post-chlorination process alters the amount and type of mutagenic by-products formed, from these produced by chlorination of humic acid alone. Disinfection by-products were identified by gas chromatography/mass spectrometry (GC/MS). Samples of clarified and sand-filtered Mississippi River water at a pilot-scale drinking water treatment plant in Jefferson Parish, Louisiana, that were ozonated and post-disinfected with chlorine, also were analyzed by GC/MS. A comparison of the by-products in the pilot plant study versus those in the laboratory study showed that similar compounds were produced. The effect of bormide ion in the pilot plant water on by-product formation also is discussed.