Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Effect of Cyanuric Acid, a Chlorine Stabilizer, on Trihalomethane Formation.
Author Feldstein, C. M. ; Rickabaugh, J. ; Miltner, R. J. ;
CORP Author Municipal Environmental Research Lab., Cincinnati, OH. ;Cincinnati Univ., OH. Dept. of Civil and Environmental Engineering.
Year Published 1984
Report Number EPA-600/D-84-167;
Stock Number PB84-209105
Additional Subjects Water treatment ; Disinfectants ; Potable water ; Stability ; Chlorination ; Rivers ; Filtration ; Chemical treatment ; Halomethanes ; Cyanuric acid
Library Call Number Additional Info Location Last
NTIS  PB84-209105 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 22p
Cyanuric acid, used commonly in swimming pools to stabilize chlorine, was investigated in an attempt to control trihalomethane (THM) formation in filtered river water. At 7.5:1 molar ratio, applied cyanuric acid to applied chlorine, THM formation was reduced by 29 per cent. The reduction diminished with decreasing molar ratio and increasing pH, both of which promoted higher free chlorine residuals. A model was employed to differentiate between free chlorine and chlorinated isocyanurates. At 7.5:1 in bromide-spiked water, THM formation was reduced only 9 per cent and formation of brominated THM species was favored; increasing molar ratio favored increasing bromoform formation. The data could be explained, in part, by the classical haloform reaction. Cyanuric acid probably holds little promise for THM control in drinking water treatment.