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Main Title Factors Affecting Incorporation of Bromide into Brominated Trihalomethanes during Chlorination.
Author Amy, G. L. ; Chadik, P. A. ; Chowdhury, Z. K. ; King, P. H. ; Cooper, W. J. ;
CORP Author Environmental Protection Agency, Cincinnati, OH. Water Engineering Research Lab. ;Florida International Univ., Miami. ;Arizona Univ., Tucson.;Electric Power Research Inst., Palo Alto, CA.;National Cancer Inst., Bethesda, MD.
Year Published 1985
Report Number EPA/600/D-86/223;
Stock Number PB87-104568
Additional Subjects Chlorination ; Water treatment ; Chemical reactions ; Concentration(Composition) ; Chlorine ; Bromides ; pH ; Temperature ; Bromine ions ; Trihalomethanes ; Chemical reaction kinetics ; Precursor
Library Call Number Additional Info Location Last
NTIS  PB87-104568 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 12p
Nine natural waters were evaluated to define the effects of temperature, pH, chlorine dose, bromide ion concentration, precursor source and concentration, and reaction time on the formation of THM-Br and the related conversion of inorganic bromide to THM-Br. In THM formation a portion of the inorganic bromide ion concentration is converted to organically bound bromine in the three common brominated THM species. The percentage conversion (1) increases rapidly in the first stages of THM formation and approaches a plateau at longer reaction times; (2) increases with increasing pH and increasing temperature; (3) increases with chlorine concentration but approaches a plateau at high concentrations; (4) initially increases with Br(1-) concentration to a maximum percentage conversion and subsequently decreases at higher Br(1-) concentrations. It was difficult to define clear trends for the variation of percentage conversion with THM precursor source and concentration presumably because of multiplicative effects of variables as well as parameters such as ammonia concentration that were not examined in the study.