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Bromine Incorporation in Regulated and Emerging DBPs and the Relative Predominance of Mono-, Di-, and Trihalogenated DBPs
Citation:
Krasner, S. W., T. Lee, R. Chinn, H. Weinberg, N. Bodin, S. D. RICHARDSON, J. G. PRESSMAN, T. F. SPETH, R. J. MILTNER, AND J. E. SIMMONS. Bromine Incorporation in Regulated and Emerging DBPs and the Relative Predominance of Mono-, Di-, and Trihalogenated DBPs. Presented at AWWA Water Quality Technology Conference and Exposition, Cincinnati, OH, November 16 - 20, 2008.
Impact/Purpose:
The primary objective of this presentation is an examination of bromine incorporation in emerging DBPs versus that of the regulated DBPs and a secondary objective is the study of the predominance of di- versus trihalogenated species in these different DBP classes, in order to better understand and characterize exposure to DBPs of health concern.
Description:
Brominated disinfection by-products (DBPs) (in general) appear to be more cytotoxic and genotoxic than the chlorinated species, and some of the dihalogenated species are more toxic than the trihalogenated analogues; however, many of the more toxic species are not routinely measured. The primary objective of this presentation is an examination of bromine incorporation in emerging DBPs versus that of the regulated DBPs and a secondary objective is the study of the predominance of di- versus trihalogenated species in these different DBP classes, in order to better understand and characterize exposure to DBPs of health concern. Occurrence data on emerging halogenated DBPs of health concern from nationwide studies are being evaluated. Specific DBPs that are being studied include 4 regulated trihalomethanes (THMs), 9 bromine- and chlorine-containing haloacetic acids (HAAs), 2 mono- and 3 dihaloacetonitriles (HANs), 3 dihalo- and 4 trihalonitromethanes (HNMs), 3 dihalo- and 4 trihaloacetaldehydes (HAs), and selected bromine- and chlorine-containing haloketones and haloacetamides.