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FORMATION OF HALONITROMETHANES IN DRINKING WATER DURING CHLORINATION
Citation:
Choi, J. AND S D. Richardson. FORMATION OF HALONITROMETHANES IN DRINKING WATER DURING CHLORINATION. Presented at 52nd American Society for Mass Spectrometry Conference, Nashville, TN, May 23-27, 2004.
Impact/Purpose:
(1) Use toxicity-based approach to identify DBPs that show the greatest toxic response. (2) Comprehensively identify DBPs formed by different disinfectant regimes for the 'Four Lab Study'. (3) Determine the mechanisms of formation for potentially hazardous bromonitromethane DBPs.
Description:
In addition to many other halogenated disinfection by-products (DBPs), a number of halonitromethanes including chlorinated, brominated, and mixed bromochlorinated nitromethanes, have been identified in drinking water. These halonitromethanes, especially the brominated ones, are more cytotoxic and mutagenic than most of the DBPs that are currently regulated in drinking water. In this work, gas chromatography (GC)/mass spectrometry (MS) was used to study the formation of halonitromethanes during the chlorination of laboratory prepared water. The effect of ozonation and elevated bromide concentration on halonitromenthane formation was also investigated.