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FORMATION OF HALONITROMETHANES IN DRINKING WATER
Citation:
Choi, J. AND S D. Richardson. FORMATION OF HALONITROMETHANES IN DRINKING WATER. Presented at American Water Works Association Water Quality Technical Conference, San Antonio, TX, November 14-18, 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, GC/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 halonitromethane formation was investigated.