Formation and toxicity of brominated disinfection byproducts during chlorination and chloramination of water: a review

J Environ Sci Health B. 2014;49(3):212-28. doi: 10.1080/03601234.2014.858576.

Abstract

Disinfection byproducts (DBPs) in drinking water exhibit considerable adverse health effects; recent focus is on the brominated disinfection byproducts (Br-DBPs). The chlorination and chloramination of bromide ion containing water produce reactive bromo species, which subsequently react with natural organic matter (NOM) to yield Br-DBPs. The possible reactions involved in generating DBPs are presented. Identified Br-DBPs include bromomethanes, bromoacetic acid, bromoacetamides, bromoacetonitriles, and bromophenols. Mixed chloro- and bromo-species have also been identified. Pathways of the formation of Br-DBPs have been described. The concentration of Br- ion, pH, reaction time, and the presence of Cu(II) influence the yield of DBPs. The effects of water conditions on the production of Br-DBPs are presented. The epidemiological studies to understand the potential toxic effects of DBPs including Br-DBPs are summarized. Brominated DBPs may have higher health risks than their corresponding chlorinated DBPs. A potential role of an emerging alternate disinfectant, ferrate (FeV)O(2-)4), in minimizing DBPs is briefly discussed.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.
  • Review

MeSH terms

  • Disinfectants / chemistry*
  • Disinfectants / toxicity*
  • Halogenation
  • Humans
  • Water Pollutants, Chemical / chemistry*
  • Water Pollutants, Chemical / toxicity*
  • Water Purification / instrumentation*
  • Water Purification / methods

Substances

  • Disinfectants
  • Water Pollutants, Chemical