Formation of CNBr in O3/NH2Cl sequential disinfection

Hongxia Lei, Roger A. Minear, Benito J. Mariñas

Research output: Contribution to journalArticle

Abstract

The formation of CNBr appears to be a complex reaction in sequential disinfection treatment of drinking water with O3 and NH2Cl. Many parallel and cross-linked pathways may lead to the formation of CNBr. In simplified system containing HCHO, NH2Cl and Br the formations of CNBr and CNCl are competitive processes. High Br favors the formation of CNBr through reactions between HCHO and bromamines, CN- and bromamines, CN- and HOBr. NHClBr may also react with HCHO, in a similar way NHBr2 does, to form CNBr. Hydrolysis reactions in the pH range of 6 to 8 used in this study were found to be negligible over 24 hours period.

Original languageEnglish (US)
Pages (from-to)82-84
Number of pages3
JournalACS Division of Environmental Chemistry, Preprints
Volume40
Issue number2
StatePublished - Aug 20 2000

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Keywords

  • Cyanogen bromide
  • DBPs
  • Formaldehyde
  • Kinetics
  • Monochloramine
  • Ozone

ASJC Scopus subject areas

  • Chemical Engineering(all)

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