Evaluation of bromate formation and ozone decomposition kinetics

Paul Westerhoff; Gary Amy; Rengao Song; Roger Minear

doi:10.4324/9781315141350

Evaluation of bromate formation and ozone decomposition kinetics

Paul Westerhoff, Gary Amy, Rengao Song, Roger Minear

Engineering, Ira A. Fulton Schools of (IAFSE)

Research output: Chapter in Book/Report/Conference proceeding › Chapter

1 Scopus citations

Abstract

The rate of ozone decomposition Controls the yield of bromate and is influenced by water quality characteristics and water treatment parameters. Hypobromite ion (OBr⁻) and hydroxyl (HO) radical concentrations affect the extent and rate of bromate formation as well, Through the use of butanol as an HO radical scavenger, delineation of indirect HO radical and direct molecular ozone oxidation pathways are inferred. Approximately 75% of the bromate formation is controlled by HO radical mechanisms, while the remain- der forms via molecular ozone mechanisms alone. Oxidation of bromine appears to be a criticai oxidation step in either pathway.

Original language	English (US)
Title of host publication	Disinfection by-Products in Water Treatment
Subtitle of host publication	The Chemistry of their Formation and Control
Publisher	CRC Press
Pages	255-281
Number of pages	27
ISBN (Electronic)	9781351454858
ISBN (Print)	9781566701365
DOIs	https://doi.org/10.4324/9781315141350
State	Published - Jan 1 2017

ASJC Scopus subject areas

General Engineering
General Environmental Science

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AB - The rate of ozone decomposition Controls the yield of bromate and is influenced by water quality characteristics and water treatment parameters. Hypobromite ion (OBr−) and hydroxyl (HO) radical concentrations affect the extent and rate of bromate formation as well, Through the use of butanol as an HO radical scavenger, delineation of indirect HO radical and direct molecular ozone oxidation pathways are inferred. Approximately 75% of the bromate formation is controlled by HO radical mechanisms, while the remain- der forms via molecular ozone mechanisms alone. Oxidation of bromine appears to be a criticai oxidation step in either pathway.

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Evaluation of bromate formation and ozone decomposition kinetics

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