Predicting Hydroxyl Radical Activity and Trace Contaminants Removal in Ozonated Water

Abstract

There is a renewed interest in predicting R_CT following growing evidence that AOP is effective against many emerging contaminants. Five surface waters were investigated to evaluate the OH-radical activity using the R_CT concept, predict R_CT using traditional water quality characteristics and predict contaminants removal by ozonation and peroxone. It was shown that R_CT was dependent on water quality characteristics and could be modeled (R² = 0.92), using water characteristics and treatment conditions. Predictions of MIB oxidation closely matched the published data of Kawamura (2000) and bench-scale assays performed on one of the water under investigation.

Keywords:

• Ozone
• Advanced Oxidation Process (AOP)
• RCT
• Pollutant Removal
• p-Chlorobenzoic Acid (pCBA)

ACKNOWLEDGMENTS

This project was funded by the Industrial-NSERC Chair in Drinking Water supported by the City of Montreal, John-Meunier Inc. and the City of Laval. The authors also wish to acknowledge the help of Jacinthe Mailly and Julie Philibert for performing some of the routine analysis.