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AWWA WQTC60670

AWWA WQTC60670 Kinetics and Mechanisms of Bromophenols Formation During Water Chlorination: A Predictive Tool for Taste and Odor Development

Conference Proceeding by American Water Works Association, 11/15/2004

Acero, Juan L.; Piriou, Philippe; von Gunten, Urs

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The objective of this study was to describe the complex chemistry of theformation of chloro- and bromophenols during the chlorination of bromide- and phenol-containingwaters in order to define conditions that promote the formation of critical products(2-bromophenol and 2,6-dibromophenol) under realistic drinking water treatment conditions.Experimental approach is based on: a critical evaluation and compilation of existing second-orderrate constants for HOX-phenol reactions; determination of unknown second-order rateconstants for reactions of HOCl and HOBr with phenolic compounds over a wide pH range;quantification of product distribution of the formed halophenols; and, formulation of akinetic model. This kinetic model enables us to investigate the influence of some waterquality parameters such as the concentration of phenol, ammonia, bromide and the pH on theproduct distribution. Includes 7 references, table, figures.

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