Influence of carbonate on the ozone/hydrogen peroxide based advanced oxidation process for drinking water treatment
The influence of carbonate on the ozone/hydrogen peroxide process has been investigated. Carbonate radicals, which are formed from the reaction of bicarbonate/carbonate with OH radicals, act as a chain carrier for ozone decomposition due to their reaction with hydrogen peroxide. The efficiency of bicarbonate/carbonate as a promoter for the radical-based chain reaction in presence of hydrogen peroxide has been calibrated and compared to a well-known chain promoter (methanol) and an inhibitor (tert-butanol). Relative to tert-butanol, the hydrogen peroxide induced ozone decomposition is accelerated by bicarbonate/carbonate. Relative to methanol, bicarbonate/carbonate in presence of hydrogen peroxide is less effective as a promoter under comparable experimental conditions.
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Keywords: ozone ; ozone decomposition ; AOPs ; hydroxyl radical oxidation capacity ; carbonate radical ; hydrogen peroxide consumption ; drinking water ; advanced oxidation ; Dissociating Organic-Compounds ; Bromide-Containing Waters ; Rate Constants ; Ozone Decomposition ; Hydrogen-Peroxide ; Aqueous-Solution ; Inorganic-Compounds ; Hydroxyl Radicals ; Bromate Formation ; Pulse-Radiolysis
Record created on 2011-07-01, modified on 2016-08-09