ENVR 265 |
| Previous studies showed that temperature and total organic carbon in drinking water cause ClO2 loss in a distribution system. In this study, the corrosion scales from a galvanized iron pipe and a copper pipe were characterized and evaluated for their impact on ClO2 decay in de-ionized water in a batch reactor and in a specially designed reactor made from iron and copper pipes. Goethite and magnetite were the main components of the iron corrosion scale and cuprite was the major component of the copper corrosion scale. The reaction rate of ClO2 with iron oxides followed a first-order kinetics with a rate constant ranging from 0.025-0.083 1/min. The decay rate constant for ClO2 reaction with copper oxides ranged from 0.0052-0.0062 1/min. This study reveals that the corrosion scale cause much more significant ClO2 loss in the distribution system than the total organic carbon that may be present in finished water. |
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Advances in Drinking Water Disinfection and Disinfection Byproduct Management
6:00 PM-8:00 PM, Wednesday, April 9, 2008 Morial Convention Center -- Hall A, Poster
Division of Environmental Chemistry |