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DRINKING WATER QUALITY DETERIORATION IN DISTRIBUTION SYSTEMS: COLORED WATER FORMATION AND ITS CONTROL
Citation:
Lytle*, D A. AND V. L. Snoeyink. DRINKING WATER QUALITY DETERIORATION IN DISTRIBUTION SYSTEMS: COLORED WATER FORMATION AND ITS CONTROL. Presented at 2003 AWWA Distribution Systems Symposium Meeting, Portland, OR, 09/28/2003.
Description:
The release of iron from drinking water distribution systems is a common source of drinking water distribution system consumer complaints. Suspended iron particles result in colored (red) water and metallic tasting water. Iron release results from both physical and chemical mechanisms. In the case of chemical iron release, iron is released from corrosion scale and iron pipes in the reduced, and soluble Fe(II) form. Fe(II) is oxidized by oxygen or disinfectant in the bulk water to insoluble Fe(III) which readily forms red particles. The objective of this paper is to review the mechanism of chemical iron release as it relates to the properties and structure of iron corrosion scales. Secondly the effect of water chemistry on the properties of iron particles and suspensions that form following the oxidation of Fe(II) are reviewed