Pilot-Scale Verification and Analysis of Iron Release Flux Model
Publication: Journal of Environmental Engineering
Volume 133, Issue 2
Abstract
An original model by Mutoti in 2003 was developed mathematically, and empirically, to predict the increase in total iron concentration in distribution systems. This model, referred to as a flux model, relates the increase in iron concentration in a reach of unlined or galvanized iron pipe to the surface area of the pipe in contact with the water. A flux term, defined with a dimension of mass per area per time was used. The effects of water chemistry, pipe material and hydraulic conditions were incorporated into the flux term. This paper describes the verification of the flux model using independent pilot data obtained with variable water quality under worst case, laminar flow conditions. The original model accurately predicted iron release for this independent verification data, with an overall of 0.80. For laminar flow conditions, the increase in iron concentration is proportional to the flux and the hydraulic residence time, and is inversely proportional to the pipe diameter.
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Acknowledgments
The writers specially acknowledge Chris Owen, Tampa Bay Water Quality Assurance Officer, who was the TBW Project Coordinator, and Roy Martinez, AWWA Research Foundation Senior Account Officer, who was the AwwaRF Project Officer, and the following Member Governments: Pinellas County, Hillsborough County, Pasco County, Tampa, St. Petersburg, and New Port Richey. Pick Talley, Robert Powell, Dennis Marshall and Oz Wiesner from Pinellas County, and Dr. Luke Mulford from Hillsborough County are also specifically recognized for their contributions. Several UCF Environmental Engineering students and faculty also contributed significantly to this project and are recognized for their efforts.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 133 • Issue 2 • February 2007
Pages: 173 - 179
Copyright
© 2007 American Society of Civil Engineers.
History
Received: Aug 6, 2004
Accepted: Jul 25, 2006
Published online: Feb 1, 2007
Published in print: Feb 2007
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