Title

Pilot-scale verification and analysis of iron release flux model

Authors

Authors

G. Mutoti; J. D. Dietz; S. A. Imran; N. Uddin;J. S. Taylor

Comments

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Abbreviated Journal Title

J. Environ. Eng.-ASCE

Keywords

WATER DISTRIBUTION-SYSTEMS; CORROSION; PIPE; Engineering, Environmental; Engineering, Civil; Environmental Sciences

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 R-2 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.

Journal Title

Journal of Environmental Engineering-Asce

Volume

133

Issue/Number

2

Publication Date

1-1-2007

Document Type

Article

Language

English

First Page

173

Last Page

179

WOS Identifier

WOS:000243546900008

ISSN

0733-9372

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