Pilot-scale verification and analysis of iron release flux model

    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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