Reactivity of Disinfection By-Products with Distribution System Pipe Deposits and Cast Iron

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Project Period: 
Project Investigator(s): 
R Valentine, M Scherer, Department of Civil and Environmental Engineering, University of Iowa

This project will investigate reactions that could potentially reduce Disinfection By-Products (DBPs) in distribution systems. The researchers hypothesize that the dominant abiotic loss pathways involve reactions with pipe deposit material and with nascent cast iron, especially under reduced conditions. The objective of this research is to characterize the reactivity of selected DBPs with model and collected pipe deposit material, and with cast iron. A special emphasis will be on reactions with unidentified organic halide containing compounds, referred to as unidentified Total Organic Halogen uTOX. This material generally accounts for over 75% of the total halogen incorporated into organic matter.


Vikesland PJ, Valentine RL; Iron oxide surface-catalyzed oxidation of ferrous iron by monochloramine: implications of oxide type and carbonate on reactivity. Environ Sci Technol. 2002; 36(3):512-519