Copper corrosion in potable water systems: Impacts of natural organic matter and water treatment processes
- Camp, Dresser, McKee Inc., Denver, CO (United States)
- Univ. of Colorado, Boulder, CO (United States). Dept. of Civil, Environmental, and Architectural Engineering
Copper corrosion was examined in the presence of natural organic matter (NOM) and in situations where NOM was altered by drinking water treatment. Corrosion rates (i{sub corr}) increased with higher NOM concentration at pH 6, whereas insignificant effects were observed at pH 7.5 and 9.0. Corrosion byproduct release was affected adversely by 4 mg/L NOM at pH 6.0, 7.5 and 9.0, with soluble copper increasing by 0.6 mg/L to 0.7 mg/L when compared to solutions without NOM. Alum-coagulated waters had higher i{sub corr} than untreated waters, but ferric chloride (FeCl{sub 3}{center_dot}6H{sub 2}O)-coagulated waters exhibited reduced i{sub corr}. This difference was attributed to the relative effects of added sulfate via alum coagulation vs added chloride via FeCl{sub 3}{center_dot}6H{sub 2}O coagulation. The effect of combined treatment (alum coagulation, ozonation, and granular activated carbon) was similar to that using alum coagulation alone.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 218589
- Journal Information:
- Corrosion, Journal Name: Corrosion Journal Issue: 4 Vol. 52; ISSN 0010-9312; ISSN CORRAK
- Country of Publication:
- United States
- Language:
- English
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