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Copper release in low and high alkaline water.
L D'Antonio1, M Fabbricino, M Nasso
1University of Naples Federico II, Department of Hydraulic, Geotechnical and Environmental Engineering, Naples, Italy.
Environmental Technology
|July 16, 2008
Summary
Copper release from household plumbing into drinking water was studied. Copper concentration depends on water alkalinity, but total metal release is linked to stagnation time, not alkalinity.
Area of Science:
- Environmental Science
- Materials Science
- Water Chemistry
Background:
- Electrochemical corrosion of household plumbing systems releases copper into drinking water.
- Copper contamination in drinking water poses health risks and affects water quality.
- Understanding copper release mechanisms is crucial for ensuring safe drinking water.
Purpose of the Study:
- To investigate copper release from distribution systems into drinking water.
- To determine the influence of water alkalinity and stagnation time on copper release.
- To quantify both soluble and insoluble copper compounds formed during corrosion.
Main Methods:
- Conducted experiments with low and high alkaline water under stagnant conditions.
- Varied stagnation times to assess their impact on copper release.
- Quantified soluble and insoluble copper compounds using established experimental procedures.
Main Results:
- Copper concentration in stagnant water was found to be a function of water alkalinity.
- Total copper release was determined to be dependent on stagnation length.
- Water alkalinity did not affect the total amount of copper released.
Conclusions:
- Water alkalinity is a key factor controlling dissolved copper levels in stagnant drinking water.
- Stagnation time is the primary determinant of total copper release, irrespective of water alkalinity.
- Findings provide insights into managing copper contamination in household water distribution systems.
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