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Controlling Copper Corrosion in New Construction by Organic Matter Removal (PDF)

  • Author(s): Arnold, Roger B., Jr.; Griffin, Allian; Edwards, Marc
  • Publications: Journal - American Water Works Association
  • Issue Date: May 2012
  • Volume / Number: 104, Number 5
  • Page(s): E310-E317
  • DOI:
  • Product Number: JAW_0076010
Full Text: pdf
Expanded Summary: pdf

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A new elementary school with persistent elevated copper corrosion byproduct release evaluated pH increase, orthophosphate dosing, and granular activated carbon (GAC) treatment as potential corrosion control measures using bench-scale experiments. Removal of natural organic matter (NOM) with temporary GAC treatment facilitated the formation of a copper scale with a permanently diminished (> 85%) solubility via an accelerated natural scale-aging process. Increasing the pH and adding a high dose of orthophosphate were also effective for decreasing copper release but presented significant long-term drawbacks, and their benefits were reversed if the treatments were discontinued. Temporary GAC treatment may be a holistically attractive option to reduce copper corrosion problems in new construction in certain waters with high levels of NOM.

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