Journal Guest: Limited access

Expanded Summary -- Control of New Copper Corrosion in High-Alkalinity Drinking Water

  • Author(s): Grace, Stephen; Lytle, Darren A.; Goltz, Mark N.
  • Publications: Journal - American Water Works Association
  • Issue Date: January 2012
  • Volume / Number: 104, Number 1
  • Page(s): 39-40
  • DOI: http://dx.doi.org/10.5942/jawwa.2012.104.0002
  • Product Number: JAW_0076858
Full Text: pdf

Non-Member Price: $30
Free Download -- a benefit for AWWA members (login required)

Abstract

Research and field experience have shown that high-alkalinity waters can be associated with elevated copper levels in drinking water. The objective of this study was to document the application of orthophosphate (PO4) to the distribution system of a building with a copper problem associated with high-alkalinity source water. The alkalinity and pH of the water were 273 mg/L calcium carbonate and 7.4, respectively, and copper levels at taps ranged from 1.4 to 2.4 mg/L. Experimental bench-scale jar tests proved to be useful for establishing an appropriate orthophosphate dose. A simple chemical feed system delivered orthophosphate to the building at a dose of approximately 3 mg/L PO4. Within several weeks, copper levels throughout the building dropped below the Lead and Copper Rule copper action level of 1.3 mg/L. Orthophosphate levels remained consistent across the building and did not change during stagnation. The addition of orthophosphate also increased the chlorine residuals of flushed water samples.

AWWA Members

Download the online article for free (login required).

Non Members

Select ADD TO CART to purchase the article (login required) or select JOIN AWWA and enjoy the benefits of membership, including accessing this article for free.

Join AWWA | Login [ADDTOCARTBUTTON]
Ok
Advertise With Us