Importance of Pb and Cu Particulate Species for Corrosion Control
Publication: Journal of Environmental Engineering
Volume 130, Issue 2
Abstract
This paper examines the important, and oftentimes dominant, role of particles in lead and copper corrosion by-product release from stagnant pipes. For copper pipes, orthophosphate generally reduced soluble copper levels compared to pipes with no inhibitor but had little effect on particulate copper, while pipes dosed with polyphosphate generally had higher levels of particulate copper, probably due to the formation of a less durable copper–phosphate solid. For lead, the vast majority of lead by-products were particulate, and particulate release in low pH and low alkalinity waters was associated with hydrocerrusite scales. Orthophosphate and polyphosphate tended to decrease particulate lead species, possibly due to the formation of a lead–phosphate solid. For both lead and copper pipes, zinc orthophosphate did not show any significant advantages compared to orthophosphate alone, generally due to the increased release of particulate lead or copper species which may be associated with a zinc–phosphate precipitate. Finally, the occurrence of particulate and colloidal species, especially lead, was confirmed by utility tap water sampling.
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References
American Water Works Association Research Foundation, and DVGW-Technologiezentrum Wasser. (1996). Internal corrosion of water distribution systems, American Water Works Association, Denver.
APHA, AWWA, and WEF. (1998). Standard methods for the examination of water and wastewater, 20th ed., APHA, Washington, D.C.
Bisogni, J. J., Jr., Nassar, I. S., and Menegaux, A. M.(2000). “Effect of calcium on lead in soft-water distribution systems.” J. Environ. Eng., 126(5), 475–478.
De Mora, S. J., Harrison, R. M., and Wilson, S. J.(1987). “The effect of water treatment on the speciation and concentration of lead in domestic tap water derived from a soft upland source.” Water Res., 21(1), 83–94.
Dodrill, D. M., and Edwards, M.(1995). “Corrosion control on the basis of utility experience.” J. AWWA 87(7), 74–85.
Edwards, M., Hidmi, L., and Gladwell, D.(2002). “Phosphate inhibition of soluble copper corrosion by-product release.” Corros. Sci., 44(5), 1057–1071
Edwards, M., Jacobs, S., and Taylor, R. M.(2000). “The blue water phenomenon.” J. AWWA 92(7), 72–82.
Edwards, M., and McNeill, L. S.(2002). “Effect of phosphate inhibitors on lead release from pipes.” J. AWWA 94(1), 79–90.
Edwards, M., McNeill, L. S., Holm, T. R., and Lawrence, M. C. (2001a). “Role of phosphate inhibitors in mitigating lead and copper corrosion.” Rep. No. 90823, AWWARF, Denver.
Edwards, M., Powers, K., Hidmi, L., and Schock, M. R.(2001b). “The role of pipe aging in copper corrosion by-product release.” Water Sci. Technol., 1(3), 25–32.
Edwards, M., Schock, M., and Meyer, T.(1996). “ alkalinity, and copper corrosion by-products.” J. AWWA 88(3), 81–94.
Gregory, R. (1992). “Lead: A source of contamination of tap water.” Proc., Corrosion and Related Aspects of Materials for Potable Water Supplies, The Institute of Materials, London, UK.
Hulsmann, A. D.(1990). “Particulate lead in water supplies.” J. Inst. Water Environ. Management, 4(1), 19–25.
Kuennen, R. W., Taylor, R. M., Van Dyke, K., and Groenevelt, K. (1992). “Removing lead from drinking water with a point-of-use GAC fixed-bed adsorber.” J. AWWA 84(2), 91–101.
Lind Johansson, E. (1989). “Importance of water composition for prevention of internal copper and iron corrosion,” PhD Dissertation, Department of Sanitary Engineering, Chalmers University of Technology, Goteborg, Sweden.
McNeill, L. S., and Edwards, M.(2002). “Phosphate inhibitor use at U.S. utilities.” J. AWWA 94(7), 57–63.
Schecher, W. D., and McAvoy, D. C. (1998). “: A chemical equilibrium program for personal computers, Version 4.0.” Environmental Research Software, Hallowell, Me.
Schock, M. R. (1999). Water quality and treatment, 5th ed., R. D. Letterman, Ed., McGraw-Hill, New York.
Schock, M. R., Lytle, D. A., and Clement, J. A. (1995). “Effect of DIC, orthophosphate and sulfate on drinking water cuprosolvency.” Rep. No. EPA/600/R-95/085, U.S. EPA, Washington, D.C.
Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 130 • Issue 2 • February 2004
Pages: 136 - 144
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: Sep 18, 2001
Accepted: Jan 22, 2003
Published online: Jan 16, 2004
Published in print: Feb 2004
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