Effect of Calcium on Lead in Soft-Water Distribution Systems
Publication: Journal of Environmental Engineering
Volume 126, Issue 5
Abstract
Meeting the lead rule action level for drinking water can be difficult for soft-water systems. One concern in these systems is the formation of particulate or colloidal lead that is difficult to remove from the aqueous phase. In this preliminary study, batch and pipe-loop systems are used to assess the effect of calcium addition on lowering the concentration of particulate or colloidal lead. The addition of calcium at levels as low as 5 mg/L reduced zeta potential of lead-bound colloids and in some cases resulted in a reduction of total Pb concentration.
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References
1.
Amirtharajah, A., and O'Melia, C. R. (1990). “Coagulation processes: Destabilization, mixing and flocculation.” Water quality and treatment, F. W. Pontius, ed., McGraw-Hill, New York, 269–365.
2.
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 Resour., 21(1), 83–97.
3.
Driscoll, C. T., and Newton, R. M. (1985). “Chemical characteristics of Adirondack lakes.” Envir. Sci. Technol., 24(11), 1018–1024.
4.
Hulsmann, A. D. (1990). “Particulate lead in water supplies.” J. Inst. Water and Envir. Mgmt., 4, 19–25.
5.
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.
6.
Lee, R. G., Becker, W. C., and Collins, D. W. (1989). “Lead at the tap: Sources and control.” J. AWWA, 81(7), 52–62.
7.
Nassar, I. S. ( 1994). “Reduction of lead and copper concentrations in drinking water through pH-alkalinity adjustments,” MS thesis, Cornell University, Ithaca, N.Y.
8.
Schock, M. R. (1980). “Response of lead solubility to dissolved carbonate in drinking water.” J. AWWA, 72(12), 695–704.
9.
Schock, M. R. (1989). “Understanding corrosion strategies for lead.” J. AWWA, 81(7), 88–100.
10.
Schock, M. R., and Gardels, M. C. (1983). “Plumbosolvency reduction by high pH and low carbonate-solubility relationships.” J. AWWA, 75(2), 87–91.
11.
Standard methods for the examination of water and wastewater. (1992). 18th Ed., American Public Health Association (APHA), Washington, D.C.
12.
Twedt, A. M. ( 1996). “The effects of pipe flowrate, pH and calcium concentration on total and colloidal lead in drinkin water distribution systems,” MS thesis, Cornell University, Ithaca, N.Y.
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Received: Jul 21, 1998
Published online: May 1, 2000
Published in print: May 2000
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