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This article describes a laboratory study which was conducted to test the leachability of regulated metals from cement-mortar linings inside drinking water pipes. This study had four specific objectives, which were: to determine whether metals from the cement-mortar linings were leaching into the first fill of pipe water (after pipe disinfection) held in a static, pressurized condition; to find out whether metals were leaching from the linings under conditions of exposure of lining to chlorinated water during pipe disinfection, exposure of lining to fresh refills of faucet water, and exposure of lining to refills with soft water; to ascertain which environments promoted leaching; and, to determine what recommendations, if any, should be made to the water industry based on comparisons of the concentrations of metals in the pipe water with current drinking water standards. Faucet water of known quality was introduced in the test pipes and maintained in static, pressurized conditions for extended periods of time. Water samples were frequently drawn from the pipes and tested for metals and other water quality parameters during the test periods. Results of the study are discussed. Includes 20 references, tables, figures.

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Edition: Vol. 90 - No. 3 Published: 03/01/1998 Number of Pages: 12File Size: 1 file , 770 KB