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EVALUATION OF ION EXCHANGE SOFTENING ON THE LEACHING OF METALS FROM HOUSEHOLD PLUMBING SYSTEMS
Citation:
Sorg, T., D. Lytle, AND M. Schock. EVALUATION OF ION EXCHANGE SOFTENING ON THE LEACHING OF METALS FROM HOUSEHOLD PLUMBING SYSTEMS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/A-95/100 (NTIS PB95253142), 1995.
Description:
A 16 month pilot plant study was conducted to determine the effect of ion exchange softening on the leaching of metals from household plumbing materials. wo pipe loop pilot plant systems were assembled. ach system consisted of duplicate loops of lead pipe, copper pipe with 50:50 lead-tin soldered joints, copper tubing, galvanized pipe, and brass faucets. he source water had a pH of about 9 and a hardness of about 160 mg/L as CaCO3. ne system (control) was fed non-softened water and the second system (test) ion exchange softened water. ater samples were collected from each loop, twice a week, for 16 months. he metal leaching results of lead, copper, and zinc indicated that there was no consistent pattern of higher metal levels from the softened water leading to the general conclusion that the softened water was not more corrosive to the plumbing materials than the non-softened water with the water quality used for this study.
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EVALUATION OF ION EXCHANGE SOFTENING ON THE LEACHING OF METALS FROM HOUSEHOLD PLUMBING SYSTEMS