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OLS Field Name OLS Field Data
Main Title Polyphosphate water-treatment products : their effects on the chemistry and solubility of lead in potable water systems /
Author Holm, Thomas R. ; Smothers, S. H. ; Xiaofeng, Z. ; Schock, R. R.
Other Authors
Author Title of a Work
Smothers, Sarah H.
Xiaofeng, Zhu.
CORP Author Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab. ;Illinois State Water Survey Div., Champaign.
Publisher U.S. Environmental Protection Agency, Office of Research and Development, Risk Reduction Engineering Laboratory,
Year Published 1991
Report Number EPA/600/D-91/057
Stock Number PB91-182709
Additional Subjects Potable water ; Lead(Metal) ; Complex ions ; Mathematical models ; Water pollution ; Water chemistry ; Phosphorus polymers ; Water treatment ; Water softening ; Toxic substances ; Solubility ; Chemical equilibrium ; Plumbing ; Corrosion inhibitors ; Reprints
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB91-182709 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Edition "Contract report 579."
Collation 16 pages : illustrations ; 28 cm
Abstract
Three commercial polyphosphate-containing water treatment products were evaluated for their ability to affect lead solubility in drinking water. A 'Competing-Ligand Spectrophotometry' Technique was used to characterize Pb(2+) complexation at 20 degrees C in ionic strength of 0.1, pH = 8, and calcium concentration of .001 mol/L. The pH was buffered by HEPES, and the colorimetric reagent was 4-(2-pyridylazo)-resourcinol (PAR). Results were also compared to a DPASV method. The data was fit by a 2- ligand model. The experiments suggested a significant ability to enhance lead solubility by complexation at the pH and hardness tested.
Notes
"Michael R. Schock, project officer." "EPA/600/D-91/057." "Published in the Water Qaultiy Technology Congerence, Philadelphia, PA, November 12-16, 1989, pp: 511-523." Microfiche.
Contents Notes
EPA/600/D-91/057.