OLS : Record


Main Title Polyphosphate water-treatment products: their effects on the chemistry and solubility of lead in potable water systems {microform} /
Author Holm, Thomas R.; Smothers, S. H.; Xiaofeng, Z.; Schock, R. R.
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,
Place Published Cincinnati, OH :
Year Published 1991
Report Number EPA/600/D-91/057
Stock Number PB91-182709
OCLC Number 45702824
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
Library   Call Number Additional Info Location Date Modified
ERBD PB91-182709 NERL/ESD-LV Library/Las Vegas,NV 01/13/2001
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 p. : ill. ; 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. "
Supplementary Notes Presented at the Water Quality Conference held in Philadelphia, PA. on November 12-16, 1989. Prepared in cooperation with Illinois State Water Survey Div., Champaign.
Author Added Ent
Smothers, Sarah H.;
Xiaofeng, Zhu.
Corporate Au Added Ent Illinois. Dept. of Energy and Natural Resources. ; United States. Environmental Protection Agency. Office of Research and Development.
PUB Date Free Form 1991.
NTIS Prices PC A03/MF A01
BIB Level m
OCLC Time Stamp 20010111124247
Cataloging Source OCLC/T
Language eng
Origin OCLC
OCLC Rec Leader 01411nam 2200301Ka 45020