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 |
|
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 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
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. |
Place Published |
Cincinnati, OH : |
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. |
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 |
Cataloging Source |
OCLC/T |
OCLC Time Stamp |
20010111124247 |
Language |
eng |
Origin |
NTIS |
Type |
MERGE |
OCLC Rec Leader |
01411nam 2200301Ka 45020 |