Provide PDF Format
AWWA WQTC52971
- Effect of Phosphate Inhibitors on Lead Release From Pipes
- Conference Proceeding by American Water Works Association, 01/01/2000
- Publisher: AWWA
$12.00$24.00
Hexametaphosphate tends to increase release of both particulate and soluble leadto drinking water. For every mg/L of residual hexametaphosphate, soluble leadincreases by about 1.6-2.5 mg/L after 72 hours of stagnation in pure lead pipescompared to the same condition dosed with orthophosphate. Utilities shouldconsider these adverse effects whenever polyphosphate is used to prevent scalingor iron precipitation; in fact, polyphosphates cannot be recommended for leadcorrosion control. Though soluble lead release was in reasonable agreement withpredictions of solubility models, particulate lead release was dominant in theseexperiments. In some cases, a peak in lead release was observed with increasingstagnation time in pipes--analysis of that data indicated that particulate leadcan re-attach to the pipe surface under at least some circumstances. Includes 22 references, tables, figures.
Related Products
AWWA DSS71306
Determining Free Chlorine in the Presence of Manganese and Chloramines..
$12.00 $24.00
AWWA ACE58133
An Examination of Sonication Technology for Inactivation of MS2 Coliphage..
$12.00 $24.00
AWWA WQTC50374
Prediction of Optimal Coagulant Dosage in a Water Treatment Plant Using Neural Networks..
$12.00 $24.00
AWWA SOURCES66712
Public Involvement and the Role it Plays in Integrated Water Resources Planning..
$12.00 $24.00