Provide PDF Format
AWWA WQTC69499
- Kinetics of Lead Release from Brass Water Meters and Faucets
- Conference Proceeding by American Water Works Association, 11/01/2008
- Publisher: AWWA
$12.00$24.00
As part of AwwaRF Project 3018, the release of Pb from new faucets and new and usedwater meters was measured. Data were obtained for brass compositions, scalecompositions, and water chemistry. Pb (or Bi) is present in these brasses as small"islands" of metal, whereas Cu and Zn are mixed in a solid solution. With time, the brassshows preferential loss of Zn relative to Cu. Lead releases from the faucets in 6 hourstagnation runs increased rather than decreased with time. This behavior is inconsistentwith formation of passivating scale layers, but is consistent with progressivedezincification producing a porous surface layer through which Pb can diffuse morerapidly, or from which Pb particulates can be detached more readily with time. The rateof Pb release was found to correlate inversely with the Zn/Cu ratio of the brass. Includes 11 references, tables, figures.
Related Products
AWWA ACE94135
Ultraviolet Degradation of N-Nitrosodimethylamine (NDMA) in the Ohsweken (Six Nations) Water Supply..
$12.00 $24.00
AWWA ACE70891
Converting from Granular Media Filtration to MF/UF Membranes: The Singaporean Way..
$12.00 $24.00
AWWA JAW46217
Journal AWWA - Protozoa in River Water: Sources, Occurrence, and Treatment..
$15.00 $30.00
