More and more utilities are using chloramines in place of free chlorine because of their greater
stability for better compliance with both the Total Coliform Rule and more stringent
requirements of the Disinfectants/Disinfection Byproducts Rule. New information about
disinfectant-induced changes in oxidation reduction potential (ORP), lead chemistry, scale
formation and interactions with natural organic matter have contributed to greater understanding
of the factors influencing increased corrosion and metals release associated with a change in
disinfectant. This paper provides a brief overview of Pb(IV) theoretical considerations as applied
to metals release in the distribution system. In addition, this paper provides preliminary data and
information based on ongoing laboratory and field studies aimed at understanding the impact of a
change in disinfectant on lead, brass, and copper components in the distribution system. Results
from this study will be of interest to utilities that are considering converting from free chlorine to
chloramines, and/or utilities concerned with maintaining simultaneous compliance with the Lead
and Copper Rule and the Stage 2 D/DBPR. Includes 29 references, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 2 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 40 |
| Published : | 06/01/2007 |
