Recent research has suggested that certain nitrogenous (N)-disinfection byproducts (DBPs) (e.g., HANs) and
certain non-regulated carbonaceous (C)-DBPs (e.g., HAs) may be of higher health concern than
the regulated C-DBPs (e.g., THMs, HAAs). The U.S. Environmental Protection
Agency's (USEPA's) Integrated Risk Information System (IRIS) database indicates that for eight
nitrosamines (including NDMA) drinking water concentrations in the low ng/L level are
associated with a 10-6 lifetime cancer risk. EfOM and AOM are sources of disinfection byproduct (DBP) precursors,
especially for N-DBPs. Thus, a survey was conducted to look at N-DBP formation and that of
selected C-DBPs at 16 DWTPs, with a focus on wastewater and algal impacted drinking water
supplies.
The authors conducted a full-scale survey of 16 U.S. drinking water treatment plants (DWTPs) in 2006 and/or 2007. Some
of the sites were sampled during an algal bloom event. In terms of the effluent-impacted sites,
they were sampled in the summer when river flow was low, as some streams can be more
effluent-impacted at this time of year. In some watersheds, a DWTP that was not algal or
wastewater impacted was sampled to provide a contrast. DWTPs were sampled that used a range
of treatment processes (coagulation, lime softening, ultrafiltration, filtration with granular
activated carbon) and disinfectants (chlorine, chlorine dioxide, chloramines, ozone, ultraviolet). The paper provides analytical parameters. Includes 28 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 790 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 11 |
| Published : | 11/01/2008 |
