A significant fraction of the total organic halogen
(TOX) in drinking water cannot be accounted for by
known specific disinfection byproducts (DBPs). Extensive
studies have been conducted to investigate factors
affecting the formation of trihalomethanes and
haloacetic acids, the two groups of regulated DBPs.
However, the formation and control of the other,
unidentified halogenated DBPs, which may have
potential health risks, have not been well studied.
This research evaluated the effect of reaction time,
pH, dosage, and temperature on the formation of
unknown TOX (UTOX) during chlorination and chloramination.
Results showed that the formation of
unknown DBPs significantly decreased as chlorination
or chloramination pH increased. Greater conversion of
UTOX to measurable byproducts occurred with
increasing reaction time, pH, dosage, and temperature
during chlorination. The UTOX-to-TOX ratio
increased with reaction time but decreased with pH
and dosage during chloramination.
Study results can help water suppliers better control
the formation of unknown DBPs as well as regulated
DBPs, thus reducing health risks associated with halogenated
DBPs in drinking water. Includes 31 references, table, figures.
| Edition : | Vol. 100 - No. 8 |
| File Size : | 1
file
, 1 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 14 |
| Published : | 08/01/2008 |
