The impact of different ultraviolet (UV) technologies combined with H2O2 irradiation on disinfection
byproduct (DBP) formation was investigated using a broad range of UV doses. Four classes of
DBPs (THMs, HAAs, aldehydes and carboxylic acids) were examined. This enabled the
determination of effects resulting from the action of a UV-based Advanced Oxidation
Technology (AOT; UV/H2O2 oxidation) on natural organic matter (aldehydes, carboxylic acids)
as well as effects on the ultimate formation of chlorinated DBPs (THMs and HAAs) from
secondary chlorination. For doses of less than 500 mJ/cm2, UV/H2O2 oxidation did not
significantly affect THM and HAA formation in subsequent chlorination processes, however
higher UV doses resulted in much lower ultimate concentrations of THMs and HAAs
(approximately 50% lower). UV/H2O2 oxidation also resulted in the formation of aldehydes and
carboxylic acids at UV doses above 500 mJ/cm2, compounds that are known to adversely effect
drinking water biostability. Compared to UV irradiation alone at similar doses, UV/H2O2
oxidation had a more significant impact on DBP formation.
Includes 24 references, table, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 300 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 10 |
| Published : | 11/01/2002 |
