Disinfectants in drinking water can interact with natural organic matter (NOM) to form
disinfection by-products (DBPs). Halogenated furanones (including MX and MCA) are a
group of emerging DBPs that can account for a significant amount of the total mutagenicity
found in drinking water. Source water characteristics and NOM removal capabilities of
coagulation can greatly influence the formation of DBPs. This project examines the effects of
bench scale coagulation and chlorination tests on NOM removal, DBP formation, and
genotoxicity. NOM was characterized using liquid chromatography-organic carbon detection
(LC-OCD).
Experiments with Ottawa River, Otonabee River, and Lake Simcoe waters show that DBPs
decreased with increases in coagulant dosage, due to the removal of NOM during
coagulation. DBP formation and speciation was then compared with NOM content to identify
specific fractions that contribute to the formation of these DBPs. Genotoxicity was directly
linked to MX presence in chlorinated waters.
| Identifer | oai:union.ndltd.org:TORONTO/oai:tspace.library.utoronto.ca:1807/35704 |
| Date | 17 July 2013 |
| Creators | Zheng, Dana |
| Contributors | Andrews, Robert C., Andrews, Susan |
| Source Sets | University of Toronto |
| Language | en_ca |
| Detected Language | English |
| Type | Thesis |
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