The treatment procedures aimed at producing drinking water induce major modifications
on the properties of natural organic matter (NOM). A better knowledge of the fate of
NOM within distribution systems can be valuable information for utilities that practice
re-chlorination and for large systems where residence time of water is high. The aim of
this investigation is to characterize the reactivity of DBP precursors occurring in water
distribution systems by demonstrating the temporal and spatial evolution of the
organic matter (OM). For example, four points of the distribution system of
Quebec City (Canada) water utility were selected for the collection of data. The applied
strategy allows for an evaluation of the impact of residence time on the formation of
DBPs and on the changes of OM throughout the pipes. The methodology developed for
this project is based on existing NOM fractionation techniques (using DAX-8 and XAD-4
resins) allowing to observe behavior that cannot be observed easily when the integral
sample is manipulated. Finally, OM reactivity is investigated using experimental
chlorination tests on fractionated and non-fractionated samples under controlled
conditions of pH, temperature and chlorine dose. Includes 11 references, table, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 990 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 13 |
| Published : | 06/17/2004 |
