The changes in the polarity of natural organic matter (NOM) across two water
treatment configurations, conventional treatment (coagulation, flocculation, sedimentation
and filtration) and conventional treatment with pre-ozonation and biofiltration were
analyzed at pilot-scale using the polarity rapid assessment method (PRAM). The pilot plant
had two parallel treatment trains, which allowed for the characterization of both processes
simultaneously and minimized the temporal variability of the influent water. The use of the polarity rapid assessment method
(PRAM) offered the advantage of evaluating variations in NOM character and reactivity
under ambient conditions after filtration. Results showed temporal variations between
polarity on the raw influent samples as well as differences in the specific chemistry of the
NOM through each treatment. Overall, ozone/biofiltration reduced non-polar and polar
NOM, whereas the effect of conventional treatment varied between samples. In some
cases, the changes in polarity caused by conventional treatment produced NOM of similar
polarity to the ozone/biofiltration train. Ozonation was shown to decrease the
hydrophobicity and increase the polarity of NOM. These results suggest the influent NOM
variability should be considered and monitored as these changes result in differences in
NOM removal and reactivity. Includes 36 references, table, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 1.2 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 16 |
| Published : | 06/01/2007 |
