Natural organic matter (NOM) hinders adsorption of trace organic compounds by
powdered activated carbon (PAC) via two mechanisms: direct site competition by small,
strongly adsorbing molecules, and pore blockage by large molecules. Li et al. (2002)
developed a three-component model, COMPSORB, to describe atrazine adsorption in
continuous flow PAC/membrane systems by using two model compounds to represent
strongly competing and pore blocking fractions of NOM, respectively. The primary
objective of this research was to show that COMPSORB can be applied to natural water
systems. In this research the authors established a quantitative analytical method to
determine the necessary NOM characteristics so that the 3-component model can be used
to predict PAC performance in continuous-flow PAC/membrane systems. NOM was
differentiated into two fictive fractions based on adsorptive characteristics and
competition mechanisms in order to obtain equilibrium and kinetic parameters for these
fractions from batch test data. Model prediction using these data to predict atrazine
removal in a PAC/membrane system treating natural water were conducted, as well as
the real PAC/MF experiments using natural water. The results show promising results in
characterizing NOM for prediction of PAC performance in water treatment. Includes 8 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 290 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 10 |
| Published : | 06/15/2003 |
