This slide presentation outlines a study where
mathematical models were used to scale-down a full-scale adsorber
to a rapid small scale column test (RSSCT) and maintain perfect similarity between performance
of the adsorbers.
Advantages included:
breakthrough curves (BTCs) can be obtained in a fraction of the
time;
BTCs can be obtained with a fraction of the water; and,
isotherm or kinetic studies are not required to obtain a full-scale
performance prediction (unlike mathematical models: e.g., HSDM). Two RSSCT test approaches are outlined and include: constant diffusivity (CD), which assumes diffusivity is constant and independent of particle size; and, proportional diffusivity (PD), which assumes diffusivity is linear and dependent on particle size. RSSCT Summary includes:
RSSCT test results, to date, have demonstrated RSSCT
can be a potential tool in predicting granular ferric
hydroxide (GFH) bed life for arsenic (arsenate) removal;
PD approach, overall, provides best simulation at lower,
environmentally relevant, initial concentrations, and
CD approach may be applicable under higher initial
concentrations;
PD approach is applicable when internal mass transfer is
rate limiting; and,
also applicable to other inorganic micropollutants (e.g.,
phosphate) and other metal oxides (e.g., granular ferric
oxide (GFO)). Includes figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 590 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 36 |
| Published : | 06/01/2006 |
