| Main Title |
Effect of Preloading on the Scale-Up of GAC (Granular Activated Carbon) Microcolumns. |
| Author |
Speth, T. F. ;
Miltner, R. J. ;
|
| CORP Author |
Environmental Protection Agency, Cincinnati, OH. Water Engineering Research Lab. |
| Publisher |
cApr 89 |
| Year Published |
1989 |
| Report Number |
EPA/600/J-89/021; |
| Stock Number |
PB89-236426 |
| Additional Subjects |
Water treatment ;
Column packings ;
Mathematical models ;
Surface chemistry ;
Diffusion ;
Activated carbon ;
Organic loadings
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB89-236426 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
10p |
| Abstract |
A previously proposed microcolumn scale-up procedure is evaluated. Scale-up assumptions dealing with equal capacities in microcolumns and field columns are focused on in an effort to evaluate the effect of preloading carbon with naturally-occurring organic materials (NOM). Reductions in capacity found in the column studies are compared to distilled, groundwater, and pre-adsorbed isotherms. Total organic carbon breakthrough in the field column is presented to explain capacity reductions. A simplified version of a mass transfer model and a more complex mass transfer model are used to predict the pilot column results. For the ground water studied, preloading NOM onto GAC reduced the carbon's capacity for cis- 1,2-dichloroethene. This preloading violated an assumption of a previously presented microcolumn scale-up procedure. Preloading of natural waters was therefore found to render incomplete carbon adsorption models that do not account for the possible reduction in capacity. Of the models that do not take preloading into account, the simple Constant Pattern Homogeneous Surface Diffusion Model gives a comparable prediction to the Dispersed Flow Pore Surface Diffusion Model, which incorporates more kinetic terms. |
| NTIS Title Notes |
Journal article. |
| Category Codes |
68D; 99F; 99A |
| NTIS Prices |
PC A02/MF A01 |
| Primary Description |
600/14 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
931317718 |
| Origin |
NTIS |
| Type |
CAT |
