Ion-based adsorbents, Granular ferric hydroxide (GFH) and Sorb 33 (E33), are
commercially available porous adsorbents. These adsorbents are currently being used or
expected to be used in a large number of full-scale arsenic treatment systems throughout
the US. This study investigated the impact of silica fouling in arsenic removal using iron-based
GFH and E33. Batch experiments and column experiments have been conducted to
understand the role of silica in arsenic adsorption. It has been observed that adsorption of
silica reduces the operational lifetime of GFH and E33 significantly through changing the
surface charge. However, several operational strategies such as series column
operation with delayed connection of the second column, and regeneration with
caustic solution at pH-12 can be used to increase the operational lifetime of the adsorptive
packed bed system. Includes 9 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 1.2 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 42 |
| Published : | 06/01/2007 |
