A process for the adsorption of contaminants from water using silica aerogel/granular
activated carbon (GAC) composites has been developed by Lawrence Livermore
National Laboratory (LLNL). Like GAC, the aerogel has a very large surface area
(approximately 1000 m2/g), but it has the added advantage of being hydrophobic with a low density. Unlike GAC, the composite can remove both volatile
organic compounds (VOCs) and metals. Previous work at LLNL has investigated uranium removal by a phosphorous enriched
hydrophobic aerogel/GAC composite. Producing a P-enriched aerogel-GAC composite
improved uranium removal above the GAC without the composite. Varying the type and
amount of phosphorous (phosphonate, 1% or 17% H<sub>3</sub>PO<sub>4</sub>) affected uranium removal,
based upon analysis of isotherm data. Additionally, adsorbency was confirmed via column
tests and a field demonstration. This paper briefly discusses this uranium-related work to
demonstrate the potential for aerogel-GAC composite materials to remove oxo-anions. Includes table, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 570 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 5 |
| Published : | 06/17/2005 |
