IEC 176 |
| Ibrahim S. Shaban1, Stephen E Creager2, Tanju Karanfil3, and James D. Navratil3. (1) Environmental Engineering and Science, Clemson Universtiy, 342 Computer Court, Anderson, SC 29625-6510, (2) Department of Chemistry, Clemson University, Clemson, SC 29634, (3) Department of Environmental Engineering and Science, Clemson University, 342 Computer Court, Clemson, SC 29634-0919 |
| Recent efforts by the USEPA have focused on reducing the concentration levels of arsenic in drinking water. In this regard, we are developing a new and inexpensive process for purifying water containing elevated levels of arsenic. This nanolevel high gradient magnetic filtration/adsorption process is based on the use of a supported surface complex such as natural magnetite (FeOFe2O3). In the absence of an external magnetic field, activated magnetite readily adsorbs numerous metal species including arsenic. In the presence of an external magnetic field, a synergistic effect was observed in using supported magnetite. These observations may be explained by a nanolevel high gradient magnetic separation effect, as colloidal particles with satisfactory magnetic properties can be present in natural water systems. This paper will review results to date on testing the process for arsenic removal using some alternative iron adsorbents, such as ferrihydrites impregnated into activated carbon and carbon aerogels with various compositions. |
|
General Poster Session
5:00 PM-7:00 PM, Tuesday, March 25, 2003 Convention Center -- Hall G, Poster
Sci-Mix
Division of Industrial and Engineering Chemistry |