Water utilities need cost-effective technologies in
order to meet the US Environmental Protection Agency's
new maximum contaminant level for arsenic. It has
been demonstrated that iron oxide-coated sand is an
effective adsorbent material for the removal of arsenic
and other metals and metalloids from drinking water
and wastewater. Fibrous materials offer higher specific
surface area than granular materials and thus were
evaluated for retaining iron-oxide. Four types of
fibrous materials - polypropylene, polyester, fiberglass,
and cellulose - were evaluated for their ability to retain
iron coatings and to remove arsenate. Sand was also
evaluated to provide a basis for comparison with previous
research.
In isotherm experiments, all four fibrous materials
showed higher arsenate adsorption densities than iron
oxide-coated sand. Arsenate adsorption densities were
highest for iron oxide-coated fiberglass and cellulose,
suggesting that these fibrous materials may offer
advantages over iron oxide-coated sand. Includes 71 references, tables, figures.
| Edition : | Vol. 100 - No. 4 |
| File Size : | 1
file
, 760 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 14 |
| Published : | 04/01/2008 |
