AWWA JAW66309

Water utilities need cost-effective technologies inorder to meet the US Environmental Protection Agency'snew maximum contaminant level for arsenic. It hasbeen demonstrated that iron oxide-coated sand is aneffective adsorbent material for the removal of arsenicand other metals and metalloids from drinking waterand wastewater. Fibrous materials offer higher specificsurface area than granular materials and thus wereevaluated for retaining iron-oxide. Four types offibrous materials - polypropylene, polyester, fiberglass,and cellulose - were evaluated for their ability to retainiron coatings and to remove arsenate. Sand was alsoevaluated to provide a basis for comparison with previousresearch.In isotherm experiments, all four fibrous materialsshowed higher arsenate adsorption densities than ironoxide-coated sand. Arsenate adsorption densities werehighest for iron oxide-coated fiberglass and cellulose,suggesting that these fibrous materials may offeradvantages over iron oxide-coated sand. Includes 71 references, tables, figures.

Product Details

Edition:

Vol. 100 - No. 4

Published:

04/01/2008

Number of Pages:

14

File Size:

1 file , 760 KB