The effect of potential competing anions (phosphate, sulfate, nitrate, fluoride, bicarbonate,
silicate, chloride and natural organic matter) on arsenic removal was evaluated on activated
alumina, Granular Ferric Hydroxide, and goethite. The presence of anions decreased arsenic
adsorption on all three adsorbents tested; the volume of water treated per unit mass of adsorbent
to exhaustion of the material decreased by 13 to 41%. Silicate, sulfate, and high concentrations
of fluoride were the most influential at pH 6, each anion explaining 15 to 35% of the variation in
arsenic adsorption. The influence of varying ionic strength and anion concentration differences
was also assessed and was found to affect anion adsorption and thus competition with arsenic.
Includes 27 references, table, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 430 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 18 |
| Published : | 06/17/2004 |
