Full Description

As arsenic treatment systems for groundwater are being designed and installed, it is becomingapparent that many co-occurring anions can be present along with arsenic. Geologicalformations containing arsenic are often enriched with other trace metals, including uranium,antimony, tungsten, vanadium, and silica. With the exception of silica, U, Sb, W, and V have allbeen implicated with various adverse human health effects. New regulations mean that manysmall utilities still do not know how much uranium is present in their waters. While silica doesnot pose a health effect, its presence detrimentally impacts arsenic removal by iron adsorbents.Elevated phosphate is less likely to occur in conjunction with elevated arsenic, but datafrom several sites indicate significant P concentrations. There is also the potential for chemicalcontaminants (e.g., perchlorate) to occur with arsenic - and systems designed to remove ClOsub4/subsup-/supgenerally do not remove arsenic. Therefore data from multiple groundwaters across the US werestudied for simultaneous removal of arsenic and co-occurring anions. Includes tables, figures.

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Edition: Vol. - No. Published: 11/01/2006 Number of Pages: 27File Size: 1 file , 490 KB