Q&A: Arsenic Adsorptive Media

Find out more about the characteristics of Bayoxide E33 media from AdEdge

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Q&A: Arsenic Adsorptive Media

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This Q&A continues the discussion of arsenic treatment options with AdEdge Water Technologies.

What is Bayoxide E33?
BayoxideE33 is a crystalline form of iron oxyhydroxide (also known as granular ferric oxide) arsenic adsorptive media that provides a long operating life and low operating costs. The media is NSF 61 approved. The media is designed to remove both Arsenic (III) and Arsenic (V) from drinking water sources. The product has been utilized in over 12 U.S. EPA Arsenic Demonstration projects and hundreds of public water systems throughout the world. AdEdge’s product is ideal for integrated water system solutions, commercial installations, remediation and residential POE systems to meet the EPA arsenic standard of 10 ppb.

What other contaminants can E33 remove?
There are several heavy metals that exhibit similar chemical properties as arsenic. Generally, their effects are minimal as the concentrations present in the water are very low. If the concentrations are higher than the arsenic then there may be a reduction in performance. Some of the key heavy metals that should be considered are vanadium, selenium, antimony and nickel.

How does E33 compare to other adsorptive medias?
Over varied water chemistries, Bayoxide E33 can treat more bed volumes to below the arsenic standard of 10 ppb. AdEdge is not aware of any independent studies that have shown any treatment technologies outperforming E33. E33 granules are a crystalline form of iron oxide. This crystalline structure has more consistency in terms of adsorption capacity and shelf life.

What is speciation and how does speciation influence the treatment process selected?
Arsenic exhibits two valences commonly found in groundwater as oxyanion species, arsenite, As3- or As(III), and arsenate, As5+ or As(V). Arsenate is nonionic and is the most common form of arsenite. It has no ionic charge and is the most difficult to remove via separation processes. Neither ion exchange resins, reverse osmosis, nor most metal oxide adsorbents can remove it without oxidation to the arsenate valence. Bayoxide E33 removes arsenate, As(V), via chemisorption. It also removes arsenite, As(III), in addition to As(V), unlike other metal oxide adsorbents.

About AdEdge Water Technologies
Headquartered just north of Atlanta, Georgia, AdEdge Water Technologies specializes in the design, development, manufacturing and supply of innovative water treatment solutions that remove contaminants from process or aqueous streams. AdEdge offers a full range of conventional and innovative treatment technologies to achieve trough standards including adsorption, coagulation, ion exchange, biofiltration and membrane-based solutions. For more information, call 866/8ADEDGE or visit www.adedgetechnologies.com.


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