• AWWA ACE69059
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AWWA ACE69059

  • Cost-Effectiveness of Arsenic Adsorbents
  • Conference Proceeding by American Water Works Association, 11/01/2008
  • Publisher: AWWA

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A great deal of effort has been devoted to the development of new arsenic removaltechnologies. This study assesses the cost-effectiveness of different technologies basedon literature reports from different studies. Assessing performance based on literaturereports is challenging because different studies use different levels of backgroundions, different studies use different arsenic concentrations, and low-cost, lowadsorption density materials must be compared with high-cost, high adsorption densitymaterials. In this evaluation, technologies were compared using the cost of removing onegram of arsenic at an equilibrium arsenic concentration of 20 µg/L. Comparisons ofdifferent arsenic adsorbents indicate that the removal costs of the proprietary media(estimated at $2.3-$5.1/g arsenic removed) overlapped those of iron oxide-coated-sand(estimated at $3.3-4.2/g), which supports the current trend toward the use of metalhydroxide media. However, the close comparability of alternative approaches such asiron oxide-coated materials, zero-valent iron, etc., with them also suggests that continuedresearch in a variety of directions is justified. Includes 24 references, tables, figure.

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