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Using a Solid Oxidizing Media to Enhance Arsenic (As[III]) Removal at a Very Small System
Citation:
SORG, T. J. AND A. S. Chen. Using a Solid Oxidizing Media to Enhance Arsenic (As[III]) Removal at a Very Small System. IN: Ohio Section Newsletter , American Water Works Association, Columbus, OHSpring 2012:38-43, (2012).
Impact/Purpose:
To inform the public.
Description:
An adsorptive media system at the LEADS Head Start School (LHSS) Building in Buckeye Lake, OH, one of the 50 U.S. EPA Arsenic Removal Technology Demonstration sites, was relocated, after modifications, to Plainview Christian School in Plain City, OH to help bring the non-transient, no-community water system (NTNCWS) into compliance with the revised arsenic maximum contaminant level (MCL). The treatment system was relocated because treatment of well water at the LHSS was no longer needed due to the hookup of their water supply to city water. Before installation, two major modifications were made to the LHSS treatment system that consisted of (1) the addition of two parallel, pre-oxidation Filox™ media tanks placed immediately before the adsorptive media system (two tanks in series) and (2), the replacement of the ARM 200 adsorptive media with E33 media. System performance was evaluated from October 13, 2010, through June 8, 2011, and included the collection of operational data such as system pressure, flowrate, and throughput, as well as analytical data from water samples across the treatment train. The modified system was found to reduce the arsenic level from around 15 µg/L to less 3 µg/L during the first year of operation. As expected, the Filox™ oxidation media was very effective in oxidizing As(III) to As(V).
