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Iron and manganese removal filters typically use an oxidation process ahead of the filters in order to achieve desired treated water levels for compliance. The treatment process is optimized with the proper selection of filtration media based upon the specific properties of the water being treated.
Arsenic is a naturally occurring contaminant found in many groundwater sources. In 2001 the USEPA established a maximum contaminant level (MCL) of 0.010 mG/L (10 ppb). The common forms of arsenic are arsenite (As III) and arsenate (As V). Arsenite is more soluble in water and less available for precipitation or adsorption than arsenate; therefore, oxidation is often implemented to optimize arsenic removal.