Abstract
AbstractThe metal vanadium (V), often present as pentavalent oxyanion vanadate, can be present in groundwaters worldwide due to natural origin. While there are presently no US drinking water standards for vanadium, the German Environmental Protection Agency has defined a guidance value of 4 μg/L in drinking water. Impacted water suppliers need an effective and selective treatment process for meeting this value. In 2020, an extended efficiency test (EET) was completed successfully at a water works in Daun, Germany using GEH®, Granular Ferric Hydroxide, an adsorbent that has been in use for over 20 years in several thousand treatment plants worldwide, primarily for removal of arsenic present as arsenate, with chemical similarities to vanadate. An EET, performed in a treatment plant with a flow of 34 m3/h over 13 months, demonstrated reliable removal of vanadium, present at 28 μg/L, down to the limit of quantification (2 μg/L). Thus, for water supplies with vanadium occurrence and a similar water quality, GEH® may provide an effective treatment option.
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