Arsenic Removal Filter.
https://www.emergency-wash.org/water/en/technologies/technology/arsenic-removal-filter
👉🏼 PDF: https://app.box.com/s/pgv9weqik9fuj1oumk2uz8e56zj5ierl ___ Arsenic is a groundwater contaminant naturally present in rocks and soils, though may also result from industrial activities. When present at levels over 10 μg/L, arsenic can detrimentally impact human health and should be addressed as soon as possible. It can be removed from groundwater by oxidation followed by filtration, precipitation, adsorption, ion exchange processes or reverse osmosis.