Arsenic's evil reputation is manifested in its old alchemists' symbol: a coiled serpent ready to strike. Considering Arsenic's eminence as the preferred homicidal agent of detective novels, it is not surprising there is a great deal of anxiety over its possible presence in water, among other substances, we use on a daily basis. This paper hopes to provide some facts on Arsenic; its occurrence, normal routes of exposure, its health effects, and finally, the various unit operations available for its removal from water...

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