Arsenic's evil reputation is manifested in its old alchemists' symbol - a coiled serpent ready to strike. 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 article addresses the various unit operations available for its removal from water.
The Environmental Protection Agency (EPA) has identified a number of treatment options for the removal of arsenic as the best available technology. Listed and discussed below, in no particular order of applicability, preference, efficiency or treatment cost, are some of the processes under consideration.