A method for removing dissolved arsenic from an aqueous medium comprising
adding lime to the aqueous medium, and adding one or more sources of
divalent metal ions other than calcium and magnesium to the aqueous
medium, whereby dissolved arsenic in the aqueous medium is reduced to a
lower level than possible if only the step of adding lime were performed.
Also a composition of matter for removing dissolved arsenic from an
aqueous medium comprising lime and one or more sources of divalent copper
and/or zinc metal ions.
