Oxyanions of various contaminant elements, such as chromium, antimony,
molybdenum, tungsten, vanadium and uranium, are removed from water and
other aqueous feeds by treating the feed with (1) a sorbent comprising
one or more rare earth compounds, usually mixed or supported on
particulate solids having a cation exchange capacity less than 20
milliequivalents per 100 grams or (2) an aqueous solution of one or more
soluble rare earth compounds.