Process using rare earths to remove oxyanions from aqueous streams
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United States of America Patent
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Mar 4, 2008
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N/A
app pub date -
Jul 27, 2005
filing date -
Jul 27, 2005
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Abstract
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.
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