| 简介 |
PROBLEM TO BE SOLVED : To provide a technique to economically and effectively remove many different types of toxic metals from vast volumes of drinking water, well water and industrial waters, and to be capable of removing a variety of radioactive materials from these aqueous streams either alone or in combination with toxic nonradioactive metals.
SOLUTION : A process for removing oxyanions of an element having an atomic number selected from the group consisting of 5, 13, 14, 22 to 25, 31, 32, 40 to 42, 44, 45, 49 to 52, 72 to 75, 77, 78, 82, 83 and 92 from an aqueous feed containing one or more of the oxyanions, which process comprises contacting the aqueous feed with a sorbent comprising one or more rare earth compounds to remove one or more of the oxyanions from the feed and thereby produce an aqueous fluid having a reduced concentration of the oxyanions as compared to the feed.
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