Uranium extraction from sea water with composite adsorbents. II. Uranium adsorption on composite hydrous titanium(IV)-iron(II) oxide.:Uranium Adsorption on Composite Hydrous Titanium (IV) -Iron (II) Oxide

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A composite hydrous oxide, prepared from the mixed solution of titanium tetra-chloride and ferrous chloride by addition of sodium hydroxide solultion, was investigated because of its rather high uranium adsorption capacity and its magnetic property. Re-sults obtained may lead to easier handling of adsorbent species in the extraction of ura-nium from sea water.<BR>The uranium adsorption capacity of the composite hydrous oxide was measured using sea water to which a small amount of uranyl chloride was added. The initial uranium concentration was 10. 1 μg/<I>l</I>. Physical and chemical properties, such as specific surface area, mean pore radius and amount of surface OH groups, were also measured. The composite hydrous oxide was found to be composed mainly of relatively small particles of anatase and large particles of magnetite. Uranium adsorption capacity reaches its maximum when the precipitation temperatures are 5070°C. The capacity of the com-posite hydrous oxide was found to be closely related to the mean pore size and the amount of surface OH groups.
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