1984 Volume 37 Issue 5 Pages 290-294
The desorption of uranium from the granular titanium-activated carbon composite adsorbent (concentration of uranium: 25.5mg/l-Ad), which adsorbed uranium from natural sea water, was examined by the column process with acidic eluent at room temperature. The column operation was able to be carried out without destruction of the granular adsorbent by the generation of the carbon dioxide, and free from disturbance of the eluent flow by precipitate of calcium sulfate dihydrate with sulfuric acid eluent. The amount of acid consumption by the adsorbent was 0.87eq/l-Ad. The alkaline earth metals were eluted in the range of elution volume below 2l/l-Ad, whereas uranium, iron, and titanium were eluted above 2l/l-Ad. Therefore, uranium was separable from the alkaline earth metals which were adsorbed in the most quantity in the adsorbent. In the range of elution volume 2 to 12l/l-Ad, the percentage of desorbed uranium and the concentration ratio of uranium were 80%, 680 with 0.5 N sulfuric acid, and 59%, 490 with 0.5 N hydrochloric acid respectively. The percentage of dissolved titanium (DTI) was 0.3% with 0.5 N sulfuric acid, 0.26% with 0.5 N hydrochloric acid in the same range.
