Abstract
To clarify the technical problems existing in the extraction process of uranium from sea water, uranium was extracted from natural sea water, with the granulated C-Ti-OH composite adsorbent.
The adsorption of uranium from sea water was carried out by using the fixed bed that had been designed in our laboratory. The uranium recovery from the sea water was 13.9% in the adsorption process of 56 d. The adsorbed uranium was eluted from the adsorbent with 0.5 N NaHCO3-0.5 N Na2CO3 soln. at 70°C. The elution recovery was 97.4% for 35 h.
The uranium contained in the eluate was concentrated twenty times as much as in the anion exchage process, and then 100 times in the solvent extraction process with oxine-chloroform and TOA-kerosene.
About 0.7 g of yellow cake was prepared from natural sea water, and it was identified to be pure 2UO2·NH3·3H2O by X-ray diffraction method and X-ray fluorometry.
