Details

Autor(en) / Beteiligte

• Goto, Akira
• Morooka, Shigeharu
• Fukamachi, Masakazu
• Kusakabe, Katsuki
• Kago, Tokihiro

Titel

Desorption of Uranium from Amidoxime Fiber Adsorbent

Ist Teil von

• Separation science and technology, 1993-10, Vol.28 (13-14), p.2229-2235

Ort / Verlag

United States: Taylor & Francis Group

Erscheinungsjahr

1993

Quelle

Taylor & Francis

Beschreibungen/Notizen

• An amidoxime fibrous adsorbent is contacted with uranium-enriched seawater (10 ppm); about 10 mg uranium is loaded per 1 g dry fiber. Then the rate and yield of uranium desorption from the fiber are determined with various eluents. Acid solutions are superior to alkali carbonate solutions as eluents. With a 0.1 mol·L −1 HCl solution, desorption is completed in 2 hours regardless of the presence of uranium in the leaching solution up to 15 ppm (≈ 6 × 10 −5 mol·L −1 ). Serial operation of the adsorption-desorption cycle four times does not affect desorption efficiency, but the addition of heavy metal ions to the eluent at a level of 1.8 × 10 −3 mol·L −1 significantly decreases desorption efficiency.