Journal
NUCLEAR TECHNOLOGY
Volume 144, Issue 2, Pages 274-278Publisher
AMER NUCLEAR SOCIETY
DOI: 10.13182/NT03-2
Keywords
radiation-induced graft polymerization; uranium specific fabric submerged system; seawater
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The total amount of uranium dissolved in seawater at a uniform concentration of 3 mg U/m(3) in the world's oceans is 4.5 billion tons. An adsorption method using polymeric adsorbents capable of specifically recovering uranium from seawater is reported to be economically feasible. A uranium-specific nonwoven fabric was used as the adsorbent packed in an adsorption cage 16 m 2 in cross-sectional area and 16 cm in height. We submerged three adsorption cages in the Pacific Ocean at a depth of 20 m at 7 kin offshore of Japan. The three adsorption cages consisted of stacks of 52 000 sheets of the uranium-specific non-woven fabric with a total mass of 350 kg. The total amount of uranium recovered by the nonwoven fabric was >1 kg in terms of yellow cake during a total submersion time of 240 days in the ocean.
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