No abstract

Braid adsorbent having functional group of amidoxime is a promising material for the recovery of uranium dissolved in the seawater. This braid adsorbent was made by polyethylene multi-fibers which were fictionalized by radiation-induced graft polymerization and subsequent chemical treatment. There was correlation between the grafting time and the degree of crystalline orientation of the fiber. The braid adsorbent obtained was moored at the offing of Okinawa Island. The adsorption of uranium increased three times when the stacks of cloth adsorbent was soaked in seawater at the offing of Aomori prefecture. It was found that the braid adsorbents could improve the efficiency of contact between the adsorbent and the seawater. Moreover, the mooring system has possibility which reduced the cost for the recovery of uranium from seawater.