Adsorption Properties of uranium on a Banded Fiber Adsorbent Containing Amidoxime groups in a Stream of Sea Water

摘要

The adsorption of uranium on a banded fiber adsorbent containing amidoxime groups (Banded-AOF) with a constant diameter (d=5 or 10 mm) and a constant length (l=5approx200 mm) was examined by arranging banded-AOF with a sinker attached to its deep end (#sigma#=W/S=0.001 or 0.01 kg/mm~2, where W is teh weight of the sinker an S is the section area of banded-AOF), in a stream of sea water with a velocity of 27 cm/s. The adsorption rate of Banded-AOF increased with an increase in the ratio l/d, and reached a maximum value in the range of l/d>10; furthermore, it increased as the load #sigma# decreased. this adsorptiove toward uranium is explained by the shape of Banded-AOF in the stream of sea water: the middle region of Banded-AOF expanded more with an increase in l/d and a decrease in #sigma#. the adsorption rate of Banded-AOF with l/d=20 and #sigma#=0.001 kg/mm~2 in the sea water stream of 27 cm/s was almost equal to that in a column experiment, exhibiting an uptake of uranium of 0.45 mg/g for 14 days. The above results were consistent with those of the adsorption of uranium on Banded-AOF in two in a natural sea area.