A New Type of Amidoxime-Group-Containing Adsorbent for the Recovery of Uranium from Seawater. III. Recycle Use of Adsorbent

Adsorption Efficiency of a New Adsorbent Towards Uranium and Vanadium Ions at Low Concentrations

“…Kise f et al [19] Dicyanoethylated polystyrene 0.004 mg/g U 0.08 mg/g Omichi g et al [27] Acrylonitrile grafted onto tetrafluoroethylene-ethylene copolymer 0.2 mg/g U 0.08 mg/g Kabay h et al [7] Polypropylene fiber grafted with acrylonitrile 0.152 mg/g U 0.608 mg/g Takeda i et al [28] Acrylonitrile grafted onto porous polyethylene hollow fiber 0.97 mg/g U 0.97 mg/g Saito j et al [29] Acrylonitrile grafted onto porous polyethylene hollow fiber 0.85 mg/g U 0.34 mg/g Omichi k et al [30] Fibrous adsorbent containing acrylic acid and acrylonitrile amidoximated polyacrylonitrile polymers and copolymers. The volumes of uranyl ion containing solutions in these batch, semi-batch, and continuous systems ranged from 40 mL to 50 L, the most frequently used volume is 20 L to which all other volumes are normalized.…”

Adsorptive features of chitosan entrapped in polyacrylamide hydrogel for Pb2+, UO22+, and Th4+

“…Gamma spectrometric method was employed for the determination of Pb 2+ and UO 2 2+ . Hydrochloric acid at 0.5-1 mol L −1 is known as an effective regenerator for resins [21,22]. This effluent was also tested for Ch and PAA-Ch with a reusability study for Pb 2+ .…”

Sorption of Metals by an Amidoxime Chelating Resin. Part I: Equilibrium

“…4) is an indicator of the degradation of amidoxime groups due to the instability of the resin in acidic media. This problem was reported by some authors (8,9,16,29).…”

“…One of the best examples of the applicability of chelating resins for the concentration of tracer elements is the recovery of uranium from seawater (7)(8)(9)(10)(11)(12)(13). The concentration of uranium in seawater is about 3 mg/m 3 (14), and it exists mainly as the tricarbonatouranate (VI) ion, [UO 2 (CO 3 )3~] (15).…”