Crown ether-type organic composite adsorbents embedded in high-porous silica beads for simultaneous recovery of lithium and uranium in seawater
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The syntheses of crown ether-type organic composite adsorbents embedded in high-porous silica beads for simultaneous recovery of lithium and uranium in seawater have been achieved and the adsorption behavior of lithium and uranium on the composite adsorbents has been examined in several types of original seawater in the wide temperature and pH ranges. As a result, the composite adsorbents composed of benzo-15-crown-5 (BC15) and benzo-18-crown-6 (BC18) showed the top-class maximum adsorption capacities for lithium [6.5 mg/g (BC15), 11 mg/g (BC18)] and uranium [12 mg/g (BC15), 4.2 mg/g (BC18)].
KeywordsCrown ether-type organic composite adsorbent High-porous silica beads Lithium Uranium Seawater Simultaneous recovery
This work was partially supported by JSPS KAKENHI Grant Number 16K18346 and the NIFS Collaboration Research Program (Grant Number: NIFS18KESA029). The authors would like to thank Mr. Toshitaka Kaneshiki and Dr. Masao Nomura (Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology) and Dr. Tastuya Suzuki (Nagaoka University of Technology) for fruitful discussion and technical support.
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