折りたたまれたメソポラス炭素を用いた稀土元素からの選択的トリウム抽出
Zijie Wang1, Alexander T Brown1, Kui Tan2
1Department of Chemistry and Biochemistry , 800 West Campbell Road , University of Texas at Dallas , Richardson , Texas 75080 , United States.
Journal of the American Chemical Society
|October 24, 2018
まとめ
WMC-Oという新型の多孔性炭素材料は 稀土元素からトリウムを抽出します この再利用可能な固体吸収剤は,トリウム生産のための従来の液体-液体抽出よりも大きな利点を提供します.
科学分野:
- 核工学
- 材料科学
- 分析化学
背景:
- 液体フッ素トリウム炉は,ウラン炉よりも経済的,環境的な利点を提供しています.
- トリウムの生産には モナサイトのような鉱物にある 希土元素から分離する必要があります
- 従来の分離方法は液体-液体抽出を使用しており,再利用可能な固体代替物の開発が必要である.
研究 の 目的:
- 選択的なトリウムイオン抽出のための新しい固体吸収剤を開発する.
- トリウムと稀土イオンを分離するための表面酸化された状メソポラス炭素 (WMC-O) の性能を評価する.
- WMC-Oの再利用性と吸収能力を評価する.
主な方法:
- 表面酸化した折りたたみのあるメソポラス炭素 (WMC-O) の合成
- トリウムと希土イオンの配分係数 (Kd) を決定する吸着実験.
- 表面酸化活性炭によるWMC-Oの比較分析
主要な成果:
- WMC-Oは,稀土イオンよりもトリウムイオン (Th4+) に高い選択性を示した.
- WMC-Oを使用したトリウムの配分係数は,pH2.15で活性炭 (Kd = 35 × 10^2) と比較して,かなり高かった.
- WMC-Oは,純粋な希土イオン (Kd > 3 × 10 ^ 5) の高い吸収能力を示した.
結論:
- 表面酸化された状メソポラス炭素 (WMC-O) は,トリウム抽出のための非常に選択的で有望な吸収剤です.
- WMC-Oは,効率的な希土イオン回収の可能性を秘めています.
- 材料の性質は,先進的な核燃料サイクルアプリケーションでその使用をサポートします.
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