Ultra-selective ion sieve for thorium extraction from rare earth elements with oxygen-rich microporous carbon
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Ultra-selective ion sieve for thorium extraction from rare earth elements with oxygen-rich microporous carbon
- 发表刊物：
- Journal of Hazardous Materials
- 摘要：
- The ultra-selective extraction of thorium ions (Th(IV)) from lanthanides is of significance to both solve the radioactive pollution issue in rare earth (RE) production and sustainably provide thorium fuel for the liquid fluoride thorium reactors (LFTR). However, it remains a great challenge. Here, we reported an oxygen-rich microporous carbon for ultra-selective extraction of Th(IV) from rare earth elements (REEs) in a wide pH range. This selectivity was derived from the synergy of the oxygen-rich nature, microporous structure of the carbons, the chemical valence, and the ionic size of Th(IV) species. This oxygen-rich microporous carbon pre- sented an ultra-high distribution coefficient (Kd) of 1.15 × 108 mL g−1 for Th(IV) at pH 4.9 in the presence of 15 REEs and revealed outstanding performance for Th(IV) extraction from three simulated RE solutions with high ionic strength of lanthanides. Meanwhile, an exceptional adsorption capacity of 624.98 mg g−1 was obtained in the single Th(IV) solution. Both values were superior to those of reported adsorbents. More importantly, the new adsorbent developed here could be prepared from cigarette butts. These features ensured the oxygen-rich carbon as a promising and cost-effective adsorbent for high-purity thorium extraction from REEs.
- 合写作者：
- Yangyang Gao, Lihong Xu, Meng Zhang, Qian Zhang, Zhencong Yang, Jialun Yang, Zhanglian Xu, Ying Lv, Yin Wang
- 卷号：
- 417
- 页面范围：
- 126115
- 是否译文：
- 否
- 发表时间：
- 2021-05-13