We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
First Potassium Fluoroaluminate Ionic Exchanger for Rapid and Selective Removal of Sr<sup>2+</sup> with High Capacity.
- Authors
Hao, Yucheng; Chen, Yongjian; Cao, Xin; Chen, Changlin; Xu, Min; Lin, Yuan; Li, Haijian; Hu, Kunhong
- Abstract
90Sr, as a typical artificial radionuclide, poses a serious threat to human health and the ecological environment. The selective removal of this radionuclide from industrial nuclear waste is crucial for our environment. Here we report a novel potassium fluoroaluminate, K2[(AlF5)H2O], which was synthesized by a simple low‐temperature one‐step method. It adopts a 1D AlF6‐chain structure, which consists of exchangeable potassium ions in between the infinite chains of octahedral Al centers. As a remarkable inorganic ionic exchanger, K2[(AlF5)H2O] has a high chemical stability (resistance of pH=~3‐12) and thermal stability (≥~300 °C). It possesses an excellent adsorption selectivity (Kd=~6.1×104 mL ⋅ g−1) and a maximum adsorption capacity of qm=~120.32 mg ⋅ g−1 for Sr2+. Importantly, it still keep a very good selectivity for Sr2+ ions even in the presence of competing Na+, Mg2+ and Ca2+ aqueous solutions. K2[(AlF5)H2O] is the first example of fluoroaluminate ionic exchange materials that can capture Sr2+. This result opens up a new way to design and synthesize inorganic ionic exchangers for the selective removal of Sr2+ ions from radioactive waste water.
- Subjects
K2 (Pakistan : Mountain); CHEMICAL stability; INDUSTRIAL wastes; ENVIRONMENTAL health; POTASSIUM; POTASSIUM ions; SOIL acidity; RADIOACTIVE wastes
- Publication
Chemistry - A European Journal, 2024, Vol 30, Issue 27, p1
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.202400261