Highly selective cesium(I) capture under acidic conditions by a layered sulfide.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 35115493.
- Also identified by DOI 10.1038/s41467-022-28217-8 and PMC identifier 8813942.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Radiocesium remediation is desirable for ecological protection, human health and sustainable development of nuclear energy. Effective capture of Cs<sup>+</sup> from acidic solutions is still challenging, mainly due to the low stability of the adsorbing materials and the competitive adsorption of protons. Herein, the rapid and highly selective capture of Cs<sup>+</sup> from strongly acidic solutions is achieved by a robust K<sup>+</sup>-directed layered metal sulfide KInSnS<sub>4</sub> (InSnS-1) that exhibits excellent acid and radiation resistance. InSnS-1 possesses high adsorption capacity for Cs<sup>+</sup> and can serve as the stationary phase in ion exchange columns to effectively remove Cs<sup>+</sup> from neutral and acidic solutions. The adsorption of Cs<sup>+</sup> and H<sub>3</sub>O<sup>+</sup> is monitored by single-crystal structure analysis, and thus the underlying mechanism of selective Cs<sup>+</sup> capture from acidic solutions is elucidated at the molecular level.