A novel vanadosilicate with hexadeca-coordinated Cs(+) ions as a highly effective Cs(+) remover.

Autor: Datta SJ; Korea Center for Artificial Photosynthesis, Center for Nanomaterials, Department of Chemistry, Sogang University, Seoul 121-742 (Korea)., Moon WK, Choi DY, Hwang IC, Yoon KB
Jazyk: angličtina
Zdroj: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2014 Jul 07; Vol. 53 (28), pp. 7203-8. Date of Electronic Publication: 2014 May 22.
DOI: 10.1002/anie.201402778
Abstrakt: The effective removal of (137) Cs(+)  ions from contaminated groundwater and seawater and from radioactive nuclear waste solutions is crucial for public health and for the continuous operation of nuclear power plants. Various (137) Cs(+)  removers have been developed, but more effective (137) Cs(+)  removers are still needed. A novel microporous vanadosilicate with mixed-valence vanadium (V(4+) and V(5+) ) ions is now reported, which shows an excellent ability for Cs(+)  capture and immobilization from groundwater, seawater, and nuclear waste solutions. This material is superior to other known materials in terms of selectivity, capacity, and kinetics, and at very low Cs(+)  concentrations, it was found to be the most effective material for the removal of radioactive Cs(+)  ions under the test conditions. This novel vanadosilicate also contains hexadeca-coordinated Cs(+)  ions, which corresponds to the highest coordination number ever described.
(© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Databáze: MEDLINE
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