Sulfate Separation from Aqueous Alkaline Solutions by Selective Crystallization of Alkali Metal Coordination Capsules
Arbin Rajbanshi
Bruce A. Moyer
Radu Custelcean
10.1021/cg200515w.s001
https://acs.figshare.com/articles/dataset/Sulfate_Separation_from_Aqueous_Alkaline_Solutions_by_Selective_Crystallization_of_Alkali_Metal_Coordination_Capsules/2632959
Self-assembly of a tris(urea) anion receptor with Na<sub>2</sub>SO<sub>4</sub> or K<sub>2</sub>SO<sub>4</sub> yields crystalline capsules held together by coordinating Na<sup>+</sup> or K<sup>+</sup> cations and hydrogen-bonding water bridges, with the sulfate anions encapsulated inside urea-lined cavities. The sodium-based capsules can be selectively crystallized in excellent yield from highly competitive aqueous alkaline solutions (∼6 M Na<sup>+</sup>, pH 14), thereby providing for the first time a viable approach to sulfate separation from nuclear wastes.
2011-07-06 00:00:00
sulfate anions encapsulated
sulfate separation
Sulfate Separation
Selective Crystallization
Na 2SO
capsule
K 2SO yields
Aqueous Alkaline Solutions