Sulfate separation from aqueous alkaline solutions by selective crystallization of alkali metal coordination capsules

Arbin Rajbanshi; Bruce A. Moyer; Radu Custelcean

doi:10.1021/cg200515w

Sulfate separation from aqueous alkaline solutions by selective crystallization of alkali metal coordination capsules

Arbin Rajbanshi, Bruce A. Moyer, Radu Custelcean

Chemical Separations Group

Research output: Contribution to journal › Article › peer-review

71 Scopus citations

Abstract

Self-assembly of a tris(urea) anion receptor with Na₂SO ₄ or K₂SO₄ yields crystalline capsules held together by coordinating Na⁺ or K⁺ 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⁺, pH 14), thereby providing for the first time a viable approach to sulfate separation from nuclear wastes.

Original language	English
Pages (from-to)	2702-2706
Number of pages	5
Journal	Crystal Growth and Design
Volume	11
Issue number	7
DOIs	https://doi.org/10.1021/cg200515w
State	Published - Jul 6 2011

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abstract = "Self-assembly of a tris(urea) anion receptor with Na2SO 4 or K2SO4 yields crystalline capsules held together by coordinating Na+ or K+ 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+, pH 14), thereby providing for the first time a viable approach to sulfate separation from nuclear wastes.",

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AU - Moyer, Bruce A.

AU - Custelcean, Radu

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N2 - Self-assembly of a tris(urea) anion receptor with Na2SO 4 or K2SO4 yields crystalline capsules held together by coordinating Na+ or K+ 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+, pH 14), thereby providing for the first time a viable approach to sulfate separation from nuclear wastes.

AB - Self-assembly of a tris(urea) anion receptor with Na2SO 4 or K2SO4 yields crystalline capsules held together by coordinating Na+ or K+ 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+, pH 14), thereby providing for the first time a viable approach to sulfate separation from nuclear wastes.

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Sulfate separation from aqueous alkaline solutions by selective crystallization of alkali metal coordination capsules

Abstract

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