Layered metal sulfides: Exceptionally selective agents for radioactive strontium removal

Manolis J. Manos; Nan Ding; Mercouri G. Kanatzidis

doi:10.1073/pnas.0711528105

Layered metal sulfides: Exceptionally selective agents for radioactive strontium removal

Manolis J. Manos, Nan Ding, Mercouri G. Kanatzidis

Northwestern University

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

166 Citations (Scopus)

Abstract

In this article, we report the family of robust layered sulfides K _2xMn_xSn_3-xS₆ (x = 0.5- 0.95) (KMS-1). These materials feature hexagonal [Mn_xSn_3-xS ₆]^2x- slabs of the CdI₂ type and contain highly mobile K⁺ ions in their interlayer space that are easily exchangeable with other cations and particularly strontium. KMS-1 display outstanding preference for strontium ions in highly alkaline solutions containing extremely large excess of sodium cations as well as in acidic environment where most alternative adsorbents with oxygen ligands are nearly inactive. The implication of these results is that simple layered sulfides should be considered for the efficient remediation of certain nuclear wastes.

Original language	English
Pages (from-to)	3696-3699
Number of pages	4
Journal	Proceedings of the National Academy of Sciences of the United States of America
Volume	105
Issue number	10
DOIs	https://doi.org/10.1073/pnas.0711528105
Publication status	Published - Mar 25 2008

Keywords

Chalcogenide
Environmental remediation
Ion exchange
Layered materials
Nuclear waste

ASJC Scopus subject areas

General

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10.1073/pnas.0711528105

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abstract = "In this article, we report the family of robust layered sulfides K 2xMnxSn3-xS6 (x = 0.5- 0.95) (KMS-1). These materials feature hexagonal [MnxSn3-xS 6]2x- slabs of the CdI2 type and contain highly mobile K+ ions in their interlayer space that are easily exchangeable with other cations and particularly strontium. KMS-1 display outstanding preference for strontium ions in highly alkaline solutions containing extremely large excess of sodium cations as well as in acidic environment where most alternative adsorbents with oxygen ligands are nearly inactive. The implication of these results is that simple layered sulfides should be considered for the efficient remediation of certain nuclear wastes.",

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AU - Manos, Manolis J.

AU - Ding, Nan

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N2 - In this article, we report the family of robust layered sulfides K 2xMnxSn3-xS6 (x = 0.5- 0.95) (KMS-1). These materials feature hexagonal [MnxSn3-xS 6]2x- slabs of the CdI2 type and contain highly mobile K+ ions in their interlayer space that are easily exchangeable with other cations and particularly strontium. KMS-1 display outstanding preference for strontium ions in highly alkaline solutions containing extremely large excess of sodium cations as well as in acidic environment where most alternative adsorbents with oxygen ligands are nearly inactive. The implication of these results is that simple layered sulfides should be considered for the efficient remediation of certain nuclear wastes.

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