Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA.
J Am Chem Soc. 2012 Oct 3;134(39):16441-6. doi: 10.1021/ja308028n. Epub 2012 Sep 25.
Uranium is the main source for nuclear energy but also one of the most toxic heavy metals. The current methods for uranium removal from water present limitations, such as narrow pH operating range, limited tolerance to high salt concentrations, or/and high cost. We show here that a layered sulfide ion exchanger K(2)MnSn(2)S(6) (KMS-1) overcomes these limitations and is exceptionally capable in selectively and rapidly sequestering high (ppm) as well as trace (ppb) quantities of UO(2)(2+) under a variety of conditions, including seawater. KMS-1 can efficiently absorb the naturally occurring U traces in seawater samples. The results presented here reveal the exceptional potential of sulfide-based ion-exchangers for remediating of uranium-containing wastes and groundwater and for extracting uranium from the sea.
铀是核能的主要来源，但也是毒性最大的重金属之一。目前从水中去除铀的方法存在一些局限性，例如 pH 操作范围狭窄、对高盐浓度的耐受能力有限、/或成本高。我们在这里表明，层状硫化物离子交换剂 K(2)MnSn(2)S(6)（KMS-1）克服了这些限制，并且在各种条件下，包括海水中，特别能够选择性和快速地螯合高（ppm）甚至痕量（ppb）量的 UO(2)(2+)。KMS-1 可以有效地吸收海水中天然存在的 U 痕量。这里呈现的结果揭示了基于硫化物的离子交换剂在修复含铀废物和地下水以及从海水中提取铀方面的巨大潜力。
