Zirconium-Based Metal-Organic Framework for Removal of Perrhenate from Water
Zirconium-Based Metal-Organic Framework for Removal of Perrhenate from Water
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DOI：
10.1021/acs.inorgchem.6b01004
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发表时间：
2016-09-05
影响因子：
4.6
通讯作者：
Thallapally, Praveen K.
中科院分区：
文献类型：
--
作者：
Banerjee, Debasis;Xu, Wenqian;Thallapally, Praveen K.
从废液或熔炉废气溶液中有效去除高锝酸盐（TcO 4-）阴离子进行替代处理是管理遗留核废物中Tc-99的有前途的选择之一。由于Tc-99的半衰期长（t（1/2）= 2.13 × 10（5）年）和环境迁移性，其安全固定非常重要。不同类型的无机和固态离子交换材料已被证明可以从水中吸收TcO 4-阴离子。然而，高容量和高选择性还没有在单一材料中实现。在这里，我们表明，质子化版本的超稳定的锆基金属有机框架可以吸附过氧化氢（ReO 4-）阴离子，非放射性替代TcO 4-，从水中，即使在其他常见的阴离子的存在下。基于同步辐射的粉末X射线衍射和分子模拟被用来确定的位置的吸附ReO 4-（替代TcO 4-）分子的框架内。
The efficient removal of pertechnetate (TcO4-) anions from liquid waste or melter off-gas solution for an alternative treatment is one of the promising options to manage Tc-99 in legacy nuclear waste. Safe immobilization of Tc-99 is of major importance because of its long half-life (t(1/2) = 2.13 X 10(5) yrs) and environmental mobility. Different types of inorganic and solid-state ion-exchange materials have been shown to absorb TcO4- anions from water. However, both high capacity and selectivity have yet to be achieved in a single material. Herein, we show that a protonated version of an ultrastable zirconium-based metal-organic framework can adsorb perrhenate (ReO4-) anions, a nonradioactive surrogate for TcO4-, from water even in the presence of other common anions. Synchrotron-based powder X-ray diffraction and molecular simulations were used to identify the position of the adsorbed ReO4- (surrogate for TcO4-) molecule within the framework.