Optimizing radionuclide sequestration in anion nanotraps with record pertechnetate sorption
Optimizing radionuclide sequestration in anion nanotraps with record pertechnetate sorption
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DOI：
10.1038/s41467-019-09630-y
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发表时间：
2019-04-09
影响因子：
16.6
通讯作者：
Ma, Shengqian
中科院分区：
文献类型：
--
作者：
Sun, Qi;Zhu, Lin;Ma, Shengqian
消除竞争对手的特定污染物是一项重大挑战。而不是依赖于一个单一的直接相互作用，多个功能的合作是一个新兴的战略吸附剂设计，以实现所需的亲和力。在这里，我们描述了与目标物种的相互作用可以通过修改直接接触位点的局部环境来改变，如通过操纵基于吡啶的阴离子纳米陷阱对高锝酸盐的亲和力所证明的。取代基效应的系统控制使得所得到的阴离子纳米陷阱能够联合收割机结合多种特征，克服了在超强酸碱性、强辐照场和高离子强度的极端条件下TcO 4-偏析的长期挑战。在迄今为止报道的材料中，顶级材料在与使用过的核燃料（汉福德罐废物，95%）和遗留核废物（萨凡纳河遗址，80%）相关的条件下进行单次处理后，表现出最高的吸附能力以及创纪录的高提取效率。
The elimination of specific contaminants from competitors poses a significant challenge. Rather than relying on a single direct interaction, the cooperation of multiple functionalities is an emerging strategy for adsorbents design to achieve the required affinity. Here, we describe that the interaction with the target species can be altered by modifying the local environment of the direct contact site, as demonstrated by manipulating the affinity of pyridinium-based anion nanotraps toward pertechnetate. Systematic control of the substituent effect allows the resulting anion nanotraps to combine multiple features, overcoming the long-term challenge of TcO4- segregation under extreme conditions of super acidity and basicity, strong irradiation field, and high ionic strength. The top material exhibits the highest sorption capacity together with record-high extraction efficiencies after a single treatment from conditions relevant to the used nuclear fuel (Hanford tank wastes, 95%) and legacy nuclear wastes (Savannah River Sites, 80%) among materials reported thus far.