Current technologies for removing heavy metal ions are typically metal ion specific. Herein we report the development of a broad-spectrum heavy metal ion trap by incorporation of ethylenediaminetetraacetic acid into a robust metal-organic framework. The capture experiments for a total of 22 heavy metal ions, covering hard, soft, and borderline Lewis metal ions, show that the trap is very effective, with removal efficiencies of >99% for single-component adsorption, multi-component adsorption, or in breakthrough processes. The material can also serve as a host for metal ion loading with arbitrary selections of metal ion amounts/types with a controllable uptake ratio to prepare well-dispersed single or multiple metal catalysts. This is supported by the excellent performance of the prepared Pd²⁺-loaded composite toward the Suzuki coupling reaction. This work proposes a versatile heavy metal ion trap that may find applications in the fields of separation and catalysis.

中文翻译：

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基于MOF的通用捕集阱，用于重金属离子的捕获和分散。

当前去除重金属离子的技术通常是特定于金属离​​子的。本文中，我们通过将乙二胺四乙酸掺入坚固的金属有机骨架中，报道了广谱重金属离子阱的发展。对总共22种重金属离子的捕获实验（涵盖硬，软和临界路易斯金属离子）表明，该捕集阱非常有效，对于单组分吸附，多组分吸附或在突破性的过程中。该材料还可以用作金属离子负载的基质，可以任意选择具有可控制的吸收比的金属离子数量/类型，以制备分散良好的单一或多种金属催化剂。制备的Pd ²⁺具有出色的性能，这^{证明了这一点。}负载的复合材料朝着铃木偶联反应的方向发展。这项工作提出了一种通用的重金属离子阱，可以在分离和催化领域找到应用。