Mengping Chen,Lang Lang,Lei Chen,Xiaomei Wang,Cen Shi,Qiwen Sun,Yigong Xu,Juan Diwu,Shuao Wang
Comprehensive Summary The environmental contamination of uranium will occur in scenarios such as nuclear accidents and leakage from nuclear waste storage sites, which eventually leads to the internal uranium exposure of people, causing consequential injuries of renal failure, osteosarcoma, etc . The development of uranyl specific chelating agents that could sequester uranium in vivo is in urgent need and is important for the safe and efficient development of nuclear industry. Metal organic frameworks (MOFs) already serve as efficient uranium depletion materials in solutions of a wide range of pH and ionic strength for nuclear fuel recycling, uranium extraction from seawater, as well as environmental decontamination. Herein, a chromium-based nano-metal organic framework (nano-MOF) functionalized interiorly with 3,2-HOPO ligands, MIL-101-HOPO, is rationally synthesized. In vitro adsorption experiments show that MIL-101-HOPO exhibits high adsorption selectivity and fast adsorption kinetics for uranyl. The results of in vivo uranyl decorporation assays reveal that MIL-101-HOPO with the decoration of HOPO ligands on the interior wall exhibits significantly increased uranyl removal ratio in kidneys comparing to the pristine nMOFs, and is more effective than the clinically used ZnNa 3 -DTPA. All those results corroborate the interior functionalization of MOFs as an efficient strategy to develop promising uranyl decorporation agents.
The highly efficient removal of radioactive iodine from nuclear accident-polluted seawater is of great significance for the purpose of environmental protection. Herein, we report an indium-based metal–organic framework, named In-MOF, for highly efficient removing iodine from seawater. In-MOF is constructed by In 3+ ions coordinated with tris (4-(1H-imidazol-1-yl) phenyl) amine and exhibits high chemical stability even under seawater for 30 days. Due to the flexible one-dimensional linear structure and high-density charged imidazolium groups, In-MOF possesses a high adsorption capacity (1138 mg/g) for iodine in water. Furthermore, it exhibits high selectivity in the presence of competitive ions, due to forming the unique I-π interactions between iodine and the In-MOF. Notably, these excellent adsorption features endowed In-MOF successfully remove iodine from seawater with a high removal rate of 93.86%. These results are of fundamental importance to understanding iodine uptake and designing materials with high adsorption capacity.
危险品化学品经营许可证（带存储）