Ultrastable Zirconium-Based Cationic Metal–Organic Frameworks for Perrhenate Removal from Wastewater

The effective removal of radioactive 99TcO4 – anion from nuclear wastewater remains a very difficult unsolved problem. Functional adsorbent materials with high stability, anion-exchange capacity, excellent selectivity, and recyclability are much needed to solve this problem. In this work, we designe...

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Bibliographic Details
Published in:Inorganic chemistry 2021-08, Vol.60 (16), p.11730-11738
Main Authors: Zhang, Guoyu, Tan, Kui, Xian, Shikai, Xing, Kai, Sun, Hongbing, Hall, Gene, Li, Liangying, Li, Jing
Format: Article
Language:English
Subjects:
Anions
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Ligands
Metal organic frameworks
Solutions
Stability
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Summary:The effective removal of radioactive 99TcO4 – anion from nuclear wastewater remains a very difficult unsolved problem. Functional adsorbent materials with high stability, anion-exchange capacity, excellent selectivity, and recyclability are much needed to solve this problem. In this work, we designed two stable cationic metal–organic frameworks (MOFs)Zr-tcbp-Me and Zr-tcpp-Mefor possible use as adsorbent materials to remove 99TcO4 –. Both compounds were synthesized by solvothermal reactions of the tetracarboxylate ligand with zirconium salt, followed by postsynthetic modification (N-methylation). The crystallinity of both zirconium-based MOFs can be well retained under harsh conditions, and they exhibit high adsorption capacity and selectivity toward ReO4 – anion, a nonradioactive analogue of 99TcO4 –. Zr-tcbp-Me and Zr-tcpp-Me demonstrate the highest framework stability toward acidity among all previously reported cationic MOFs that have been tested for perrhenate removal from wastewater.
ISSN:0020-1669
1520-510X
DOI:10.1021/acs.inorgchem.1c00512