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    Functionalized metal organic frameworks for effective capture of radioactive organic iodides

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    Type
    Article
    Authors
    Li, Baiyan
    Dong, Xinglong cc
    Wang, Hao
    Ma, Dingxuan
    Tan, Kui
    Shi, Zhan
    Chabal, Yves J.
    Han, Yu cc
    Li, Jing cc
    KAUST Department
    Advanced Membranes and Porous Materials Research Center
    Chemical Science Program
    Nanostructured Functional Materials (NFM) laboratory
    Physical Science and Engineering (PSE) Division
    Date
    2017
    Permanent link to this record
    http://hdl.handle.net/10754/625642
    
    Metadata
    Show full item record
    Abstract
    Highly efficient capture of radioactive organic iodides (ROIs) from off-gas mixtures remains a substantial challenge for nuclear waste treatment. Current materials utilized for ROI sequestration suffer from low capacity, high cost (e.g. use of noble metals), and poor recyclability. Recently, we have developed a new strategy to tackle this challenge by functionalizing MOF materials with tertiary amines to create molecular traps for the effective capture and removal of ROIs (e.g. radioactive methyl iodide) from nuclear wastes. To further enhance the uptake capacity and performance of CH3I capture by ROI molecular traps, herein, we carry out a systematic study to investigate the effect of different amine molecules on ROI capture. The results demonstrate a record-high CH3I saturation uptake capacity of 80% for MIL-101-Cr-DMEDA at 150 °C, which is 5.3 times that of Ag0@MOR (15 wt%), a leading adsorbent material for capturing ROIs during nuclear fuel reprocessing. Furthermore, the CH3I decontamination factors (DFs) for MIL-101-Cr-DMEDA are as high as 5000 under simulated reprocessing conditions, largely exceeding that of facility regulatory requirements (DF = 3000). In addition, MIL-101-Cr-DMEDA can be recycled without loss of capacity, illustrating yet another advantage compared to known industrial adsorbents, which are typically of a
    Citation
    Li B, Dong X, Wang H, Ma D, Tan K, et al. (2017) Functionalized metal organic frameworks for effective capture of radioactive organic iodides. Faraday Discuss 201: 47–61. Available: http://dx.doi.org/10.1039/c7fd00013h.
    Sponsors
    Financial support from the Materials Chemistry Program, Office of Science – Basic Energy Sciences of the U.S. Department of Energy through Grant No. DE-FG02-08ER-46491 is gratefully acknowledged. We would also like to acknowledge Micromeritics Instrument Corp. for the donation of a new 3Flex system through its Instrument Grant program.
    Publisher
    Royal Society of Chemistry (RSC)
    Journal
    Faraday Discuss.
    DOI
    10.1039/c7fd00013h
    PubMed ID
    28654114
    Additional Links
    http://pubs.rsc.org/en/Content/ArticleLanding/2017/FD/C7FD00013H#!divAbstract
    ae974a485f413a2113503eed53cd6c53
    10.1039/c7fd00013h
    Scopus Count
    Collections
    Articles; Advanced Membranes and Porous Materials Research Center; Physical Science and Engineering (PSE) Division; Chemical Science Program

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