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Introduction of benzotriazole into graphene oxide for highly selective coadsorption of An and Ln: Facile synthesis and theoretical study
Ding J.2; Tang S.2; Chen X.3; Ding M.2; Kang J.2; Wu R.2; Fu Z.2; Jin Y.2; Li L.3; Feng X.1; Wang R.4; Xia C.2
2018-07-15
Source PublicationChemical Engineering Journal
ISSN13858947
Volume344Pages:594-603
Abstract

The removal of actinide (An) and lanthanide (Ln) elements from aqueous solution is a significant strategy for the safe disposal of radioactive wastes. Herein we presented a 5-methylbenzotriazole modified graphene oxide (MBTA-GO) as a novel adsorbent, in which benzotriazole group was used as targeted sorption site bearing strong affinity toward An-Ln (An and Ln) ions for the first time. MBTA-GO was characterized by Fourier transformed infrared spectroscopy (FT-IR), thermal gravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS). The effect of pH and initial concentration on combined adsorption of An-Ln were examined, and the results showed that the adsorption of metal ions on MBTA-GO was strongly dependent on pH in multi-cation solution, and MBTA-GO exhibited excellent An-Ln selectivity (selectivity coefficients are more than 99%), overwhelming majority of other reported adsorbents. The cycle experiments revealed that the MBTA-GO exhibited good reusability and structural stability. By density functional theory (DFT) calculation, the binding energy of Cation-MBTA-GO followed the order of Th(IV) > U(VI) > Eu(III) > La(III) > Sr(II) > Cs(I), suggesting that the benzotriazole groups were preferentially responsible for An-Ln ions on MBTA-GO, which is in well agreement with the experimental results. Finally, the mechanism of selective coadsorption was revealed, which is the synergistic effect of chemical complexation and electrostatic interaction.

Keyword5-methylbenzotriazole Actinides Density Functional Theory Graphene Oxide Lanthanides Selectivity
DOI10.1016/j.cej.2018.03.114
URLView the original
Indexed BySCI
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
WOS IDWOS:000430695300060
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Cited Times [WOS]:6   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionInstitute of Chinese Medical Sciences
Affiliation1.Logistical Engineering University China
2.Sichuan University
3.Sichuan Normal University
4.University of Macau
Recommended Citation
GB/T 7714
Ding J.,Tang S.,Chen X.,et al. Introduction of benzotriazole into graphene oxide for highly selective coadsorption of An and Ln: Facile synthesis and theoretical study[J]. Chemical Engineering Journal,2018,344:594-603.
APA Ding J..,Tang S..,Chen X..,Ding M..,Kang J..,...&Xia C..(2018).Introduction of benzotriazole into graphene oxide for highly selective coadsorption of An and Ln: Facile synthesis and theoretical study.Chemical Engineering Journal,344,594-603.
MLA Ding J.,et al."Introduction of benzotriazole into graphene oxide for highly selective coadsorption of An and Ln: Facile synthesis and theoretical study".Chemical Engineering Journal 344(2018):594-603.
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