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首页> 外文期刊>Environmental Science & Technology >Different Interaction Mechanisms of Eu(Ⅲ) and ~(243)Am(Ⅲ) with Carbon Nanotubes Studied by Batch, Spectroscopy Technique and Theoretical Calculation
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Different Interaction Mechanisms of Eu(Ⅲ) and ~(243)Am(Ⅲ) with Carbon Nanotubes Studied by Batch, Spectroscopy Technique and Theoretical Calculation

机译：分批，光谱技术和理论计算研究Eu（Ⅲ）和〜（243）Am（Ⅲ）与碳纳米管的不同相互作用机理

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摘要

Herein the sorption of Eu(Ⅲ) and ~(243)Am(Ⅲ) on multiwalled carbon nanotubes (CNTs) are studied, and the results show that Eu(Ⅲ) and ~(243)Am(Ⅲ) could form strong inner-sphere surface complexes on CNT surfaces. However, the sorption of Eu(Ⅲ) on CNTs is stronger than that of ~(243)Am(Ⅲ) on CNTs, suggesting the difference in the interaction mechanisms or properties of Eu(Ⅲ) and ~(243)Arn(Ⅲ) with CNTs, which is quite different from the results of Eu(Ⅲ) and ~(243)Am(Ⅲ) interaction on natural clay minerals and oxides. On the basis of the results of density functional theory calculations, the binding energies of Eu(Ⅲ) on CNTs are much higher than those of ~(243)Am(Ⅲ) on CNTs, indicating that Eu(Ⅲ) could form stronger complexes with the oxygen-containing functional groups of CNTs than ~(243)Am(Ⅲ), which is in good agreement with the experimental results of higher sorption capacity of CNTs for Eu(Ⅲ). The oxygen-containing functional groups contribute significantly to the uptake of Eu(Ⅲ) and ~(243)Am(Ⅲ), and the binding affinity increases in the order of ≡S-OH ＜ ≡S-COOH ＜ ≡S-COO~-. This paper highlights the interaction mechanism of Eu(Ⅲ) and ~(243)Am(Ⅲ) with different oxygen-containing functional groups of CNTs, which plays an important role for the potential application of CNTs in the preconcentration, removal, and separation of trivalent lanthanides and actinides in environmental pollution cleanup.
机译：本文研究了Eu（Ⅲ）和〜（243）Am（Ⅲ）在多壁碳纳米管（CNTs）上的吸附，结果表明Eu（Ⅲ）和〜（243）Am（Ⅲ）可以形成强内碳纳米管表面上的球形表面复合物。但是，Eu（Ⅲ）在CNTs上的吸附作用强于〜（243）Am（Ⅲ）在CNTs上的吸附作用，表明Eu（Ⅲ）和〜（243）Arn（Ⅲ）的相互作用机理或性质存在差异。碳纳米管与天然粘土矿物和氧化物上的Eu（Ⅲ）和〜（243）Am（Ⅲ）相互作用的结果有很大不同。根据密度泛函理论计算的结果，Eu（Ⅲ）在CNTs上的结合能比〜（243）Am（Ⅲ）在CNTs上的结合能高得多，表明Eu（Ⅲ）可以与碳纳米管形成更强的配合物。碳纳米管的含氧官能团比〜（243）Am（Ⅲ）高，这与较高的碳纳米管对Eu（Ⅲ）的吸附能力的实验结果吻合。含氧官能团对Eu（Ⅲ）和〜（243）Am（Ⅲ）的吸收有显着贡献，结合亲和力按≡S-OH＜≡S-COOH＜≡S-COO〜的顺序增加-本文重点介绍了Eu（Ⅲ）和〜（243）Am（Ⅲ）与CNTs的不同含氧官能团的相互作用机理，这对于CNTs的预浓缩，去除和分离中的潜在应用具有重要作用。三价镧系元素和act系元素在环境污染清除中的作用。

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  • 来源
    《Environmental Science & Technology》 |2015年第19期|11721-11728|共8页
  • 作者

    Xiangxue Wang; Shubin Yang; Weiqun Shi; Jiaxing Li; Tasawar Hayat; Xiangke Wang;

  • 作者单位

    School of Environment and Chemical Engineering, North China Electric Power University, Beijing 102206, P. R. China,Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, 215123, P. R. China;

    School of Environment and Chemical Engineering, North China Electric Power University, Beijing 102206, P. R. China,Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, 230031, P. R. China;

    Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, P. R. China;

    School of Environment and Chemical Engineering, North China Electric Power University, Beijing 102206, P. R. China,Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, 230031, P. R. China;

    NAAM Research Group, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia;

    School of Environment and Chemical Engineering, North China Electric Power University, Beijing 102206, P. R. China,NAAM Research Group, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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