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Adsorption of thorium(IV) on magnetic multi-walled carbon nanotubes

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  • Special Topic: Chemical Challenges in Nuclear Fuel Cycle
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Abstract

The influences of pH, contact time, solid-liquid ratio, temperature and C60(C(COOH)2) n on Th(IV) adsorption onto the magnetic multi-walled carbon nanotubes (MMWCNTs) were studied by batch technique. The dynamic process showed that the adsorption of Th(IV) onto MMWCNTs could reach equilibrium in 40 h and matched the pseudo-second-order kinetics model. The adsorption of Th(IV) onto MMWCNTs was significantly dependent on pH values, the adsorption ratio increased markedly at pH 3.0–5.0, and then maintained a steady state as pH values increased. At low pH, different C60(C(COOH)2) n content could enhance the adsorption content of Th(IV) onto MMWCNTs, but restrained it at higher pH. Through simulating the adsorption isotherms by Langmuir, Freundlich and Dubini-Radushkevich models, it could be seen respectively that the adsorption pattern of Th(IV) onto MMWCNTs was mainly surface complexation, and that the adsorption process was endothermic and irreversible.

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Authors and Affiliations

  1. Radiochemistry Laboratory, Lanzhou University, Lanzhou, 730000, China

    Peng Liu, Wei Qi, YaoFang Du, Jing Wang, JuanJuan Bi & WangSuo Wu

  2. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China

    Zhan Li

  3. State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, China

    WangSuo Wu

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  1. Peng Liu
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  2. Wei Qi
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  4. Zhan Li
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  7. WangSuo Wu
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Correspondence to WangSuo Wu.

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Liu, P., Qi, W., Du, Y. et al. Adsorption of thorium(IV) on magnetic multi-walled carbon nanotubes. Sci. China Chem. 57, 1483–1490 (2014). https://doi.org/10.1007/s11426-014-5204-x

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  • DOI: https://doi.org/10.1007/s11426-014-5204-x

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