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Radioactive Cobalt(II) Removal from Aqueous Solutions Using a Reusable Nanocomposite: Kinetic, Isotherms, and Mechanistic Study

Author

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  • Xiaotao Zhang

    (College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China
    College of Material Science and Art Design, Inner Mongolia Agricultural University, Hohhot 010018, China)

  • Ximing Wang

    (College of Material Science and Art Design, Inner Mongolia Agricultural University, Hohhot 010018, China)

  • Zhangjing Chen

    (Department of Sustainable Biomaterials Virginia Tech University, Blacksburg, VA 24061, USA)

Abstract

A lignocellulose/montmorillonite (LMT) nanocomposite was prepared as a reusable adsorbent for cobalt(II) ions, and characterized by nitrogen (N 2 ) adsorption/desorption isotherm, X-ray Diffraction (XRD), Scanning Electron Microscope (SEM), Transmission Electron Microscopy (TEM), and Fourier Transform Infrared Spectroscopy (FTIR). LMT exhibited efficient adsorption of cobalt ions (Co(II)), and the adsorbed Co(II) was readily desorbed by nitric acid (HNO 3 ). All parameters affecting the adsorption and/or desorption of Co(II), including initial Co(II) concentration, pH value, temperature, HNO 3 concentration, and time, were optimized. The kinetic data analysis showed that the adsorption followed the pseudo-second-order kinetic model and fit well into the Langmuir isotherm equation. Notably, the nanocomposite can be used four times without significantly losing adsorbent capability. The Energy-Dispersive X-ray (EDX) and FTIR spectra analysis also revealed that the adsorption mechanism may be mainly a chemical adsorption dominated process.

Suggested Citation

  • Xiaotao Zhang & Ximing Wang & Zhangjing Chen, 2017. "Radioactive Cobalt(II) Removal from Aqueous Solutions Using a Reusable Nanocomposite: Kinetic, Isotherms, and Mechanistic Study," IJERPH, MDPI, vol. 14(12), pages 1-19, November.
    • Handle: RePEc:gam:jijerp:v:14:y:2017:i:12:p:1453-:d:120267
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    References listed on IDEAS

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    1. Xiufeng Han & Xinwei Lu & Qinggeletu & Yongfu Wu, 2017. "Health Risks and Contamination Levels of Heavy Metals in Dusts from Parks and Squares of an Industrial City in Semi-Arid Area of China," IJERPH, MDPI, vol. 14(8), pages 1-12, August.
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    Cited by:

    1. Li Liu & Shisuo Fan & Yang Li, 2018. "Removal Behavior of Methylene Blue from Aqueous Solution by Tea Waste: Kinetics, Isotherms and Mechanism," IJERPH, MDPI, vol. 15(7), pages 1-16, June.

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