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Characterization of radioactive cobalt on graphene oxide by macroscopic and spectroscopic techniques

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Abstract

Graphene oxide (GO) was synthesized using the modified Hummers method and characterized by XRD and FTIR. The sorption of 60Co(II) on GO as a function of contact time, pH, polyacrylic acid, ionic strength, temperature and solution concentration was studied by batch technique. The sorption kinetics indicated that the sorption of 60Co(II) on GO could be simulated by the pseudo-second-order model very well. The maximum sorption capacities of GO for 60Co(II) calculated from Langmuir model at pH 6.40 and T = 300 K was ~62.0 mg/g. The thermodynamic parameters from the temperature-dependent sorption isotherms indicated that the 60Co(II) sorption on GO was an endothermic and spontaneous process. The interaction mechanism between GO and Co(II) were outer-sphere surface complexation or ion exchange at pH <7, whereas the inner-sphere surface complexation was observed at pH 7–9 in terms of the analysis of XPS spectra.

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Change history

  • 07 May 2019

    Figure��1a has been published incorrectly in the original article in which there is a mistake in characterization of graphene oxide (XRD pattern) due to the odd repetition of background. The correct version of Fig.��1a is provided in this correction.

  • 07 May 2019

    Figure��1a has been published incorrectly in the original article in which there is a mistake in characterization of graphene oxide (XRD pattern) due to the odd repetition of background. The correct version of Fig.��1a is provided in this correction.

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Acknowledgments

Financial support from National Natural Science Foundation of China (21207135, 21071147, 21071107, 91126020), and Hefei Center for Physical Science and Technology (2012FXZY005) is acknowledged.

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Correspondence to Yubing Sun.

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Jin, Z., Sheng, J. & Sun, Y. Characterization of radioactive cobalt on graphene oxide by macroscopic and spectroscopic techniques. J Radioanal Nucl Chem 299, 1979–1986 (2014). https://doi.org/10.1007/s10967-013-2918-8

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  • DOI: https://doi.org/10.1007/s10967-013-2918-8

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