Phosphorylation of graphehe oxide to improve adsorption of U(VI) from aquaeous solutions


The graphene oxide (GO) was functionalized with phosphate groups and applied as an effective adsorbent for the removal of uranium from aqueous solutions under various environmental conditions (e.g., solution pH, ions strength, contact time and temperature). Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy have confirmed that the phosphorylate group was successfully introduced on the surface of GO. The adsorption experiments indicated that the monolayer adsorption capacity has been increased from 249.38 mg/g (GO) to 336.70 mg/g [phosphorylated graphene oxide (PGO)] calculated by Langmuir model. Moreover, the adsorptive selectivity coefficients S U(VI)/M(x) increase from 42.43 to 51.96% after functionalized with phosphate group. The mechanism of U(VI) absorbed on PGO surface was dominated by surface complexation and electrostatic interaction. The results demonstrate that PGO will be a promising material for the efficient removal of U(VI) in the environment pollution remediation.

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This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 21301028, 11475044, 41461070, 21561002), the Program for Changjiang Scholars and Innovative Research Team in University (Grant No. IRT13054), the Science & Technology Support Program of Jiangxi Province (Grant Nos. 20141BBG70001, 20151BBG70010), the Advanced Science & Technology Innovation Team Program of Jiangxi Province (Grant No. 20142BCB24006), and the Innovation Team Program of Jiangxi Provincial Department of Science and Technology (Grant No. 2014BCB24006).

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Correspondence to Zhibin Zhang or Yunhai Liu.

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Chen, H., Wang, Y., Zhao, W. et al. Phosphorylation of graphehe oxide to improve adsorption of U(VI) from aquaeous solutions. J Radioanal Nucl Chem 313, 175–189 (2017).

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  • Uranium
  • Adsorption
  • Graphene oxide
  • Phosphorylation