Chinese Journal of Applied Chemistry ›› 2021, Vol. 38 ›› Issue (6): 658-667.DOI: 10.19894/j.issn.1000-0518.200360

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Synthesis of Phosphorylated Xanthan Gum/Graphene Oxide and Its Selective Adsorption of Uranium

LIU Wen-Bin, YANG Sha-Sha, HUANG Guo-Lin*, FAN Li-Jiao, XIE Yu-Ming   

  1. National Defense Key Discipline Laboratory of Radioactive Geology and Exploration Technology, East China University of Technology, Nanchang 330013, China
  • Received:2020-12-02 Revised:2021-02-17 Published:2021-06-01 Online:2021-08-01
  • Supported by:
    National Natural Science Foundation of China (No.21866005), Jiangxi Key Plan of Research and Development (No.20192BBH80011)

Abstract: The preparation of a novel phosphate-functionalized xanthan gum/graphene oxide (P-XG/GO) which is cross-linked with xanthan gum and functionalized with phosphoric acid was investigated for the selective adsorption of uranium from aqueous solutions in this study. The results from scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR) and Zeta potential analysis confirm that the cross-linking and phosphorylation modification are successful in our experiment. The effects of factors such as solution pH, initial concentration, adsorption time and temperature on the adsorption performance were studied and the most suitable adsorption conditions were obtained. The Langmuir isotherm model for adsorption data is well fitted, and the maximum adsorption capacity is 495.05 mg/g. Compared with the pseudo-first-order kinetic model, the pseudo-second-order kinetic model better fits the adsorption process.

Key words: Xanthan gum, Graphene oxide, Selective adsorption, Uranium

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