Startseite Diatomite modified by TiO2 for adsorption of U(VI)
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Diatomite modified by TiO2 for adsorption of U(VI)

  • Ni Yuan , Peng Liu und Wangsuo Wu EMAIL logo
Veröffentlicht/Copyright: 19. Mai 2018
Radiochimica Acta
Aus der Zeitschrift Radiochimica Acta Band 106 Heft 9

Abstract

Diatomite was modified with TiO2. The synthesized materials were characterized and used for removal of U(VI) from aqueous solutions. The influences of pH, contact time and temperature on U(VI) adsorption onto TiO2@diatomite were studied by batch technique, and X-ray photoelectron spectroscopy (XPS) was employed to analyze the experimental data. We compared the adsorption of U(VI) onto natural diatomite, TiO2 and TiO2@diatomite made by sol-gel method. The dynamic process showed that the adsorption of U(VI) onto TiO2@diatomite matched the pseudo-second-order kinetics model, and the adsorption of U(VI) was significantly dependent on pH values. Through simulating the adsorption isotherms by Langmuir, Freundlich and Dubini–Radushkevich (D–R) models, respectively, it could be seen that the adsorption patterns of U(VI) onto TiO2@diatomite were mainly controlled by surface complexation, and the adsorption processes were endothermic and spontaneous. The modification of diatomite by TiO2 shows a novel material for removing U(VI) from water environment for industrialized application.

Keywords: Diatomite; adsorption; U(VI); TiO2; XPS

Acknowledgments

Supported by the National Natural Science Foundation of China (21327801, 41573128, 21601179), the China Postdoctoral Science Foundation (2016M590981) and Fundamental Research Funds for the Central University (lzujbky-2015-70).

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Received: 2018-01-05
Accepted: 2018-04-02
Published Online: 2018-05-19
Published in Print: 2018-09-25

©2018 Walter de Gruyter GmbH, Berlin/Boston

Artikel in diesem Heft

  1. Frontmatter
  2. Measurement of cross sections and isomeric cross-section ratios for the (n,2n) reactions on 85,87Rb in energies between 13 and 15 MeV
  3. Adsorptive extraction of uranium (VI) from seawater using dihydroimidazole functionalized multiwalled carbon nanotubes
  4. Diatomite modified by TiO2 for adsorption of U(VI)
  5. Production and separation of no-carrier-added 181−184Re radioisotopes from proton irradiated tungsten target
  6. Radioiodinated celiprolol as a new highly selective radiotracer for β1-adrenoceptor-myocardial perfusion imaging
  7. Determination of the Sr/Ca ratio of tooth samples by photoactivation analysis in Southern Turkey
  8. Thermal neutron activation analysis of some toxic and trace chemical element contents in Mentha pulegium L.
  9. Thermal decomposition of un-irradiated and γ-ray irradiated holmium acetate tetrahydrate. Part 1: kinetics of nonisothermal dehydration of un-irradiated and γ-ray irradiated Ho(CH3COO)3⋅4H2O
  10. Study of radiotoxic 210Po in Indian tobacco using liquid scintillation spectrometry
  11. Preliminary investigations on reducing the high radiation risk level of TENORM scale waste from petroleum industry
https://doi.org/10.1515/ract-2018-2923
Schlagwörter für diesen Artikel
Diatomite; adsorption; U(VI); TiO2; XPS

Artikel in diesem Heft

  1. Frontmatter
  2. Measurement of cross sections and isomeric cross-section ratios for the (n,2n) reactions on 85,87Rb in energies between 13 and 15 MeV
  3. Adsorptive extraction of uranium (VI) from seawater using dihydroimidazole functionalized multiwalled carbon nanotubes
  4. Diatomite modified by TiO2 for adsorption of U(VI)
  5. Production and separation of no-carrier-added 181−184Re radioisotopes from proton irradiated tungsten target
  6. Radioiodinated celiprolol as a new highly selective radiotracer for β1-adrenoceptor-myocardial perfusion imaging
  7. Determination of the Sr/Ca ratio of tooth samples by photoactivation analysis in Southern Turkey
  8. Thermal neutron activation analysis of some toxic and trace chemical element contents in Mentha pulegium L.
  9. Thermal decomposition of un-irradiated and γ-ray irradiated holmium acetate tetrahydrate. Part 1: kinetics of nonisothermal dehydration of un-irradiated and γ-ray irradiated Ho(CH3COO)3⋅4H2O
  10. Study of radiotoxic 210Po in Indian tobacco using liquid scintillation spectrometry
  11. Preliminary investigations on reducing the high radiation risk level of TENORM scale waste from petroleum industry
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