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Journal of Radioanalytical and Nuclear Chemistry

, Volume 190, Issue 1, pp 155–166 | Cite as

The sorption of uranyl ions on silica-titania mixed-hydroxide gels

  • Song Yinjie
  • Zhang Hui
  • Li Fuliang
  • Yang Qiaolin
Article

Abstract

SiO2−TiO2 mixed hydroxide gels were prepared and the apparent adsorption capacity for Na+ (1.30–1.60 mmol/g dry sample) determined by pH titration. The effect of solution pH on the sorption ability of the binary gels was studied. It is found that: (1) the sorption mechanism depends upon the pH, and the two most important factors are the nature of both counter ions in bulk solution and the surface of silica-titania gels, (2) the best pH range for the sorption of uranyl ions is 4–7. The thermodynamic functions were evaluated, suggesting that the\(\bar H/UO_2^{2 + } \) reaction is chiefly attributed to physical adsorption rather than chemical one, and the opposite is the case of the\(\overline {UO} _2 /H^ + \) reaction.

Keywords

TiO2 SiO2 Titration Adsorption Capacity Uranyl 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Akadémiai Kiadó 1995

Authors and Affiliations

  • Song Yinjie
    • 1
  • Zhang Hui
    • 1
  • Li Fuliang
    • 1
  • Yang Qiaolin
    • 1
  1. 1.Department of Modern PhysicsLanzhou UniversityLanzhou, Gansu Province(P.R. China)

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