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


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.


TiO2 SiO2 Titration Adsorption Capacity Uranyl 
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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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