Skip to main content
Log in

Uranium sorption onto mullite: Characteristics of isotherms, kinetics and thermodynamics

  • Published:
Journal of Earth System Science Aims and scope Submit manuscript

Abstract

The sorption of uranium onto mullite influenced by pH, initial adsorbate concentration, sorption dose and reaction duration was probed utilising batch techniques. X-ray powder diffraction was used to characterise mullite. Sorption isotherms, sorption kinetics and thermodynamic characteristics were also investigated. The Freundlich isotherm model could best depict experimental data, suggesting that the sorption mechanism of uranium onto mullite may be multi-layer adsorption. The E value obtained from the Dubinin–Radushkevich model implied that uranium sorption onto mullite is a chemical process. The pseudo-second-order model successfully depicted uranium sorption onto mullite, indicating that the sorption rate is mainly controlled by chemical sorption. The thermodynamic parameters computed showed that entropy and enthalpy under the trial conditions were positive and that values of ΔGϴ were negative. Thermodynamics illustrated that the sorption process was endothermic and spontaneous. The results achieved in this study are intended to further a deeper comprehension of uranium migration in silicate minerals.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8

References

Download references

Acknowledgements

The comments and suggestions of the responsible editors and reviewers during the submission and review of this paper are always appreciated by our team. The National Natural Science Foundation of China (No. 41373120) and the Ministry of Environmental Protection of China (No. 201509024) sustained this research with financial support.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Shi Zeming.

Additional information

Communicated by Pulak Sengupta

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Rong, L., Zeming, S., Yun, H. et al. Uranium sorption onto mullite: Characteristics of isotherms, kinetics and thermodynamics. J Earth Syst Sci 128, 176 (2019). https://doi.org/10.1007/s12040-019-1215-5

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/s12040-019-1215-5

Keywords

Navigation