IDEAS home Printed from https://ideas.repec.org/a/gam/jsusta/v15y2023i16p12387-d1217485.html
   My bibliography  Save this article

Experimental Study on the Solidification of Uranium Tailings and Uranium Removal Based on MICP

Author

Listed:
  • Lin Hu

    (School of Resource & Environment and Safety Engineering, University of South China, Hengyang 421001, China
    Hunan Province Engineering Technology Research Center for Disaster Prediction and Control on Mining Geotechnical Engineering, Hengyang 421001, China)

  • Zhijun Zhang

    (School of Resource & Environment and Safety Engineering, University of South China, Hengyang 421001, China
    Hunan Province Engineering Technology Research Center for Disaster Prediction and Control on Mining Geotechnical Engineering, Hengyang 421001, China)

  • Lingling Wu

    (School of Resource & Environment and Safety Engineering, University of South China, Hengyang 421001, China
    Hunan Province Engineering Technology Research Center for Disaster Prediction and Control on Mining Geotechnical Engineering, Hengyang 421001, China)

  • Qing Yu

    (School of Resource & Environment and Safety Engineering, University of South China, Hengyang 421001, China
    Hunan Province Engineering Technology Research Center for Disaster Prediction and Control on Mining Geotechnical Engineering, Hengyang 421001, China)

  • Huaimiao Zheng

    (School of Economics, Management and Law, University of South China, Hengyang 421001, China)

  • Yakun Tian

    (School of Resource & Environment and Safety Engineering, University of South China, Hengyang 421001, China
    Hunan Province Engineering Technology Research Center for Disaster Prediction and Control on Mining Geotechnical Engineering, Hengyang 421001, China)

  • Guicheng He

    (School of Resource & Environment and Safety Engineering, University of South China, Hengyang 421001, China
    Hunan Province Engineering Technology Research Center for Disaster Prediction and Control on Mining Geotechnical Engineering, Hengyang 421001, China)

Abstract

The governance of uranium tailings aims to improve stability and reduce radionuclide uranium release. In order to achieve this goal, the uranium removal solution test and uranium tailings grouting test were successively carried out using microbially induced calcium carbonate precipitation (MICP) technology. The effect of MICP on the reinforcement of uranium tailings and the synchronous control of radionuclide uranium in the tailings were discussed. The solution test results show that Sporosarcina pasteurii could grow and reproduce rapidly in an acidic medium with an initial pH of 5. The uranium concentration decreased with the increase in MICP reaction time, and the removal efficiency reached 60.9% at 24 h. In the solidification test of tailings, the strength of tailings improved significantly after 12 days of reinforcement, with an increase in the cohesion of tailings by 2.937 times and an increased internal friction angle of 8.393°. The peak stress value of solidified tailings at the surrounding pressure of 50 kPa increased by 1.87 times, and the uranium concentration in the discharge fluid decreased by 76.91% compared to the blank group. This study provides valuable insights and references for safely disposing of uranium tailings.

Suggested Citation

  • Lin Hu & Zhijun Zhang & Lingling Wu & Qing Yu & Huaimiao Zheng & Yakun Tian & Guicheng He, 2023. "Experimental Study on the Solidification of Uranium Tailings and Uranium Removal Based on MICP," Sustainability, MDPI, vol. 15(16), pages 1-15, August.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:16:p:12387-:d:1217485
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/2071-1050/15/16/12387/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/2071-1050/15/16/12387/
    Download Restriction: no
    ---><---

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jsusta:v:15:y:2023:i:16:p:12387-:d:1217485. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.