IDEAS home Printed from https://ideas.repec.org/a/gam/jijerp/v19y2022i18p11247-d909052.html
   My bibliography  Save this article

Harmless Treatment of High Arsenic Tin Tailings and Environmental Durability Assessment

Author

Listed:
  • Weiwei Zhao

    (Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China)

  • Zhengfu Zhang

    (Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China)

  • Hui Yang

    (Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China)

  • Xian Zhou

    (Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
    Kunming Metallurgical Research Institute Co., Ltd., Kunming 650031, China)

  • Jinsong Wang

    (Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China)

  • Chengping Li

    (Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China)

Abstract

The treatment of arsenic (As) in tin tailings (TT) has been an urgent environmental problem, and stabilization/solidification (S/S) treatment is considered an effective technology to eliminate contamination of As. In this study, we developed a low-carbon and low-alkalinity material to S/S of As, and the results showed that the leaching concentration of As after treatment was lower than the Chinese soil environmental quality standard (0.1 mg/L). Based on a series of characterization tests, we found that OH − promoted the dissolution of As(III)-S, Fe-As(V), and amorphous As(III)-O species and formed Ca-As(III) and Ca-(V) species with Ca 2+ . Simultaneously, hydration produces calcium silicate hydrate (C-S-H) gel and ettringite by the form of adsorption and ion exchange to achieve S/S of As. We also assessed the durability of this material to acidity and temperature, and showed that the leaching concentration of As was below 0.1 mg/L at pH = 1–5 and temperature 20–60 °C. The method proposed in this study, S/S of As, has excellent effect and environmental durability, providing a new solution for harmless treatment of TT and its practical application.

Suggested Citation

  • Weiwei Zhao & Zhengfu Zhang & Hui Yang & Xian Zhou & Jinsong Wang & Chengping Li, 2022. "Harmless Treatment of High Arsenic Tin Tailings and Environmental Durability Assessment," IJERPH, MDPI, vol. 19(18), pages 1-14, September.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:18:p:11247-:d:909052
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1660-4601/19/18/11247/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1660-4601/19/18/11247/
    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:jijerp:v:19:y:2022:i:18:p:11247-:d:909052. 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.