IDEAS home Printed from https://ideas.repec.org/a/gam/jsusta/v16y2024i12p5266-d1419043.html
   My bibliography  Save this article

Potential of Attapulgite/Humic Acid Composites for Remediation of Cd-Contaminated Soil

Author

Listed:
  • Hanru Ren

    (School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
    Gansu Hanxing Environmental Protection Co., Ltd., Lanzhou 730070, China)

  • Jun Ren

    (School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
    Gansu Hanxing Environmental Protection Co., Ltd., Lanzhou 730070, China)

  • Ling Tao

    (School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
    Gansu Hanxing Environmental Protection Co., Ltd., Lanzhou 730070, China)

  • Xuechang Ren

    (School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China)

  • Yunmeng Li

    (School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China)

  • Yuchen Jiang

    (School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China)

  • Mairong Lv

    (College of Resources, Environment and Life Sciences, Ningxia Normal University, Guyuan 756000, China)

Abstract

Stabilizing materials were prepared by different ratios of attapulgite/humic acid composites, and the optimum proportion for the remediation of Cd-polluted soils was found. The results suggested that the bioavailability of Cd in soil was decreased by the application of material prepared with humic acid and attapulgite in a ratio of 1:5. CaCl 2 -Cd, diethylenetriaminepentaacetic acid (DTPA-Cd) and the toxicity characteristic leaching procedure (TCLP-Cd) were reduced by 34.03%, 26.62% and 43.66%, and the ecological risk was depressed accordingly. The addition of stabilizing materials could transform the acid-soluble and reducible speciation to residue speciation, with a ratio of 1:5, significantly increasing the residue proportion of Cd in soil. The content of the residue state was increased by 63.13%, and the content of the acid-soluble state was significantly decreased by 34.10% compared with the control. The bioavailability, acid-soluble and reducible speciation of Cd had a highly negative correlation with the growth of corn, and the accumulation of Cd in corn had a significantly negative correlation with the residue speciation. Attapulgite/humic acid composites can reduce the bioavailability and increase the ratio of residue Cd in soil effectively, and they have the potential to remediate the pollution of heavy metals in soil.

Suggested Citation

  • Hanru Ren & Jun Ren & Ling Tao & Xuechang Ren & Yunmeng Li & Yuchen Jiang & Mairong Lv, 2024. "Potential of Attapulgite/Humic Acid Composites for Remediation of Cd-Contaminated Soil," Sustainability, MDPI, vol. 16(12), pages 1-15, June.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:12:p:5266-:d:1419043
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/2071-1050/16/12/5266/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/2071-1050/16/12/5266/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Deok Hyun Moon & Jinsung An & Sang Hyeop Park & Agamemnon Koutsospyros, 2023. "Remediation of Heavy Metal (Cu, Pb) Contaminated Fine Soil Using Stabilization with Limestone and Livestock Bone Powder," Sustainability, MDPI, vol. 15(14), pages 1-15, July.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Dibya Kanti Datta & Tandra Biswas & Elli Castonguay & Pan Ni, 2024. "Sustainable Stabilizer Derived from Calcium- and Phosphorus-Rich Biowaste for Remediation of Heavy Metal-Contaminated Soil: A Critical Review," Sustainability, MDPI, vol. 16(20), pages 1-26, October.

    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:16:y:2024:i:12:p:5266-:d:1419043. 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.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with 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.