IDEAS home Printed from https://ideas.repec.org/a/gam/jijerp/v16y2019i24p4999-d295647.html
   My bibliography  Save this article

A Soluble Humic Substance for the Simultaneous Removal of Cadmium and Arsenic from Contaminated Soils

Author

Listed:
  • Dongxue Bi

    (Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, Shandong, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

  • Guodong Yuan

    (School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China)

  • Jing Wei

    (Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, Shandong, China)

  • Liang Xiao

    (Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, Shandong, China)

  • Lirong Feng

    (Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, Shandong, China)

  • Fande Meng

    (College of Resource and Environment, Anhui Science and Technology University, Chuzhou 233100, China)

  • Jie Wang

    (Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, Shandong, China)

Abstract

With abundant oxygen-containing functional groups, a humic substance (HS) has a high potential to remediate soils contaminated by heavy metals. Here, HS was first extracted from a leonardite and analyzed for its chemical compositions and spectroscopic characteristics. Then it was assessed for its ability as a washing agent to remove Cd and As from three types of soils (red soil, black soil, and fluvo-aquic soil) that were spiked with those contaminants (Cd: 40.5–49.1 mg/kg; As: 451–584 mg/kg). The operational washing conditions, including the pH and concentration of the HS, washing time and cycles, and liquid–soil ratio, were assessed for Cd and As removal efficiency. At pH 7, with an HS concentration (3672 mg C/L) higher than its critical micelle concentration and a liquid–soil ratio of 30, a single washing for 6–12 h removed 41.9 mg Cd/kg and 199.3 mg As/kg from red soil, 33.5 mg Cd/kg and 291.5 mg As/kg from black soil, and 30.4 mg Cd/kg and 325.5 mg As/kg from fluvo-aquic soil. The removal of Cd and As from the contaminated soils involved the complexation of Cd and As with the carboxyl and phenolic groups of HS. Outcomes from this research could be used to develop a tailor-made HS washing agent for the remediation of Cd- and As-contaminated soils with different properties.

Suggested Citation

  • Dongxue Bi & Guodong Yuan & Jing Wei & Liang Xiao & Lirong Feng & Fande Meng & Jie Wang, 2019. "A Soluble Humic Substance for the Simultaneous Removal of Cadmium and Arsenic from Contaminated Soils," IJERPH, MDPI, vol. 16(24), pages 1-12, December.
    • Handle: RePEc:gam:jijerp:v:16:y:2019:i:24:p:4999-:d:295647
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1660-4601/16/24/4999/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1660-4601/16/24/4999/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Fande Meng & Guodong Yuan & Steven L. Larson & John H. Ballard & Jeremy R. White & Zikri Arslan & Fengxiang X. Han, 2019. "Kinetics and Thermodynamics of Uranium (VI) Adsorption onto Humic Acid Derived from Leonardite," IJERPH, MDPI, vol. 16(9), pages 1-12, May.
    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.

      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:16:y:2019:i:24:p:4999-:d:295647. 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.