IDEAS home Printed from https://ideas.repec.org/a/gam/jijerp/v16y2019i22p4430-d286115.html
   My bibliography  Save this article

Synthesis of Nanoscale Zerovalent Iron (nZVI) Supported on Biochar for Chromium Remediation from Aqueous Solution and Soil

Author

Listed:
  • Haixia Wang

    (School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China
    Shandong Provincial Engineering Technology Research Center for Ecological Carbon Sink and Capture Utilization, Jinan 250022, China)

  • Mingliang Zhang

    (School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China
    Shandong Provincial Engineering Technology Research Center for Ecological Carbon Sink and Capture Utilization, Jinan 250022, China)

  • Hongyi Li

    (School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China)

Abstract

Maize straw biochar-supported nanoscale zero-valent iron composite (MSB-nZVI) was prepared for efficient chromium (Cr) removal through alleviating the aggregation of zero-valent iron particles. The removal mechanism of MSB-nZVI was investigated by scanning electron microscopy with energy dispersive X-ray (SEM-EDX), X-ray diffractometry (XRD), and X-ray photoelectron spectroscopy (XPS). Cr(VI) removal from aqueous solution by MSB-nZVI was greatly affected by pH and initial concentration. The removal efficiency of Cr(VI) decreased with increasing pH, and the removal kinetics followed the pseudo-second-order model. XRD patterns of MSB-nZVI before and after reaction showed that reduction and precipitation/co-precipitation (FeCr 2 O 4 , Fe 3 O 4 , Fe 2 O 3 ) occurred with the conversion of Cr(VI) to Cr(III) and Fe(0) to Fe(II)/Fe(III). The produced precipitation/co-precipitation could be deposited on the MSB surface rather than being only coated on the surface of nZVI particles, which can alleviate passivation of nZVI. For remediation of Cr(VI)-contaminated saline–alkali soil (pH 8.6–9.0, Cr 341 mg/kg), the released amount of Cr(VI) was 70.7 mg/kg, while it sharply decreased to 0.6–1.7 mg/kg at pH 4.0–8.0, indicating that the saline–alkali environment inhibited the remediation efficiency. These results show that MSB-nZVI can be used as an effective material for Cr(VI) removal from aqueous solution and contaminated soil.

Suggested Citation

  • Haixia Wang & Mingliang Zhang & Hongyi Li, 2019. "Synthesis of Nanoscale Zerovalent Iron (nZVI) Supported on Biochar for Chromium Remediation from Aqueous Solution and Soil," IJERPH, MDPI, vol. 16(22), pages 1-15, November.
    • Handle: RePEc:gam:jijerp:v:16:y:2019:i:22:p:4430-:d:286115
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1660-4601/16/22/4430/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1660-4601/16/22/4430/
    Download Restriction: no
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Daixi Zhou & Guangyu Xie & Xinjiang Hu & Xiaoxi Cai & Yunlin Zhao & Xi Hu & Qi Jin & Xiaohua Fu & Xiaofei Tan & Chong Liang & Kaiqi Lai & Hui Wang & Chunfang Tang, 2020. "Coupling of kenaf Biochar and Magnetic BiFeO 3 onto Cross-Linked Chitosan for Enhancing Separation Performance and Cr(VI) Ions Removal Efficiency," IJERPH, MDPI, vol. 17(3), pages 1-17, January.
    2. Muhammad Asaad Bashir & Xiukang Wang & Muhammad Naveed & Adnan Mustafa & Sobia Ashraf & Tayyaba Samreen & Sajid Mahmood Nadeem & Moazzam Jamil, 2021. "Biochar Mediated-Alleviation of Chromium Stress and Growth Improvement of Different Maize Cultivars in Tannery Polluted Soils," IJERPH, MDPI, vol. 18(9), pages 1-24, April.

    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:22:p:4430-:d:286115. 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.