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Preparation and Characterization of Fe-Mn Binary Oxide/Mulberry Stem Biochar Composite Adsorbent and Adsorption of Cr(VI) from Aqueous Solution

Author

Listed:
  • Meina Liang

    (College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
    Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin 541004, China)

  • Shuiping Xu

    (College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China)

  • Yinian Zhu

    (College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
    Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin 541004, China)

  • Xu Chen

    (College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China)

  • Zhenliang Deng

    (College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China)

  • Liling Yan

    (College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China)

  • Huijun He

    (College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
    Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin 541004, China)

Abstract

This study details the preparation of Fe-Mn binary oxide/mulberry stem biochar composite adsorbent (FM-MBC) from mulberry stems via the multiple activation by potassium permanganate, ferrous chloride, triethylenetetramine, and epichlorohydrin. The characteristics of FM-MBC had been characterized by SEM-EDS, BET, FT-IR, XRD, and XPS, and static adsorption batch experiments such as pH, adsorption time, were carried out to study the mechanism of Cr(VI) adsorption on FM-MBC and the impact factors. The results indicated that in contrast with the mulberry stem biochar (MBC), the FM-MBC has more porous on surface with a BET surface area of 74.73 m 2 /g, and the surface loaded with α-Fe 2 O 3 and amorphization of MnO 2 particles. Besides, carboxylic acid, hydroxyl, and carbonyls functional groups were also formed on the FM-MBC surface. At the optimal pH 2.0, the maximum adsorption capacity for Cr(VI) was calculated from the Langmuir model of 28.31, 31.02, and 37.14 mg/g at 25, 35, and 45 °C, respectively. The aromatic groups, carboxyls, and the hydroxyl groups were the mainly functional groups in the adsorption of Cr(VI). The mechanism of the adsorption process of FM-MBC for Cr(VI) mainly involves electrostatic interaction, surface adsorption of Cr(VI) on FM-MBC, and ion exchange.

Suggested Citation

  • Meina Liang & Shuiping Xu & Yinian Zhu & Xu Chen & Zhenliang Deng & Liling Yan & Huijun He, 2020. "Preparation and Characterization of Fe-Mn Binary Oxide/Mulberry Stem Biochar Composite Adsorbent and Adsorption of Cr(VI) from Aqueous Solution," IJERPH, MDPI, vol. 17(3), pages 1-16, January.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:3:p:676-:d:311292
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    Cited by:

    1. Ming-hao Li & Xue-yan Gao & Can Li & Chun-long Yang & Chang-ai Fu & Jie Liu & Rui Wang & Lin-xu Chen & Jian-qiang Lin & Xiang-mei Liu & Jian-qun Lin & Xin Pang, 2020. "Isolation and Identification of Chromium Reducing Bacillus Cereus Species from Chromium-Contaminated Soil for the Biological Detoxification of Chromium," IJERPH, MDPI, vol. 17(6), pages 1-13, March.

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