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Adsorption of Hexavalent Chromium Using Banana Pseudostem Biochar and Its Mechanism

Author

Listed:
  • Shuang Xu

    (Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, College of Materials and Chemical Engineering, Hainan University, Haikou 570228, China)

  • Weiguang Yu

    (Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, College of Materials and Chemical Engineering, Hainan University, Haikou 570228, China)

  • Sen Liu

    (Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, College of Materials and Chemical Engineering, Hainan University, Haikou 570228, China)

  • Congying Xu

    (Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, College of Materials and Chemical Engineering, Hainan University, Haikou 570228, China)

  • Jihui Li

    (Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, College of Materials and Chemical Engineering, Hainan University, Haikou 570228, China)

  • Yucang Zhang

    (Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, College of Materials and Chemical Engineering, Hainan University, Haikou 570228, China)

Abstract

A low-cost biochar was prepared through slow pyrolysis of banana pseudostem biowaste at different temperatures, and characterized by surface area and porosity analysis, scanning electron microscopy (SEM), Fourier-transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). It was shown that the biochar prepared at low pyrolysis temperature was rich in oxygen-containing groups on the surface. Adsorption experiments revealed that the biochar prepared at 300 °C (BB300) was the best adsorbent for Cr(VI) with 125.44 mg/g maximum adsorption capacity at pH 2 and 25 °C. All the adsorption processes were well described by pseudo-second-order and Langmuir models, indicating a monolayer chemiadsorption. Furthermore, it was demonstrated that adsorption of Cr(VI) was mainly attributed to reduction of Cr(VI) to Cr(III) followed by ion exchange and complexation with the biochar.

Suggested Citation

  • Shuang Xu & Weiguang Yu & Sen Liu & Congying Xu & Jihui Li & Yucang Zhang, 2018. "Adsorption of Hexavalent Chromium Using Banana Pseudostem Biochar and Its Mechanism," Sustainability, MDPI, vol. 10(11), pages 1-12, November.
    • Handle: RePEc:gam:jsusta:v:10:y:2018:i:11:p:4250-:d:183530
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    Citations

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    Cited by:

    1. Sokkeang Be & Soydoa Vinitnantharat & Anawat Pinisakul, 2021. "Effect of Mangrove Biochar Residue Amended Shrimp Pond Sediment on Nitrogen Adsorption and Leaching," Sustainability, MDPI, vol. 13(13), pages 1-19, June.
    2. Heng Wei & Jiankun Sun & Bin Zhang & Rongzhan Liu, 2020. "Comparative Study of Cationic Dye Adsorption Using Industrial Latex Sludge with Sulfonate and Pyrolysis Treatment," Sustainability, MDPI, vol. 12(23), pages 1-14, December.

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