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An Efficient Strategy for Enhancing the Adsorption Capabilities of Biochar via Sequential KMnO 4 -Promoted Oxidative Pyrolysis and H 2 O 2 Oxidation

Author

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  • Siyao Bian

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

  • Shuang Xu

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

  • Zhibing Yin

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

  • Sen Liu

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

  • Jihui Li

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

  • Shuying Xu

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

  • Yucang Zhang

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

Abstract

In this study, sequential KMnO 4 -promoted oxidative pyrolysis and H 2 O 2 oxidation were employed to upgrade the adsorption capacities of durian shell biochar for methylene blue (MB) and tetracycline (TC) in an aqueous solution. It was found that the KMnO 4 /H 2 O 2 co-modification was greatly influenced by pyrolysis temperature and the optimal temperature was 300 °C. Moreover, a low concentration of H 2 O 2 enabled the improvement of the adsorption capabilities greatly with the catalysis of pre-impregnated manganese oxides, addressing the shortcoming of single H 2 O 2 modification. The co-modified biochar exhibited high adsorption capabilities for MB and TC, remarkably surpassed KMnO 4 - and H 2 O 2 - modified biochars as well as pristine biochar. The increase of adsorption capabilities could be mainly contributed to the incorporation of MnO x and carboxyl by KMnO 4 -promoted oxidative decomposition and Mn-catalyzed H 2 O 2 oxidation. This would provide a novel and efficient method for preparing highly adsorptive biochar using sequential KMnO 4 -promoted oxidative pyrolysis and H 2 O 2 oxidation.

Suggested Citation

  • Siyao Bian & Shuang Xu & Zhibing Yin & Sen Liu & Jihui Li & Shuying Xu & Yucang Zhang, 2021. "An Efficient Strategy for Enhancing the Adsorption Capabilities of Biochar via Sequential KMnO 4 -Promoted Oxidative Pyrolysis and H 2 O 2 Oxidation," Sustainability, MDPI, vol. 13(5), pages 1-12, March.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:5:p:2641-:d:508647
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    Citations

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    Cited by:

    1. Zhichao Shi & Aowen Ma & Yuanhang Chen & Menghan Zhang & Yin Zhang & Na Zhou & Shisuo Fan & Yi Wang, 2023. "The Removal of Tetracycline from Aqueous Solutions Using Peanut Shell Biochars Prepared at Different Pyrolysis Temperatures," Sustainability, MDPI, vol. 15(1), pages 1-15, January.
    2. Mohammad Ghorbani & Reinhard W. Neugschwandtner & Gerhard Soja & Petr Konvalina & Marek Kopecký, 2023. "Carbon Fixation and Soil Aggregation Affected by Biochar Oxidized with Hydrogen Peroxide: Considering the Efficiency of Pyrolysis Temperature," Sustainability, MDPI, vol. 15(9), pages 1-15, April.

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