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Biochar Prepared from Steam-Exploded Bitter Melon Vine for the Adsorption of Methylene Blue from Aqueous Solution: Kinetics, Isotherm, Thermodynamics and Mechanism

Author

Listed:
  • Xia Li

    (School of Resources and Environmental Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China)

  • Hongyu Jia

    (Institute of Resources and Environment, Shandong Academy of Agricultural Sciences, Jinan 250100, China)

  • Lihua Jiang

    (School of Resources and Environmental Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China
    Binzhou Jingyang Bio-Fertilizer Industry Co., Ltd., Binzhou 251800, China)

  • Zhengwei Mou

    (Yantai Jereh Oilfield Services Group Co., Ltd., Yantai 264000, China)

  • Bo Zhang

    (School of Resources and Environmental Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China)

  • Zihui Zhang

    (School of Resources and Environmental Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China)

  • Yan Chen

    (School of Resources and Environmental Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China)

Abstract

Bitter melon vine (an agricultural waste product with high fiber content) is difficult to treat and has caused problems in the environment. This research aims to produce biochar through low-temperature pyrolysis assisted by non-polluting steam explosion. The physical and chemical properties of the biochar were characterized using scanning electron microscopy (SEM) images, specific surface area measurements (BET), X-ray diffraction patters (XRD), elemental analysis (EA), and Fourier transform infrared spectroscopy (FTIR). Next, the adsorption mechanism of methylene blue (MB) on the steam-exploded bitter melon vine biochar pyrolyzed at 200 °C (qBC 200 ) and the effects of adsorption time, pH, initial concentration, adsorption temperature, and adsorbent dosage on the adsorption effect were investigated. Steam explosion destroyed the dense structure of the plant, increased the number of oxygen-containing surface functional groups, and improved the adsorption performance of the material. Therefore, qBC 200 more effectively adsorbed MB than untreated biochar, reaching a saturated adsorption capacity of 267.72 mg/g. The MB adsorption kinetics and isothermal adsorption process of qBC 200 align with the pseudo-second-order kinetic model and Langmuir isothermal equation (monolayer adsorption), respectively. The thermodynamic results show that MB adsorbs via a spontaneous, entropy-increasing exothermic reaction. The adsorption mechanism involves electrostatic attraction, hydrogen bonding, and π–π interactions. The prepared biomass with high fiber content is a promising new material for wastewater treatment.

Suggested Citation

  • Xia Li & Hongyu Jia & Lihua Jiang & Zhengwei Mou & Bo Zhang & Zihui Zhang & Yan Chen, 2024. "Biochar Prepared from Steam-Exploded Bitter Melon Vine for the Adsorption of Methylene Blue from Aqueous Solution: Kinetics, Isotherm, Thermodynamics and Mechanism," Sustainability, MDPI, vol. 16(17), pages 1-14, August.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:17:p:7278-:d:1463085
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    References listed on IDEAS

    as
    1. Kawthar Frikha & Lionel Limousy & Muhammad Bilal Arif & Nicolas Thevenin & Lionel Ruidavets & Mohamed Zbair & Simona Bennici, 2021. "Exhausted Grape Marc Derived Biochars: Effect of Pyrolysis Temperature on the Yield and Quality of Biochar for Soil Amendment," Sustainability, MDPI, vol. 13(20), pages 1-17, October.
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