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<p>This study used the <i>Jacaranda</i> fruit to prepare biochar, which was then used as an inexpensive adsorbent to remove hexavalent chromium Cr (VI) ions from an aqueous solution. Important biosorption parameters were looked at in the study, such as initial pH (1–3), contact time (5–180&#xa0;min), initial Cr (VI) concentration (10–100&#xa0;mg/L), and adsorbent dosage (0.01–0.40&#xa0;g/50&#xa0;mL), in order to evaluate their effects on the efficacy of biochar (JF-BC) and activated biochar (JF-BC-H<sub>3</sub>PO<sub>4</sub>) in removing Cr (VI) ions from water. The data from FTIR, XRD, and TGA analysis demonstrated that the natures of both adsorbents have the elements required for a successful biosorption. The adsorbent capacity was assessed with several isotherms and kinetic models. Finding the maximum removal efficiency of Cr (VI) onto JF-BC and JF-BC-H<sub>3</sub>PO<sub>4</sub> at an initial pH of 2, an adsorbent dose of 0.15&#xa0;g/50&#xa0;mL, an initial concentration of 50&#xa0;mg/L, and a contact time of three hours yielded the results 192.308 and 208.333&#xa0;mg/L, respectively. The biosorption happened through the coulombic forces adsorption mechanism and followed the pseudo-second order kinetic model. For the CF-BC adsorbent, Langmuir and D-R isotherms and for the JF-BC-H<sub>3</sub>PO<sub>4</sub> adsorbent, Langmuir and Freundlich isotherms best fit the experimental results. Moreover, the thermodynamic analyses indicate that the adsorption process is endothermic and spontaneous. The randomness at the solid–liquid interface was suggested by the positive entropy change.</p>

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Preparation and Adsorption Properties of Biochar Derived from Biomass of Jacaranda mimosifolia Fruit Pod for the Removal of Cr (VI) Ion from Aqueous Solution

  • 期刊论文

  • 发表日期：

    2025年11月5日

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  • Imad Hamadneh,
  • Mohammod A. M. Jukhan,
  • Khawla Damer,
  • Hasan Alkhaza’leh,
  • Hana Hammad,
  • Sawsan Qanadilo,
  • Ammar Hani Al-Dujaili

摘要

This study used the Jacaranda fruit to prepare biochar, which was then used as an inexpensive adsorbent to remove hexavalent chromium Cr (VI) ions from an aqueous solution. Important biosorption parameters were looked at in the study, such as initial pH (1–3), contact time (5–180 min), initial Cr (VI) concentration (10–100 mg/L), and adsorbent dosage (0.01–0.40 g/50 mL), in order to evaluate their effects on the efficacy of biochar (JF-BC) and activated biochar (JF-BC-H3PO4) in removing Cr (VI) ions from water. The data from FTIR, XRD, and TGA analysis demonstrated that the natures of both adsorbents have the elements required for a successful biosorption. The adsorbent capacity was assessed with several isotherms and kinetic models. Finding the maximum removal efficiency of Cr (VI) onto JF-BC and JF-BC-H3PO4 at an initial pH of 2, an adsorbent dose of 0.15 g/50 mL, an initial concentration of 50 mg/L, and a contact time of three hours yielded the results 192.308 and 208.333 mg/L, respectively. The biosorption happened through the coulombic forces adsorption mechanism and followed the pseudo-second order kinetic model. For the CF-BC adsorbent, Langmuir and D-R isotherms and for the JF-BC-H3PO4 adsorbent, Langmuir and Freundlich isotherms best fit the experimental results. Moreover, the thermodynamic analyses indicate that the adsorption process is endothermic and spontaneous. The randomness at the solid–liquid interface was suggested by the positive entropy change.