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<p>In this study, three iron-functionalized carbonaceous bio-composites—JP@Fe, BP@Fe, and WH@Fe—were synthesized using jackfruit peel, banana peel, and water hyacinth, respectively, and evaluated for their effectiveness in removing arsenic species [As(III) and As(V)] from aqueous solutions. The composites were thoroughly characterized using various physicochemical techniques. Batch adsorption experiments were conducted to assess the influence of pH, contact time, initial arsenic concentration, and adsorbent dosage on removal efficiency. Among the composites, JP@Fe exhibited superior performance, achieving maximum removal efficiencies of 97.3% for As(III) and 98.2% for As(V) under optimized conditions. Adsorption was most effective at near-neutral pH (pH 7), and the equilibrium data best fitted the Langmuir isotherm model, with monolayer adsorption capacities of 6.41&#xa0;mg/g for As(III) and 6.62&#xa0;mg/g for As(V). Kinetic analysis indicated that the adsorption followed a pseudo-second-order model, suggesting a chemisorption-dominated mechanism. Spectroscopic investigations (XPS and FTIR) confirmed the involvement of electrostatic interactions, hydrogen bonding, and redox reactions in the adsorption process. Furthermore, the composites demonstrated appreciable reusability, retaining significant adsorption capacity over five regeneration cycles. These highlight the efficacy of iron-modified bio-composites as sustainable and cost-effective adsorbents for arsenic removal and the potential of JP@Fe shows a sustainable, low-cost, and efficient adsorbent for arsenic remediation in contaminated water systems.</p> Graphical Abstract <p>Schematic representation of the synthesis of eco-friendly and cost-effective Fe-modified carbonaceous composites from biomass and their application in the removal of arsenic from contaminated water.</p> <p></p>

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Sustainable and Cost-Effective Fe-Modified Biomass-Derived Carbonaceous Composites for Enhanced Arsenic Removal from Aqueous Media

  • 期刊论文

  • 发表日期：

    2026年2月10日

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  • Rupkamal Chetia,
  • Pranjit Boruah,
  • Dhruba Jyoti Sonowal,
  • Bikashjyoti Gohain,
  • Shrutipriya Devi,
  • Binod Pokhrel,
  • Shreemoyee Bordoloi,
  • Prashurya Pritam Mudoi,
  • Surajit Konwer

摘要

In this study, three iron-functionalized carbonaceous bio-composites—JP@Fe, BP@Fe, and WH@Fe—were synthesized using jackfruit peel, banana peel, and water hyacinth, respectively, and evaluated for their effectiveness in removing arsenic species [As(III) and As(V)] from aqueous solutions. The composites were thoroughly characterized using various physicochemical techniques. Batch adsorption experiments were conducted to assess the influence of pH, contact time, initial arsenic concentration, and adsorbent dosage on removal efficiency. Among the composites, JP@Fe exhibited superior performance, achieving maximum removal efficiencies of 97.3% for As(III) and 98.2% for As(V) under optimized conditions. Adsorption was most effective at near-neutral pH (pH 7), and the equilibrium data best fitted the Langmuir isotherm model, with monolayer adsorption capacities of 6.41 mg/g for As(III) and 6.62 mg/g for As(V). Kinetic analysis indicated that the adsorption followed a pseudo-second-order model, suggesting a chemisorption-dominated mechanism. Spectroscopic investigations (XPS and FTIR) confirmed the involvement of electrostatic interactions, hydrogen bonding, and redox reactions in the adsorption process. Furthermore, the composites demonstrated appreciable reusability, retaining significant adsorption capacity over five regeneration cycles. These highlight the efficacy of iron-modified bio-composites as sustainable and cost-effective adsorbents for arsenic removal and the potential of JP@Fe shows a sustainable, low-cost, and efficient adsorbent for arsenic remediation in contaminated water systems.

Graphical Abstract

Schematic representation of the synthesis of eco-friendly and cost-effective Fe-modified carbonaceous composites from biomass and their application in the removal of arsenic from contaminated water.