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<p>This study explores the potential of a novel polyaniline (PANI)-papaya fiber composite for wastewater remediation via adsorption. The composite was synthesized through an eco-friendly in-situ polymerization method, employing lime juice as a green reaction medium. The structural, morphological and surface properties of the composite were comprehensively characterized using Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Brunauer-Emmett-Teller (BET) analysis and UV-visible spectroscopy. The research focuses on evaluating the adsorption capacity of the PANI-papaya composite for removing aqueous pollutants, highlighting its potential as an effective adsorbent for water treatment applications. BET analysis reveals a lower surface area of 17.8164 m<sup>2</sup> g⁻<sup>1</sup> and a pore volume of 0.0390 cm<sup>3</sup> g⁻<sup>1</sup> for the PANI-papaya fiber composite, indicating its potential for efficient adsorption applications. The sorption analysis shows that the Freundlich isotherm provides the best fit for both rhodamine-B (R<sup>2</sup> = 0.986) and chromate ion (R<sup>2</sup> = 0.988), suggesting a multilayer adsorption process. The adsorption study reveals that the adsorption of both rhodamine B (R<sup>2</sup> = 0.9579) and chromate ion (R<sup>2</sup> = 0.9733) follows pseudo-first-order kinetics, with the process being endothermic. The PANI-papaya fiber composite exhibited remarkable removal efficiency, achieving maximum adsorption efficiencies of 85% and 62% for rhodamine B and chromate ions, respectively, demonstrating its potential as a high-performance adsorbent for targeted water pollutant remediation.</p>

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Investigating the Adsorption Efficacy of PANI- Carica Papaya Linn Fiber Composite for the Removal of Rhodamine-B Dye and Chromate Ions

  • 期刊论文

  • 发表日期：

    2025年8月13日

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  • Shine R. Chandran,
  • Elizabath Johnson,
  • Foumitha Latheef,
  • Fathima Nihas,
  • Raji. R. Krishnan,
  • K. H. Prema

摘要

This study explores the potential of a novel polyaniline (PANI)-papaya fiber composite for wastewater remediation via adsorption. The composite was synthesized through an eco-friendly in-situ polymerization method, employing lime juice as a green reaction medium. The structural, morphological and surface properties of the composite were comprehensively characterized using Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Brunauer-Emmett-Teller (BET) analysis and UV-visible spectroscopy. The research focuses on evaluating the adsorption capacity of the PANI-papaya composite for removing aqueous pollutants, highlighting its potential as an effective adsorbent for water treatment applications. BET analysis reveals a lower surface area of 17.8164 m2 g⁻1 and a pore volume of 0.0390 cm3 g⁻1 for the PANI-papaya fiber composite, indicating its potential for efficient adsorption applications. The sorption analysis shows that the Freundlich isotherm provides the best fit for both rhodamine-B (R2 = 0.986) and chromate ion (R2 = 0.988), suggesting a multilayer adsorption process. The adsorption study reveals that the adsorption of both rhodamine B (R2 = 0.9579) and chromate ion (R2 = 0.9733) follows pseudo-first-order kinetics, with the process being endothermic. The PANI-papaya fiber composite exhibited remarkable removal efficiency, achieving maximum adsorption efficiencies of 85% and 62% for rhodamine B and chromate ions, respectively, demonstrating its potential as a high-performance adsorbent for targeted water pollutant remediation.