Nanocomposite Hydrogel Shows Enhanced Dye Adsorption Capacity for Wastewater Treatment

Strategic Insights -

Research conducted by the Dr. B.R. Ambedkar National Institute of Technology has led to the development of a novel nanocomposite hydrogel, synthesized via chemical cross-linking of pectin, pullulan, and NaOH-intercalated kaolinite. The resulting hydrogel exhibited enhanced mechanical integrity, superior swelling capacity, and excellent dye adsorption performance. Adsorption studies demonstrated high removal efficiencies of 93.8% for Crystal Violet (CV) and 84.8% for Congo Red (CR) under specific conditions.

Key Takeaways:

  • The nanocomposite hydrogel was synthesized via chemical cross-linking of pectin, pullulan, and NaOH-intercalated kaolinite, resulting in enhanced mechanical integrity and superior swelling capacity.
  • The hydrogel exhibited excellent dye adsorption performance, with a removal efficiency of 93.8% for CV and 84.8% for CR under specific conditions.
  • Adsorption isotherm and kinetic data were best described by the Langmuir model and pseudo-second-order kinetics, respectively.
  • Thermodynamic analysis confirmed the exothermic and spontaneous nature of dye adsorption.
  • The nanocomposite hydrogel demonstrated a high adsorption capacity, with a q of 205.57 mg/g for CV and 689.65 mg/g for CR.
  • The study highlights the efficiency of the PC/PL/KaO hydrogels for dye removal in wastewater treatment applications.

Statistics:

  • The hydrogel exhibited a swelling capacity of 1797%.
  • The removal efficiency for CV was 93.8% under specific conditions.
  • The removal efficiency for CR was 84.8% under specific conditions.
  • The adsorption capacity for CV was 205.57 mg/g.
  • The adsorption capacity for CR was 689.65 mg/g.
  • Adsorption studies were carried out under varying experimental parameters, including initial dye concentration, solution pH, temperature, adsorbent dosage, ionic strength, and contact time.

Sources:

  • Enhanced dye adsorption via pectin/pullulan/kaolinite nanocomposite for wastewater treatment applications. International Journal of Biological Macromolecules, 2025;319:145557.
  • Dr. B.R. Ambedkar National Institute of Technology.
  • Elsevier.

References:

  • International Journal of Biological Macromolecules.
  • Elsevier.

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