Nanofibers Show Promise in Dye Removal from Aqueous Solutions

Strategic Insights -

Researchers at the Huazhong University of Science and Technology have synthesized polyaniline-based cellulose nanofibers via electron beam radiation and combined them with sodium alginate to create a polyaniline-based cellulose-sodium alginate composite gel. This gel was used to adsorb methylene blue from aqueous solutions, with the researchers investigating the effects of various parameters, including temperature, contact time, ionic strength, pH, and reusability.

The optimal radiation dose for synthesizing polyaniline-based cellulose was determined to be 70 kGy, and the adsorption kinetics of MB by the PNC gel followed a pseudosecond-order model. The study found that ionic strength had no significant impact on MB adsorption, whereas pH played a critical role, with optimal adsorption observed at pH 7. The PNC gel also demonstrated excellent reusability, highlighting its potential for practical applications in dye removal.

Key Takeaways:

  • The researchers synthesized polyaniline-based cellulose nanofibers via electron beam radiation and combined them with sodium alginate to create a composite gel.
  • The optimal radiation dose for synthesizing polyaniline-based cellulose was found to be 70 kGy.
  • The adsorption kinetics of MB by the PNC gel followed a pseudosecond-order model.
  • Ionic strength had no significant impact on MB adsorption, while pH played a critical role, with optimal adsorption observed at pH 7.
  • The PNC gel demonstrated excellent reusability, with over 90% of MB adsorbed in 5 cycles.
  • The study provides valuable insights into the development of efficient adsorbents for the treatment of dye-contaminated wastewater.
  • The PNC gel has the potential for practical applications in dye removal.

Statistics:

  • 70 kGy: the optimal radiation dose for synthesizing polyaniline-based cellulose.
  • 5 cycles: the number of cycles where the PNC gel demonstrated excellent reusability, with over 90% of MB adsorbed.
  • 90%: the percentage of MB adsorbed in 5 cycles.
  • 28.95 kJ/mol: the enthalpy change of the adsorption process.
  • 122.13 J/mol*K: the entropy change of the adsorption process.
  • Spontaneous and endothermic adsorption: the nature of the adsorption process.
  • pH 7: the optimal pH for MB adsorption.

Sources:

  • Study On Radiation-induced Polyaniline-based Cellulose Gel and Its Adsorption of Methylene Blue. Separation and Purification Technology, 2025;364.
  • NewsRx. New Nanofibers Study Findings Reported from Huazhong University of Science and Technology (Study On Radiation-induced Polyaniline-based Cellulose Gel and Its Adsorption of Methylene Blue). Nanotechnology Weekly. September 1, 2025; p 1978.