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Green Synthesis of MOF-CNF Composite Material for Efficient Removal of Heavy Metals and Antibiotics

Strategic Insights

— 2 min read

Research conducted by the Anhui University of Technology has led to the development of a novel MOF-CNF composite material, utilizing the complementary structure and function of cellulose nanofibers (CNF) and metal-organic frameworks (MOFs), for efficient removal of heavy metals and antibiotics from water bodies. The study's innovative approach involves the application of green ultrasound and freeze-drying technology to prepare the MOF-CNF composite materials, demonstrating significant potential for wastewater treatment. The results showed that the MOF-CNF composite material prepared with a mass ratio of MOF to CNF of 0.2 had the best removal efficiency for tetracycline (TC) and copper (Cu(II)), with an adsorption process conforming to the pseudo-second-order kinetic model, Langmuir and Dubinin-Radushkevich isotherms model.

Key Takeaways:

  • The MOF-CNF composite material demonstrated a significant removal efficiency for tetracycline (TC) and copper (Cu(II)), with an optimal mass ratio of MOF to CNF of 0.2.
  • The adsorption process conformed to the pseudo-second-order kinetic model, Langmuir and Dubinin-Radushkevich isotherms model.
  • Thermodynamic studies indicated that the TC and Cu(II) adsorption was more rapid at higher temperatures, while the coexistence of anions and antibiotics had a negligible influence on the adsorption of TC-Cu by MOF-CNF.
  • Electrostatic interaction, hydrogen bonding, and complexation were identified as the primary mechanisms of TC and Cu(II) adsorption.
  • The MOF-CNF composite material demonstrated excellent antibacterial effectiveness, showcasing its potential for use in wastewater treatment.
  • Life Cycle Assessment (LCA) showed that the structural synergy of MOF-CNF composites reduces overall environmental impact while enhancing sustainability.
  • The study's findings were peer-reviewed and published in the International Journal of Biological Macromolecules.

Statistics:

  • The MOF-CNF composite material achieved a 95.6% removal efficiency for tetracycline (TC) under optimal conditions.
  • The material demonstrated a 90.5% removal efficiency for copper (Cu(II)) under optimal conditions.
  • The pseudo-second-order kinetic model, Langmuir and Dubinin-Radushkevich isotherms model, accurately described the adsorption process.
  • The TC and Cu(II) adsorption was more rapid at higher temperatures, with an activation energy of 51.7 kJ/mol.
  • The MOF-CNF composite material demonstrated excellent antibacterial effectiveness against E. coli, with a 99.9% reduction in bacterial growth.

Sources:

  • Two-step green synthesis of metal organic frameworks-modified cellulose nanofiber for efficient removal of Cu(II) and tetracycline: Experiments, DFT studies, and LCA evaluation. International Journal of Biological Macromolecules, 2025:146203.
  • NewsRx. Anhui University of Technology Reports Findings in Green Synthesis [Two-step green synthesis of metal organic frameworks-modified cellulose nanofiber for efficient removal of Cu(II) and tetracycline: Experiments, DFT studies, and LCA evaluation]. Nanotechnology Weekly. August 4, 2025; p 143.

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