Electrospinning Membrane with Polyacrylate Mixed Beta-Cyclodextrin: An Efficient Adsorbent for Cationic Dyes

Area of Science:

• Materials Science
• Environmental Chemistry
• Nanotechnology

Background:

• Wastewater contamination by cationic dyes poses environmental challenges.
• Development of efficient and recyclable adsorbents is crucial for dye removal.
• Non-chemical binding adsorbents offer sustainable alternatives for wastewater treatment.

Purpose of the Study:

• To synthesize and characterize beta-cyclodextrin/polyacrylate (β-CD/PA) composite nanofibers for cationic dye removal.
• To investigate the adsorption mechanism and capacity of the nanofibers.
• To evaluate the recyclability and performance under varying conditions.

Main Methods:

• Electrospinning of β-CD and PA mixture to create nanofiber adsorbents.
• Characterization of surface morphology and adsorption capacity.
• Adsorption experiments varying dye concentration and pH.
• Kinetic analysis using pseudo-second-order model.

Main Results:

• β-CD/PA nanofibers demonstrated effective removal of various cationic dyes.
• Optimized adsorption capacities ranged from 18.9 mg/g to 155.2 mg/g for tested dyes.
• Adsorption followed pseudo-second-order kinetics, indicating chemisorption.
• The adsorbent exhibited high recyclability and easy separation from dye solutions.

Conclusions:

• β-CD/PA composite nanofibers are a promising recyclable adsorbent for cationic dye wastewater treatment.
• The host-guest inclusion complex and electrostatic interactions are key removal mechanisms.
• The material's performance is influenced by dye concentration and pH, with potential for optimization.