Chitosan-based composite films to remove cationic and anionic dyes simultaneously from aqueous solutions: Modeling...

Area of Science:

• Materials Science
• Environmental Chemistry
• Nanotechnology

Background:

• Simultaneous removal of cationic and anionic dyes from water is crucial.
• Developing effective adsorbents is essential for water remediation.

Purpose of the Study:

• To synthesize and characterize a chitosan-based composite film for simultaneous dye removal.
• To evaluate the adsorption performance and mechanism for methylene blue and methyl orange.

Main Methods:

• Chitosan/poly-2-aminothiazole composite film reinforced with multi-walled carbon nanotube-Mg Al-layered double hydroxide (CPML) synthesized.
• Characterization using SEM, TGA, FTIR, XRD, and BET.
• Adsorption studies using Response Surface Methodology (RSM) with varying parameters.

Main Results:

• CPML exhibited high adsorption capacities: 471.12 mg g-1 for methylene blue and 230.87 mg g-1 for methyl orange.
• Adsorption followed Langmuir isotherm and pseudo-second-order kinetics, indicating monolayer adsorption.
• The CPML composite demonstrated excellent reusability over multiple cycles.

Conclusions:

• The synthesized CPML composite is a highly effective adsorbent for simultaneous removal of cationic and anionic dyes.
• This material shows significant potential for treating dye-polluted industrial wastewater.
• The study highlights the efficacy of nanocomposite materials in environmental remediation.