Development of Chitosan Polysaccharide-Based Magnetic Gel for Direct Red 83:1 Removal from Water

Area of Science:

• Environmental Chemistry
• Materials Science

Background:

• Dye contamination in water poses a significant environmental challenge.
• Developing efficient and economical decolorization methods is crucial for industrial wastewater treatment.

Purpose of the Study:

• To synthesize and characterize a Chitosan-Fe polymeric gel for removing the azo dye Direct Red 83:1.
• To evaluate the adsorption performance and kinetics of the synthesized material.

Main Methods:

• Chitosan-Fe polymeric gel synthesized and characterized using FE-SEM, DSC, TGA, IR, and XRD.
• Adsorption studies conducted using kinetic tests and isotherm curves.
• Optimization of adsorption conditions (dosage and pH).

Main Results:

• FE-SEM revealed a porous structure; DSC/TGA confirmed thermal stability; IR indicated iron coordination; XRD confirmed crystallinity.
• Optimal adsorption conditions determined at 1 g dosage and pH 7.0.
• Maximum adsorption capacity (qmax) of 17.46 mg/g.
• Adsorption followed pseudo-second-order kinetics (R² = 0.999) and Temkin isotherm (R² = 0.946), indicating heterogeneous adsorption.

Conclusions:

• The synthesized Chitosan-Fe polymeric gel exhibits excellent adsorption properties for Direct Red 83:1.
• The material facilitates easy separation of purified water, making it suitable for industrial decolorization.