Competitive Adsorption of Congo red in Single and Binary Systems Using a Low-cost Adsorbent

Area of Science:

• Environmental Science
• Materials Science
• Chemical Engineering

Background:

• Sawdust from Parkia biglobosa was utilized as a cost-effective adsorbent.
• The study focused on removing dye from aqueous solutions.

Purpose of the Study:

• To evaluate the adsorption capacity of Parkia biglobosa sawdust for Congo red dye.
• To investigate dye removal in both single and binary dye systems.

Main Methods:

• Optimized parameters included pH, contact time, initial dye concentration, and adsorbent dose.
• Adsorption equilibrium data were analyzed using kinetic and isotherm models.

Main Results:

• Optimal adsorption occurred at 600 minutes, 0.2 g adsorbent dose, and low pH.
• The Freundlich isotherm model best described the equilibrium data (R² > 0.9).
• Binary dye systems demonstrated a synergistic effect, enhancing Congo red adsorption.

Conclusions:

• Parkia biglobosa sawdust is a viable adsorbent for Congo red removal.
• The study highlights its potential for treating industrial wastewater containing dyes.