The removal of Basic Blue 3 from aqueous solutions by chitosan-based adsorbent: batch studies

Area of Science:

• Environmental Science
• Materials Science
• Chemistry

Background:

• Wastewater contamination by synthetic dyes is a significant environmental concern.
• Chitosan-based materials offer promising adsorption capabilities for dye removal.

Purpose of the Study:

• To investigate the efficacy of CHITOD material for Basic Blue 3 (BB 3) dye removal from aqueous solutions.
• To evaluate the influence of adsorption parameters on dye removal efficiency.

Main Methods:

• Batch adsorption experiments were conducted to study the effect of time, sorbent mass, and initial dye concentration.
• Adsorption isotherm and kinetic models were applied to analyze the experimental data.
• Non-linear regression methods were used for parameter estimation.

Main Results:

• CHITOD material demonstrated high sorption capacities for BB 3 dye.
• The Langmuir isotherm model best described the adsorption equilibrium.
• Adsorption kinetics followed a pseudo-second order model, indicating a rapid process.
• The sorption process was found to be exothermic and spontaneous, influenced by sulfonate groups.

Conclusions:

• CHITOD material is a highly effective adsorbent for Basic Blue 3 dye removal.
• The adsorption process is rapid, spontaneous, and well-described by pseudo-second order kinetics and Langmuir isotherm.
• This study supports the use of chitosan-based materials for efficient dye wastewater treatment.