Optimization of MCM-41 Mesoporous Material Mixed Matrix Polyethersulfone Membrane for Dye Removal

Area of Science:

• Materials Science
• Chemical Engineering
• Environmental Science

Background:

• Polyethersulfone (PES) membranes are crucial for nanofiltration (NF) but suffer from fouling by organic dyes.
• Incorporating MCM-41 mesoporous material into PES membranes offers a strategy to mitigate fouling and enhance performance.
• Energy efficiency remains a challenge in membrane operations, necessitating process optimization.

Purpose of the Study:

• To optimize operating conditions for incorporating MCM-41 into PES membranes for enhanced nanofiltration.
• To investigate the impact of MCM-41 content, feed pH, and dye concentration on membrane permeability and fouling.
• To identify optimal parameters for maximizing flux and minimizing energy consumption in dye removal processes.

Main Methods:

• Response Surface Methodology (RSM) and Analysis of Variance (ANOVA) were employed for process optimization and statistical analysis.
• The study systematically varied feed pH (3-11), MCM-41 content (0-1 wt.%), and dye concentration (10-100 ppm) for Acid Black 210 (AB-210) and Rose Bengal (RB) dyes.
• Membrane permeability was measured to evaluate the performance under different operating conditions.

Main Results:

• Optimal PES/MCM-41 membrane performance achieved flux values of 64.25 L·m⁻²·h⁻¹·bar⁻¹ for AB-210 and 63.16 L·m⁻²·h⁻¹·bar⁻¹ for RB.
• Optimal parameters identified: ~0.8 wt.% MCM-41, 10 ppm dye concentration, and pH 3 for RB dye.
• Feed pH had minimal impact on AB-210 dye permeation but showed minor effects on RB dye performance.

Conclusions:

• The optimized PES/MCM-41 membranes demonstrate significant potential for efficient dye removal in nanofiltration applications.
• The study successfully identified key operating parameters for maximizing membrane flux and performance.
• Further research can leverage these findings to develop more energy-efficient and fouling-resistant membrane systems for wastewater treatment.