Modeling and optimizing Acid Orange 142 degradation in aqueous solution by non-thermal plasma.

Area of Science:

• Environmental Chemistry
• Plasma Technology
• Wastewater Treatment

Background:

• Acid Orange 142 (AO142) is a persistent textile dye pollutant.
• Effective degradation methods are crucial for textile wastewater treatment.

Purpose of the Study:

• To investigate and optimize plasma treatment parameters for AO142 degradation.
• To develop a predictive model for decolorization efficiency.

Main Methods:

• Box-Behnken response surface methodology (BBD-RSM) was employed.
• Key factors studied included electrode material, initial pH, Fe2+ concentration, and treatment time.
• Analytical techniques (UV-Vis, FT-IR, TOC, GC-MS) were used for analysis.

Main Results:

• An optimized model achieved an R2 of 0.8005 and R2adj of 0.9307.
• Optimal conditions: steel electrode, pH 3.0, 0.9 mM Fe2+, 20 min treatment.
• Achieved a decolorization efficiency of 95.05%.

Conclusions:

• Plasma treatment is an effective method for AO142 degradation.
• The developed BBD-RSM model accurately predicts and optimizes the process.
• Degradation of the dye molecule was confirmed through various analytical methods.