Co-pyrolysis of orange peel and eggshell for oxygenated rich composite: Process optimization with response surface...

Area of Science:

• Materials Science
• Environmental Chemistry
• Chemical Engineering

Background:

• Developing sustainable adsorbents from waste materials is crucial for environmental remediation.
• Orange peel and chicken eggshell are abundant, low-cost organic and inorganic waste streams.
• Co-pyrolysis offers a method to combine these waste materials into functional composites.

Purpose of the Study:

• To synthesize a composite material from orange peel and chicken eggshell via co-pyrolysis.
• To optimize co-pyrolysis conditions for maximizing adsorption capacity.
• To evaluate the composite's effectiveness in removing methylene blue dye.

Main Methods:

• Co-pyrolysis of orange peel and chicken eggshell.
• Optimization using Response Surface Methodology (RSM) with Box-Behnken Design (BBD).
• Characterization using FTIR, XRD, and SEM-EDS; surface area analysis.

Main Results:

• Optimal conditions: 300°C pyrolysis temperature, 1h residence time, 0.5 mixing ratio.
• Maximum adsorption capacity of 167 mg/g for methylene blue removal.
• Characterization revealed enhanced surface area (64 m²/g) and oxygenated functional groups.

Conclusions:

• The co-pyrolysis composite effectively removes methylene blue dye.
• The Langmuir isotherm model accurately describes the adsorption behavior.
• This composite shows promise as a sustainable adsorbent for wastewater treatment.