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Core-shell architecture based on bio-sourced porous carbon: the shape formation mechanism at the solid/liquid
Anfar Zakaria1,2,3, Jada Amane2,3, El Alem Noureddine1
1Materials and Environment Laboratory, Ibn Zohr University Agadir 8000 Morocco Zakaria.anfar@uha.fr +21255530757.
RSC Advances
|May 9, 2022
Summary
Agri-food waste was converted into porous carbon (PC) core-shell particles. These novel particles efficiently remove dyes from wastewater, offering a sustainable solution for waste valorization and water purification.
Area of Science:
- Materials Science
- Environmental Science
- Biotechnology
Background:
- Agri-food waste presents a significant disposal challenge.
- Valorization of waste streams into valuable materials is crucial for a circular economy.
- Microbial activation offers a sustainable route for waste transformation.
Purpose of the Study:
- To activate agri-food waste via microbial action to produce bio-digestate.
- To transform bio-digestate into porous carbon (PC) for novel material synthesis.
- To develop and characterize core-shell particles for wastewater treatment.
Main Methods:
- Microbial activation of agri-food waste.
- Synthesis of porous carbon (PC) from bio-digestate.
- Preparation of alginate-calcium ion shell on PC core.
- Characterization using SEM, TEM, Raman spectroscopy, and XPS.
- Adsorption studies for dye removal (MB, CV, CR).
Main Results:
- Core-shell particles (PC-alginate-calcium) were successfully synthesized.
- Electrostatic attraction between PC, alginate, and Ca2+ ions confirmed the shell formation.
- PC particles were graphitic, porous, and functionalized with hydroxyl and carboxylic groups.
- PC exhibited pH-dependent surface charge and particle size.
- Efficient removal of methylene blue, crystal violet, and congo red from wastewater was achieved.
Conclusions:
- Microbial activation of agri-food waste is a viable method for producing functional porous carbon.
- The synthesized core-shell particles demonstrate excellent adsorption capabilities for wastewater dyes.
- This approach offers a sustainable solution for waste valorization and water remediation without solid/liquid separation issues.
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