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Related Experiment Video

Updated: May 22, 2025

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

Published on: April 7, 2017

Waste based chitosan membranes for dye removal.

V Castro¹, M L García Fernández¹, R M Negri²

¹Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina.

International Journal of Biological Macromolecules

|May 10, 2025

Summary

This study developed sustainable chitosan membranes using lemon waste and copper (Cu²⁺) for wastewater dye removal. These eco-friendly membranes show significant potential for removing dyes like methyl orange and crystal violet.

Keywords:

Chitosan Circular economy Sorption

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Area of Science:

Materials Science
Environmental Science
Green Chemistry

Background:

Water contamination by dyes is a significant global environmental challenge.
Developing sustainable and cost-effective methods for dye removal is crucial for environmental protection.

Purpose of the Study:

To explore the dye removal potential of chitosan-based membranes modified with lemon waste and copper (Cu²⁺).
To investigate the application of circular economy and green chemistry principles in wastewater treatment.

Main Methods:

Membrane fabrication using solvent casting with chitosan, lemon waste, and Cu²⁺.
Structural modification via NaOH treatment and crosslinking with CuSO₄.
Characterization using ATR-FTIR, XPS, and mechanical property analysis.

Main Results:

NaOH treatment and lemon extract significantly increased Cu²⁺ sorption capacity (1800-2500 mg/g).
Chitosan membranes demonstrated effective removal of methyl orange (≥72%) and crystal violet, with recyclability over multiple cycles.
Sorption mechanisms involve more than just coulombic interactions, influenced by membrane composition and pH.

Conclusions:

Chitosan membranes incorporating lemon peel extract or Cu²⁺ offer a sustainable alternative for wastewater dye sorption.
The developed materials align with circular economy and green chemistry principles.
Scalability for Cu²⁺-chitosan membranes in industrial applications is feasible.