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Doxycycline Loaded Collagen-Chitosan Composite Scaffold for the Accelerated Healing of Diabetic Wounds

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Sustainable and efficient activated carbon/Mg-Cr LDH/modified chitosan composite for synergistic remediation of

Nabel A Negm¹, Hassan A Rudayni², Ahmed A Allam²

¹Egyptian Petroleum Research Institute, Nasr City, Cairo, Egypt.

International Journal of Biological Macromolecules

|January 27, 2026

Summary

This summary is machine-generated.

A novel composite adsorbent effectively removes organic pollutants like β-Estradiol and Chrysoidine from wastewater. This sustainable material demonstrates high efficiency and reusability for effective bioremediation.

Keywords:

Amino-chitosan Chrysoidine Enhanced adsorption Layered double hydroxide β-Estradiol

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Area of Science:

Environmental Chemistry
Materials Science
Water Treatment Technologies

Background:

Global water quality is threatened by domestic, agricultural, and industrial contaminants.
Biosorption offers an eco-friendly approach to wastewater treatment.
Emerging pollutants like β-Estradiol and Chrysoidine pose significant environmental risks.

Purpose of the Study:

To synthesize and characterize a novel composite adsorbent for removing β-Estradiol and Chrysoidine from wastewater.
To investigate the adsorption mechanism, kinetics, and thermodynamics.
To evaluate the adsorbent's reusability and sustainability for practical applications.

Main Methods:

Synthesis of a composite adsorbent using activated carbon, Mg/Cr-layered double hydroxide (LDH), and modified chitosan.
Characterization using FTIR, XPS, XRD, N₂-BET, and SEM.
Batch adsorption experiments to determine optimal conditions (pH, dosage, concentration) and study kinetics and isotherms.
Reusability tests using green solvents for regeneration.

Main Results:

The composite adsorbent exhibited a heterogeneous, porous structure.
Optimal removal efficiencies of 25.9 mg/g for β-Estradiol and 29.43 mg/g for Chrysoidine were achieved at pH 7.8.
Adsorption followed pseudo-2nd-order kinetics and the Freundlich isotherm model, indicating chemisorption on a heterogeneous surface.
The adsorbent maintained high efficiency after five regeneration cycles using green solvents.

Conclusions:

The developed composite adsorbent is a stable, efficient, and sustainable material for the bioremediation of organic pollutants.
The study highlights the potential of this material to address the gap between biosorbent sustainability and reusability.
This research contributes to developing effective strategies for wastewater treatment and environmental protection.