Issue 35, 2024

High adsorption to methylene blue based on Fe3O4–N-banana-peel biomass charcoal

Abstract

This research focused on utilizing banana peel as the primary material for producing mesoporous biomass charcoal through one-step potassium hydroxide activation. Subsequently, the biomass charcoal underwent high-temperature calcination with varying impregnation ratios of KOH : BC for different durations in tubular furnaces set at different temperatures. The resultant biomass charcoal was then subjected to hydrothermal treatment with FeCl3·6H2O to produce biochar/iron oxide composites. The adsorption capabilities of these composites towards methylene blue (MB) were examined under various conditions, including pH (ranging from 3 to 12), temperature variations, and initial MB concentrations (ranging from 50 to 400 mg L−1). The adsorption behavior aligned with the Langmuir model and demonstrated quasi-secondary kinetics. After five adsorption cycles, the capacity decreased from 618.64 mg g−1 to 497.18 mg g−1, indicating considerable stability. Notably, Fe3O4–N-BC exhibited exceptional MB adsorption performance.

Graphical abstract: High adsorption to methylene blue based on Fe3O4–N-banana-peel biomass charcoal

Supplementary files

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Article information

Article type
Paper
Submitted
10 Jul 2024
Accepted
08 Aug 2024
First published
15 Aug 2024
This article is Open Access
Creative Commons BY license

RSC Adv., 2024,14, 25619-25628

High adsorption to methylene blue based on Fe3O4–N-banana-peel biomass charcoal

Z. Gong, M. Steven, Y. Chen, L. Huo, H. Xu, C. Guo, X. Yang, Y. Wang and X. Luo, RSC Adv., 2024, 14, 25619 DOI: 10.1039/D4RA04973J

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