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Vol. 37 No. 12 (2025): Vol 37 Issue 12, 2025

Copyright (c) 2025 KOFFI PIERRE DIT ADAMA N'GORAN, Naminata Sangare, Kakou Charles Kinimo, N’guessan Louis Berenger Kouassi, Lemeyonouin Aliou Guillaume Pohan, Donourou Diabate, Koffi Marcellin Yao, Albert Trokourey

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This work is licensed under a Creative Commons Attribution 4.0 International License.

Sustainable Fabrication of Magnetic Biochar from Corncob Waste for Efficient Removal of Indigo Carmine from Textile Effluent

https://doi.org/10.14233/ajchem.2025.34891
Koffi Pierre Dit Adama N’goran
Département de Mathématiques Physique Chimie, Université Peleforo GON COULIBALY, BP 1328 Korhogo, Côte d’Ivoire
https://orcid.org/0000-0002-2690-7626
Naminata Sangare
Laboratoire de Chimie Physique, Université Félix Houphouët-Boigny, 22 BP 582 Abidjan 22, Côte d’Ivoire
https://orcid.org/0009-0009-1891-5077
Kakou Charles Kinimo
Département de Mathématiques Physique Chimie, Université Peleforo GON COULIBALY, BP 1328 Korhogo, Côte d’Ivoire
https://orcid.org/0000-0003-4640-8020
N’guessan Louis Berenger Kouassi
Département de Mathématiques Physique Chimie, Université Peleforo GON COULIBALY, BP 1328 Korhogo, Côte d’Ivoire
https://orcid.org/0000-0003-1819-7633
Lemeyonouin Aliou Guillaume Pohan
Laboratoire de Chimie Physique, Université Félix Houphouët-Boigny, 22 BP 582 Abidjan 22, Côte d’Ivoire
https://orcid.org/0000-0001-5421-8521
Donourou Diabate
Laboratoire de Chimie Physique, Université Félix Houphouët-Boigny, 22 BP 582 Abidjan 22, Côte d’Ivoire
Koffi Marcellin Yao
Centre de Recherches Océanologiques, Département Environnement, 29 rue des Pêcheurs, BP V 18 Abidjan, Côte d’Ivoire
Albert Trokourey
Laboratoire de Chimie Physique, Université Félix Houphouët-Boigny, 22 BP 582 Abidjan 22, Côte d’Ivoire

Corresponding Author(s) : Koffi Pierre Dit Adama N’goran

ngorankoffipierre@gmail.com

Asian Journal of Chemistry, Vol. 37 No. 12 (2025): Vol 37 Issue 12, 2025

Abstract

This work aimed to remove indigo carmine from water using an iron oxide–corncob biochar (α-Fe2O3-C) composite synthesized hydrothermally and characterized by SEM, XRD, FTIR and TGA techniques. The composite averaging 20.63 nm, contained carboxylic, hydroxyl, phenolic and alcoholic groups. Adsorption analysis showed higher efficiencies for α-Fe2O3-C than for raw biochar in both aqueous solutions (88.58-96.66% versus 71.94-79.93%) and real effluent (48.01-61.90% versus 31.74-43.66%). The Langmuir model best described adsorption on biochar, while the Freundlich model fitted the best for the magnetic based biochar composite. Maximum capacities (Qmax) were 4.76 mg/g (biochar) and 12.72 mg/g (α-Fe2O3-C). Overall, the composite significantly improved indigo carmine removal and shows potential for treating dye-contaminated industrial effluents.

Keywords

Iron oxide Corncob biochar Indigo carmine Adsorption Textile effluent
(1)
N’goran, K. P. D. A.; Sangare, N.; Kinimo, K. C.; Kouassi, N. L. B.; Pohan, L. A. G.; Diabate, D.; Yao, K. M.; Trokourey, A. Sustainable Fabrication of Magnetic Biochar from Corncob Waste for Efficient Removal of Indigo Carmine from Textile Effluent. ajc 2025, 37, 3167-3176.
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