Biochars from modified sugarcane bagasse for manganese removal from mining effluents.

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorCastro, Amanda Eugênio de-
Autor(es): dc.creatorPenido, Evanise Silva-
Autor(es): dc.creatorSouza, Thamirís Ferreira-
Autor(es): dc.creatorCamargos, Júlia Borges-
Autor(es): dc.creatorLobato, Raphael Longuinhos Monteiro-
Autor(es): dc.creatorSoares, Jenaina Ribeiro-
Autor(es): dc.creatorFerreira, Gabriel Max Dias-
Autor(es): dc.creatorFerreira, Guilherme Max Dias-
Data de aceite: dc.date.accessioned2025-08-21T15:36:38Z-
Data de disponibilização: dc.date.available2025-08-21T15:36:38Z-
Data de envio: dc.date.issued2025-03-20-
Data de envio: dc.date.issued2022-
Fonte completa do material: dc.identifierhttps://www.repositorio.ufop.br/handle/123456789/19983-
Fonte completa do material: dc.identifierhttps://www.sciencedirect.com/science/article/pii/S2213343723015002-
Fonte completa do material: dc.identifierhttps://doi.org/10.1016/j.jece.2023.110761-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1019668-
Descrição: dc.descriptionBiochars from sugarcane bagasse (non-treated or pretreated with NaOH or H3PO4) were obtained at different pyrolysis temperatures (400 or 500 ◦C) and applied as adsorbents for removal of Mn(II) from aqueous solution. A detailed adsorption study of Mn(II) on the biochars was performed and mechanisms of Mn(II) removal were elucidated. The biochar with better adsorption performance was applied for Mn(II) removal from mining ef fluents. The pretreatment of biomass with NaOH and the lower pyrolysis temperature (400 ◦C) increased the number of basic oxygenated groups on the surface of adsorbent, favoring the Mn(II) adsorption. The biochar pretreated with base (up to 98% removal) was nearly twice more efficient for Mn(II) removal than that pre treated with acid. FTIR and XPS results showed that complexation between oxygenated groups and the metal is an important mechanism of adsorption. XRD and XPS results indicated the formation of MnO and cation ex change as other mechanisms for Mn removal. DFT calculations suggested that C––O and C-OH groups on the biochar can favor a direct interaction between active carbons on BC surface and Mn(II). The biochar with best adsorption performance reached up to 65.8% of Mn(II) uptake from real mining effluent, showing the feasibility of using BC from sugarcane treated with NaOH to remove Mn from complex effluents. Practicality of employing the material was evaluated by reusability assays and cost estimations. Our findings point advance in the field of biochar application for Mn removal and reveal the importance of application of these materials in real conditions.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsrestrito-
Palavras-chave: dc.subjectAgro-industrial residues-
Palavras-chave: dc.subjectBiomass modification-
Palavras-chave: dc.subjectBasic treatment-
Palavras-chave: dc.subjectAdsorption-
Título: dc.titleBiochars from modified sugarcane bagasse for manganese removal from mining effluents.-
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