Arsenate removal from aqueous solutions : thermodynamic and kinetic study on iron hydroxide-impregnated corn cob.

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorSilva, Eloísa Stéphanie da-
Autor(es): dc.creatorPires, Renata de Castro-
Autor(es): dc.creatorGurgel, Leandro Vinícius Alves-
Autor(es): dc.creatorLeão, Versiane Albis-
Data de aceite: dc.date.accessioned2026-08-11T11:23:43Z-
Data de disponibilização: dc.date.available2026-08-11T11:23:43Z-
Data de envio: dc.date.issued2026-01-22-
Data de envio: dc.date.issued2023-
Fonte completa do material: dc.identifierhttps://www.repositorio.ufop.br/handle/123456789/21266-
Fonte completa do material: dc.identifierhttps://www.journalssystem.com/ppmp/pdf-196592-117126?filename=Arsenate%20removal%20from.pdf-
Fonte completa do material: dc.identifierhttps://doi.org/10.37190/ppmp/196592-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1187822-
Descrição: dc.descriptionThe contamination of water resources with arsenic is a serious environmental problem. This research investigated the use of a strategic agricultural waste for Brazil, i.e., corn cob as a low-cost, biodegradable, and eco-efficient material for As(V) adsorption. Arsenate removal from an aqueous solution with iron hydroxide impregnated corn cob (IHCC) was investigated under different pH values (2-10). FTIR spectra revealed that monodentate complexes were formed during the adsorption of arsenate on IHCC. Furthermore, SEM micrographs revealed a uniform distribution of Fe(III) and also As(V) on the IHCC. IHCC was efficient in the removal of arsenic from acidic solutions, mainly those having pH values between 2 and 3 at temperatures below 50°C. The adsorption kinetics followed the pseudo-second order model with an activation energy of 39.35 ± 6.99 kJ mol-1 implying that chemical reaction was the controlling step of arsenic adsorption by IHCC. In addition, arsenic adsorption on IHCC was (i) an entropically driven, (ii) spontaneous, and (iii) endothermic phenomenon (+23.82 kJ mol-1) and involved electrostatic adsorption and chemosorption (Qmax = 40 mg/g, at 25°C). Therefore, a promising sustainable and environmentally friendly solution for the use of IHCC was devised in the current work.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsrestrito-
Palavras-chave: dc.subjectBiosorbent-
Palavras-chave: dc.subjectToxic metals-
Palavras-chave: dc.subjectImpregnation-
Palavras-chave: dc.subjectAgricultural wastes-
Palavras-chave: dc.subjectMine waters-
Título: dc.titleArsenate removal from aqueous solutions : thermodynamic and kinetic study on iron hydroxide-impregnated corn cob.-
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