Synthesis and application of an unprecedented bioadsorbent for removing arsenic from aqueous systems.

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorMaia, Luisa Cardoso-
Autor(es): dc.creatorSoares, Liliane Catone-
Autor(es): dc.creatorCarvalho, Megg Madonyk Cota Elias-
Autor(es): dc.creatorSantos , Grazielle Rocha dos-
Autor(es): dc.creatorAzevedo, Eduardo Ribeiro de-
Autor(es): dc.creatorSoares, Jaqueline dos Santos-
Autor(es): dc.creatorGurgel, Leandro Vinícius Alves-
Data de aceite: dc.date.accessioned2025-08-21T15:27:28Z-
Data de disponibilização: dc.date.available2025-08-21T15:27:28Z-
Data de envio: dc.date.issued2025-01-07-
Data de envio: dc.date.issued2025-01-07-
Data de envio: dc.date.issued2022-
Fonte completa do material: dc.identifierhttps://www.repositorio.ufop.br/handle/123456789/19398-
Fonte completa do material: dc.identifierhttps://www.sciencedirect.com/science/article/pii/S138358662301403X-
Fonte completa do material: dc.identifierhttps://doi.org/10.1016/j.seppur.2023.124495-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1015442-
Descrição: dc.descriptionA quaternary ammonium anion exchanger (SBTEA) was prepared from sugarcane bagasse (SB) employing an improved two-step synthesis method by chemical modification with epichlorohydrin (EPI) and triethylamine (TEA) using N,N-dimethylformamide as a solvent without catalyst. Two multivariate optimizations were utilized to determine optimum conditions for SBTEA synthesis using Doehlert experimental designs. The optimum synthesis conditions were: VEPI = 12.8 mL gSB− 1; VTEA = 22.0 mL gSB − 1; and T1 (etherification step) = T2 (amination step) = 100 ◦C. The chlorine and nitrogen contents of the SBTEA produced under these conditions with a 21-fold increase in the synthesis scale (SBTEA-LS) were 4.2 ± 0.1% and 1.485 ± 0.007%, respectively. The 13C Multi-CP SS NMR revealed that 1.7 quaternary ammonium groups were introduced for 10 cellobiose units. SBTEA-LS was used to remove As(V) from contaminated groundwater samples with high removal efficiency (95 ± 4%), even with strong competitors such as SO42− . The interactions involved in the adsorption were investigated through macroscopic and microscopic measurements, which suggested that the adsorption of As(V) on SBTEA-LS occurred mainly by ion exchange. Desorption experiments proved that SBTEA-LS could be efficiently regenerated (Edes > 90%) using an HNO3 solution, reducing operating costs and favoring technology upscaling.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsrestrito-
Palavras-chave: dc.subjectLignocellulosic biomass-
Palavras-chave: dc.subjectQuaternary ammonium-
Palavras-chave: dc.subjectAdsorption interaction-
Palavras-chave: dc.subjectDesorption-
Palavras-chave: dc.subjectWater treatment-
Título: dc.titleSynthesis and application of an unprecedented bioadsorbent for removing arsenic from aqueous systems.-
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