Use este identificador para citar ou linkar para este item: http://repositorio.ufc.br/handle/riufc/66840
Tipo: Artigo de Periódico
Título: Characterization and evaluation of copper and nickel biosorption on acidic algae Sargassum Filipendula
Autor(es): Kleinübing, Sirlei Jaiana
Vieira, Rodrigo Silveira
Beppu, Marisa Masumi
Guibal, Eric
Silva, Meuris Gurgel Carlos da
Palavras-chave: 13C NMR;FT-IR;MEV;Alginate;Acid treatment
Data do documento: 2010
Instituição/Editor/Publicador: Materials Research
Citação: VIEIRA, R. S. et al. Characterization and evaluation of copper and nickel biosorption on acidic algae Sargassum Filipendula. Materials Research, Vol. 13, n. 4, p. 541-550, 2010.
Abstract: The marine algae Sargassum filipendula was collected from São Paulo seashore (Brazil) and submitted to treatment with acid. The biosorption mechanisms of Cu2+ and Ni2+ ions onto acidic algae Sargassum filipendula were examined using various analytical techniques: Fourier-transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and potentiometric titration (pH ZPC). The effect of acidic treatment on algae by hydrochloric acid (pH 2.0, 3.0, 4.0 and 5.0) was evaluated for Cu2+ and Ni2+ adsorption. Alginate was extracted from raw algae and the two types of acids present in the biomass (β-D-mannuronic (M) and α-L-guluronic (G) acid) were characterized by 13C NMR. The M/G ratio was found to be 0.50. According to the pH ZPC analysis, at a pH higher than 5.5 the acidified algae surface presents a negative charge. The FT-IR analyses showed that the main chemical groups involved in the biosorption were carboxylic, alcoholic, sulfonate and amino groups.
URI: http://www.repositorio.ufc.br/handle/riufc/66840
ISSN: 1516-1439
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