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Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/5473
Tipo: Artigo de Periódico
Título: Biosorption of Pb(II) and Cd(II) ions by Agave sisalana (sisal fiber)
Título(s) alternativo(s): Microchemical Journal
Autor(es): Santos, Walter Nei Lopes dos
Cavalcante, Dannuza Dias
Silva, Erik Galvão Paranhos da
Virgens, Cesário Francisco das
Dias, Fábio de Souza
Autor(es): Santos, Walter Nei Lopes dos
Cavalcante, Dannuza Dias
Silva, Erik Galvão Paranhos da
Virgens, Cesário Francisco das
Dias, Fábio de Souza
Abstract: The present work proposes the use of Agave sisalana (sisal fiber) as an natural adsorbent for ions Pb(II) and Cd (II) biosorption from natural waters. The flame atomic absorption spectrometry was used for quantitative determination and study of the ions Pb(II) and Cd(II) adsorption on the solid phase. The Fourier transform infrared spectroscopy (FT IR) was used to investigate the sisal structure and the specific BET surface area was analyzed. The biosorption potential of sisal as biosorbent for the removal of the ions Pb(II) and Cd(II) from aqueous solution was investigate considering the followings parameters: pH, biomass amount and contact time. Langmuir and Freundlich isotherms were used to evaluate adsorption behavior of the ions on this solid phase. The results showed that sisal has a surface area to adsorption of 0.0233 m2g−1, and the OH and CO functional groups are the main involved in the biosorption. The best interpretation for the experimental data was given by Freundlich isotherm that proposes a monolayer sorption with a heterogeneous energetic distribution of active sites, accompanied by interactions between sorbed molecules. The maximum monolayer biosorption capacity was found to be 1.85 mg g−1 for Cd (II) and 1.34 mg g−1 for Pb (II) at pH 7 and 296 K. This phase solid can be used for biosorption of cadmium and lead in polluted natural waters.
Palavras-chave: Cadmium
Lead
Biosorption
Agave sisalana
Sisal fiber
URI: http://www.repositorio.ufba.br/ri/handle/ri/5473
Data do documento: 2011
Aparece nas coleções:Artigo Publicado em Periódico (Química)

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