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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/5473

Title: Biosorption of Pb(II) and Cd(II) ions by Agave sisalana (sisal fiber)
Other Titles: Microchemical Journal
Authors: Santos, Walter Nei Lopes dos
Cavalcante, Dannuza Dias
Silva, Erik Galvão Paranhos da
Virgens, Cesário Francisco das
Dias, Fábio de Souza
Keywords: Cadmium;Lead;Biosorption;Agave sisalana;Sisal fiber
Issue Date: 2011
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.
Description: texto completo: acesso restrito. p. 269–273.
URI: http://www.repositorio.ufba.br/ri/handle/ri/5473
ISSN: 0026-265X
Appears in Collections:Artigos Publicados em Periódicos (Quimica)

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