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Biosorption of radioactive thorium by Sargassum filipendula

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Abstract

In the present work, the biosorption of radioactive thorium was investigated using a dry biomass of Sargassum filipendula as the biosorbent material. Radioactive solutions containing between 2.0 and 500.0μg thorium were tested by biosorption with S. filipendula, yielding uptake capacities from 20 to 100%, depending on the concentration of the solution. Kinetic studies indicated that equilibrium between the thorium solution and the solid fraction was achieved after three hours of contact and that a second-order model could express the equilibrium kinetics. In order to investigate the maximum biosorption capacity of the biomass an isotherm was done, based on the experimental data, which revealed the maximum uptake capacity to be 2.59 μmol thorium/g biomass. The experimental data fitted well to a Langmuir model, which provided a good correlation between the experimental and predicted thorium uptake values.

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Authors and Affiliations

  1. Instituto de Química, Programa de Pós-Graduação em Engenharia Química-PPG-EQ, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier 524, Pavilhão Haroldo Lisboa da Cunha, Sala 400, 20550-013, Rio de Janeiro, Brazil

    Marta Cristina Picardo, Ana Cristina de Melo Ferreira & Antonio Carlos Augusto da Costa

  2. Instituto de Radioproteção e Dosimetria, Av. Salvador Allende s/n, Recreio dos Bandeirantes, 22780-160, Rio de Janeiro, Brazil

    Ana Cristina de Melo Ferreira

Authors
  1. Marta Cristina Picardo
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  2. Ana Cristina de Melo Ferreira
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  3. Antonio Carlos Augusto da Costa
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Correspondence to Antonio Carlos Augusto da Costa.

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Picardo, M.C., de Melo Ferreira, A.C. & da Costa, A.C.A. Biosorption of radioactive thorium by Sargassum filipendula . Appl Biochem Biotechnol 134, 193–206 (2006). https://doi.org/10.1385/ABAB:134:3:193

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  • DOI: https://doi.org/10.1385/ABAB:134:3:193

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