Biosorption of lead by the brown seaweed Sargassum filipendula - batch and continuous pilot studies

Denise Mesquita Vieira ^[1] ; Antonio Carlos Augusto da Costa ^[2] ; Cristiane Assumpção Henriques ^[2] ; Vicelma Luiz Cardoso ^[3] ; Francisca Pessôa de França ^[1]
1. [1] Universidade Federal do Rio de Janeiro
  
  Universidade Federal do Rio de Janeiro
  
  Brasil
2. [2] Universidade do Estado do Rio de Janeiro
  
  Universidade do Estado do Rio de Janeiro
  
  Brasil
3. [3] Universidade Federal de Uberlândia
  
  Universidade Federal de Uberlândia
  
  Brasil
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Localización: Electronic Journal of Biotechnology, ISSN-e 0717-3458, Vol. 10, Nº. 3, 2007, págs. 368-375
Idioma: inglés
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Resumen
- The biosorption of lead by the brown alga Sargassum filipendula was studied. pH 4.0 was the optimum value for the biosorption of lead. Isotherms indicated that for solutions containing 0.03 ± 0.001 up to 3.27 ± 0.04 mmol/L of lead, 2.0g/L was the optimum biomass concentration. The Langmuir model was fitted to represent the experimental data, and the kinetics of biosorption presented equilibrium in 30 min. The continuous system operated for 56 hrs presenting a 100% binding of ionic lead, which corresponds to an accumulation of 168 g lead, equivalent to a load of 1.7 mmol ionic lead/g Sargassum filipendula. The results that were obtained in a continuous system showed a gradual saturation of the biomass in the reactors