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Biosorption of Pb(II) by Thiobacillus ferrooxidans
Graciela Rodelo, Agustín Gómez, Arturo Ruiz Manríquez;
Revista Internacional de Contaminación Ambiental 2002 18(1)
Resumen
Inglés Español
Mainly due to the commercial value and the environmental impact that the heavy metals cause, a number of studies has been conducted to determine the possibility of removing and recovering them from diluted solutions. The traditional methods for removing metals have several disadvantages when they are present in concentrations lower than 100 mg/L. In this low concentration range, biosorption, which uses biological materials as adsorbents, has been considered an alternative method. In this work, variables such as pH and biomass chemical treatment have been studied for their effect on the capacity of lead biosorption by Thiobacillus ferrooxidans. Studies to determine the time for lead adsorption were carried out as well. Results indicated that a capacity as high as 443 mg of Pb(II)/g of dry biomass can be obtained at a temperature of 25 °C and pH 5 when cells under chemical treatment were used, and that the biosorption process occurred quickly within 30 minutes.

Palabras clave: metal recovery, heavy metals
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Universidad Autónoma del Estado de México
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